public inbox for cygwin-developers@cygwin.com
 help / color / mirror / Atom feed
From: Takashi Yano <takashi.yano@nifty.ne.jp>
To: cygwin-developers@cygwin.com
Subject: Re: cygrunsrv + sshd + rsync = 20 times too slow -- throttled?
Date: Mon, 13 Sep 2021 08:54:31 +0900	[thread overview]
Message-ID: <20210913085431.8b13feaba276699fc3920a7b@nifty.ne.jp> (raw)
In-Reply-To: <dbf72463-dde5-f453-bf21-eb68c398a465@cornell.edu>

On Sun, 12 Sep 2021 17:46:47 -0400
Ken Brown wrote:
> On 9/12/2021 11:10 AM, Ken Brown wrote:
> > On 9/12/2021 7:04 AM, Takashi Yano wrote:
> >> On Sun, 12 Sep 2021 17:48:49 +0900
> >> Takashi Yano wrote:
> >>> On Sat, 11 Sep 2021 09:12:02 -0400
> >>> Ken Brown wrote:
> >>>> On 9/10/2021 10:35 PM, Takashi Yano wrote:
> >>>>> On Fri, 10 Sep 2021 22:17:21 -0400
> >>>>> Ken Brown wrote:
> >>>>>> On 9/10/2021 6:57 PM, Takashi Yano wrote:
> >>>>>>> On Fri, 10 Sep 2021 11:17:58 -0400
> >>>>>>> Ken Brown wrote:
> >>>>>>>> I've rerun your test with the latest version, and the test results are 
> >>>>>>>> similar.
> >>>>>>>>      I've also run a suite of fifo tests that I've accumulated, and they 
> >>>>>>>> all pass
> >>>>>>>> also, so I pushed your patch.
> >>>>>>>>
> >>>>>>>> I think we're in pretty good shape now.  The only detail remaining, 
> >>>>>>>> AFAIK, is
> >>>>>>>> how to best avoid a deadlock if the pipe has been created by a non-Cygwin
> >>>>>>>> process.  I've proposed a timeout, but maybe there's a better idea.
> >>>>>>>
> >>>>>>> I am not pretty sure what is the problem, but is not the following
> >>>>>>> patch enough?
> >>>>>>>
> >>>>>>> diff --git a/winsup/cygwin/fhandler.h b/winsup/cygwin/fhandler.h
> >>>>>>> index d309be2f7..13fba9a14 100644
> >>>>>>> --- a/winsup/cygwin/fhandler.h
> >>>>>>> +++ b/winsup/cygwin/fhandler.h
> >>>>>>> @@ -1205,6 +1205,7 @@ public:
> >>>>>>>       select_record *select_except (select_stuff *);
> >>>>>>>       char *get_proc_fd_name (char *buf);
> >>>>>>>       int open (int flags, mode_t mode = 0);
> >>>>>>> +  void open_setup (int flags);
> >>>>>>>       void fixup_after_fork (HANDLE);
> >>>>>>>       int dup (fhandler_base *child, int);
> >>>>>>>       int close ();
> >>>>>>> diff --git a/winsup/cygwin/fhandler_pipe.cc b/winsup/cygwin/fhandler_pipe.cc
> >>>>>>> index 6994a5dce..d84e6ad84 100644
> >>>>>>> --- a/winsup/cygwin/fhandler_pipe.cc
> >>>>>>> +++ b/winsup/cygwin/fhandler_pipe.cc
> >>>>>>> @@ -191,6 +191,17 @@ out:
> >>>>>>>       return 0;
> >>>>>>>     }
> >>>>>>>
> >>>>>>> +void
> >>>>>>> +fhandler_pipe::open_setup (int flags)
> >>>>>>> +{
> >>>>>>> +  fhandler_base::open_setup (flags);
> >>>>>>> +  if (get_dev () == FH_PIPER && !read_mtx)
> >>>>>>> +    {
> >>>>>>> +      SECURITY_ATTRIBUTES *sa = sec_none_cloexec (flags);
> >>>>>>> +      read_mtx = CreateMutexW (sa, FALSE, NULL);
> >>>>>>> +    }
> >>>>>>> +}
> >>>>>>> +
> >>>>>>>     off_t
> >>>>>>>     fhandler_pipe::lseek (off_t offset, int whence)
> >>>>>>>     {
> >>>>>>>
> >>>>>>>
> >>>>>>> AFAIK, another problem remaining is:
> >>>>>>>
> >>>>>>> On Mon, 6 Sep 2021 14:49:55 +0200
> >>>>>>> Corinna Vinschen wrote:
> >>>>>>>> - What about calling select for writing on pipes read by non-Cygwin
> >>>>>>>>      processes?  In that case, we still can't rely on WriteQuotaAvailable,
> >>>>>>>>      just as before.
> >>>>>>
> >>>>>> This is the problem I was talking about.  In this case the non-Cygwin process
> >>>>>> might have a large pending read, so that the Cygwin process calling select on
> >>>>>> the write side will see WriteQuotaAvailable == 0.  This could lead to a 
> >>>>>> deadlock
> >>>>>> with the Cygwin process waiting for write ready while the non-Cygwin 
> >>>>>> process is
> >>>>>> blocked trying to read.
> >>>>>
> >>>>> Then, the above patch is for another issue.
> >>>>> The problem happes when:
> >>>>> 1) Start command prompt.
> >>>>> 2) Run 'echo AAAAAAAAAAAA | \cygwin64\bin\cat
> >>>>> This causes hang up in cat. In this case, pipe is created by cmd.exe.
> >>>>> Therefore, read_mtx is not created.
> >>>>
> >>>> Confirmed, and your patch fixes it.  Maybe you should check for error in the
> >>>> call to CreateMutexW and print a debug message in that case.
> >>>>
> >>>>>> My suggestion is that we impose a timeout in this situation, after which 
> >>>>>> select
> >>>>>> reports write ready.
> >>>>>
> >>>>> Keeping read handle in write pipe (Corinna's query_hdl) causes problem
> >>>>> that write side cannot detect close on read side.
> >>>>> Is it possible to open read handle temporally when pipe_data_available()
> >>>>> is called?
> >>>>
> >>>> That would be nice, but I have no idea how you could do that.
> >>>
> >>> Hmm. Then, what about PoC code attached? This returns to Corinna's
> >>> query_hdl, and counts read/write handles to detect closing reader side.
> >>>
> >>> If the number of read handles is equal to number of write handles,
> >>> only the pairs of write handle and query_hdl are alive. So, read pipe
> >>> supposed to be closed.
> >>>
> >>> This patch depends another patch I posted a few hours ago.
> >>
> >> Revised a bit.
> > 
> > I don't see how this solves the problem.  In the case we were worried about 
> > where we have a non-Cygwin reader, the writer has no query_hdl, and you're just 
> > always reporting write ready, aren't you?  Or am I missing something?
> 
> BTW, we could just decide that always reporting write ready in this corner case 
> is acceptable.  But then we could just do that without going back to query_hdl.

The various combination of cygwin and non-cygwin cases resuts in:

W P R: current, query_hdl
c c c: OK     , OK
c c n: NG     , OK
c n c: OK     , OK
c n n: NG     , select() always report write ready

where

W: Writer
P: Pipe
R: Reder
c: cygwin
n: non-cygwin

* Reder requests larger block than pipe size.
* Writer cannot be non-cygwin because we assume the case
  that writer uses select().

-- 
Takashi Yano <takashi.yano@nifty.ne.jp>

  reply	other threads:[~2021-09-12 23:54 UTC|newest]

Thread overview: 250+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <41A583E1-C8E7-42AB-9F24-EEC33A41EC60@house.org>
     [not found] ` <20210825201845.07b6400b79dc5558a7761efe@nifty.ne.jp>
     [not found]   ` <f8106fe7-a2b8-d106-3061-4d888124f4b0@cornell.edu>
     [not found]     ` <20210826062934.54f2f2216021c095bb7ba13b@nifty.ne.jp>
     [not found]       ` <d0a8c57d-1ed1-6b4f-c6e7-cbe0e2ec8a1c@cornell.edu>
     [not found]         ` <3b560051-ab27-f392-ca4b-d1fd9b5733b0@cornell.edu>
     [not found]           ` <20210827202440.47706fc2fc07c5e9a1bc0047@nifty.ne.jp>
     [not found]             ` <4f2cb5f3-ce9c-c617-f65f-841a5eca096e@cornell.edu>
     [not found]               ` <20210828022111.91ef5b4ff24f6da9fadb489e@nifty.ne.jp>
     [not found]                 ` <YSn3L0W1M527utK0@calimero.vinschen.de>
     [not found]                   ` <20210828184102.f2206a8a9e5fe5cf24bf5e45@nifty.ne.jp>
     [not found]                     ` <YSok0PoCQn2TPPrn@calimero.vinschen.de>
     [not found]                       ` <20210829004346.c2f80469abc3a07fd4b2918d@nifty.ne.jp>
     [not found]                         ` <e8caa02f-be85-33bc-3f09-347c1cdb0923@cornell.edu>
     [not found]                           ` <20210829174124.0c1ae6c16a3e8da1f490abc7@nifty.ne.jp>
     [not found]                             ` <6e9bb35e-6f4f-cf78-e515-549da487b5ef@cornell.edu>
2021-08-30  7:57                               ` Corinna Vinschen
     [not found]                     ` <20210829180729.48b4e877f773cb3980c5766d@nifty.ne.jp>
     [not found]                       ` <789f056a-f164-d71d-1dc9-230f5a41846d@cornell.edu>
2021-08-30  8:27                         ` Corinna Vinschen
2021-08-30 13:00                           ` Corinna Vinschen
2021-08-30 13:20                             ` Corinna Vinschen
2021-08-30 13:41                               ` Ken Brown
2021-08-30 14:12                                 ` Corinna Vinschen
2021-08-30 14:52                                   ` Ken Brown
2021-08-30 15:15                                     ` Corinna Vinschen
     [not found]                         ` <20210830043756.8aa0ada77db0bfbbe3889f62@nifty.ne.jp>
     [not found]                           ` <47e5dd74-b940-f305-fd5a-c6c9d8f41305@cornell.edu>
2021-08-30  8:48                             ` Corinna Vinschen
     [not found]                       ` <c62d18df-ab7a-7233-62ee-29a8eced5353@cornell.edu>
     [not found]                         ` <20210830091314.f9a2cb71794d0f68cdb5eba7@nifty.ne.jp>
     [not found]                           ` <20210830092259.52f7d54fc3fa340738373af4@nifty.ne.jp>
     [not found]                             ` <d217ef03-7858-5e22-0aa6-f0507eedd9da@cornell.edu>
     [not found]                               ` <20210830170204.fa91eaf110f310f13b67abc3@nifty.ne.jp>
2021-08-30 10:20                                 ` Corinna Vinschen
2021-08-30 10:38                                   ` Corinna Vinschen
2021-08-30 12:04                                   ` Takashi Yano
2021-08-30 12:55                                     ` Corinna Vinschen
2021-08-30 13:31                                       ` Corinna Vinschen
2021-08-31  8:50                                         ` Takashi Yano
2021-08-30 13:51                                       ` Ken Brown
2021-08-30 15:00                                         ` Ken Brown
2021-08-30 15:19                                           ` Corinna Vinschen
2021-08-30 15:43                                             ` Ken Brown
2021-08-31  9:43                                               ` Corinna Vinschen
2021-08-31  8:52                                             ` Takashi Yano
2021-08-31  9:04                                               ` Corinna Vinschen
2021-08-31 11:05                                                 ` Takashi Yano
2021-08-31 15:20                                                   ` Corinna Vinschen
2021-09-01  2:39                                                     ` Takashi Yano
2021-09-01  8:03                                                       ` Corinna Vinschen
2021-09-01  8:13                                                         ` Corinna Vinschen
2021-08-30 13:36                               ` Ken Brown
2021-08-30 14:05                                 ` Corinna Vinschen
2021-08-30 15:53                                   ` Corinna Vinschen
2021-08-30 17:00                                     ` Corinna Vinschen
2021-08-30 17:11                                       ` Corinna Vinschen
2021-08-30 18:59                                       ` Ken Brown
2021-08-30 19:12                                         ` Ken Brown
2021-08-30 20:21                                         ` Corinna Vinschen
2021-08-30 20:14                                       ` Corinna Vinschen
2021-08-30 20:47                                         ` Ken Brown
2021-08-31  8:55                                         ` Takashi Yano
2021-08-31  9:08                                           ` Corinna Vinschen
2021-08-31  9:25                                             ` Takashi Yano
2021-08-31 10:05                                               ` Corinna Vinschen
2021-08-31 10:18                                                 ` Corinna Vinschen
2021-08-31 11:45                                                   ` Takashi Yano
2021-08-31 12:31                                                     ` Takashi Yano
2021-08-31 15:08                                                       ` Corinna Vinschen
2021-08-31 12:33                                                     ` Ken Brown
2021-08-31 15:18                                                       ` Corinna Vinschen
2021-08-31 15:27                                                         ` Corinna Vinschen
2021-08-31 15:50                                                           ` Corinna Vinschen
2021-08-31 16:19                                                             ` Ken Brown
2021-08-31 16:38                                                               ` Ken Brown
2021-08-31 17:30                                                                 ` Corinna Vinschen
2021-08-31 18:54                                                                   ` Ken Brown
2021-08-31 19:51                                                                     ` Corinna Vinschen
2021-08-31 23:02                                                             ` Takashi Yano
2021-09-01  0:16                                                               ` Takashi Yano
2021-09-01  8:07                                                                 ` Corinna Vinschen
2021-09-01  8:23                                                                   ` Takashi Yano
2021-09-01  8:46                                                                     ` Corinna Vinschen
2021-09-01 12:56                                                                       ` Ken Brown
2021-09-01 13:52                                                                         ` Corinna Vinschen
2021-09-01 23:02                                                                           ` Ken Brown
2021-09-02  8:17                                                                             ` Corinna Vinschen
2021-09-02 13:01                                                                               ` Ken Brown
2021-09-02 19:00                                                                                 ` Corinna Vinschen
2021-09-02 19:34                                                                                   ` Ken Brown
2021-09-02 19:35                                                                                   ` Corinna Vinschen
2021-09-02 20:19                                                                                     ` Ken Brown
2021-09-03  9:12                                                                                       ` Corinna Vinschen
2021-09-03 19:00                                                                                         ` Ken Brown
2021-09-03 19:53                                                                                           ` Ken Brown
2021-09-03 19:54                                                                                           ` Corinna Vinschen
2021-09-03 20:05                                                                                             ` Ken Brown
2021-09-03 10:00                                                                                     ` Takashi Yano
2021-09-03 10:13                                                                                       ` Takashi Yano
2021-09-03 11:31                                                                                         ` Corinna Vinschen
2021-09-03 11:41                                                                                           ` Corinna Vinschen
2021-09-03 12:13                                                                                             ` Ken Brown
2021-09-03 15:00                                                                                               ` Corinna Vinschen
2021-09-03 15:14                                                                                                 ` Ken Brown
2021-09-03 15:17                                                                                                   ` Corinna Vinschen
2021-09-03 12:22                                                                                             ` Takashi Yano
2021-09-03 13:27                                                                                               ` Ken Brown
2021-09-03 15:37                                                                                               ` Corinna Vinschen
2021-09-04 12:02                                                                                                 ` Takashi Yano
2021-09-04 12:37                                                                                                   ` Takashi Yano
2021-09-04 14:04                                                                                                     ` Ken Brown
2021-09-04 23:15                                                                                                       ` Takashi Yano
2021-09-05 13:40                                                                                                         ` Takashi Yano
2021-09-05 13:50                                                                                                           ` Takashi Yano
2021-09-05 18:47                                                                                                             ` Ken Brown
2021-09-05 19:42                                                                                                               ` Takashi Yano
2021-09-05 20:09                                                                                                               ` Takashi Yano
2021-09-05 20:27                                                                                                                 ` Ken Brown
2021-09-06  8:13                                                                                                                 ` Corinna Vinschen
2021-09-06 11:16                                                                                                                   ` Takashi Yano
2021-09-06 12:49                                                                                                                     ` Corinna Vinschen
2021-09-06 13:16                                                                                                                       ` Takashi Yano
2021-09-06 16:08                                                                                                                         ` Corinna Vinschen
2021-09-06 23:39                                                                                                                           ` Takashi Yano
2021-09-07  9:14                                                                                                                             ` Corinna Vinschen
2021-09-07 11:03                                                                                                                               ` Takashi Yano
2021-09-07 16:14                                                                                                                       ` Ken Brown
2021-09-07 18:26                                                                                                                         ` Corinna Vinschen
2021-09-03 10:38                                                                                       ` Takashi Yano
2021-09-08 11:32                                                                                     ` Takashi Yano
2021-09-08 11:55                                                                                       ` Corinna Vinschen
2021-09-08 12:33                                                                                         ` Takashi Yano
2021-09-08 17:43                                                                                         ` Ken Brown
2021-09-08 18:28                                                                                           ` Corinna Vinschen
2021-09-02  8:15                                                                       ` Takashi Yano
2021-09-02 18:54                                                                         ` Corinna Vinschen
2021-09-07  3:26             ` Takashi Yano
2021-09-07 10:50               ` Takashi Yano
2021-09-08  0:07                 ` Takashi Yano
2021-09-08  4:11                   ` Takashi Yano
2021-09-08  9:01                     ` Takashi Yano
2021-09-08  9:01                     ` Corinna Vinschen
2021-09-08  9:26                       ` Corinna Vinschen
2021-09-08  9:45                         ` Takashi Yano
2021-09-08 10:04                           ` Corinna Vinschen
2021-09-08 10:45                             ` Takashi Yano
2021-09-08 10:51                               ` Corinna Vinschen
2021-09-09  3:21                                 ` Takashi Yano
2021-09-09  9:37                                   ` Corinna Vinschen
2021-09-09 10:55                                     ` Takashi Yano
2021-09-09 11:41                                       ` Corinna Vinschen
2021-09-08  9:37                       ` Takashi Yano
2021-09-09  3:41               ` Takashi Yano
2021-09-09  8:05                 ` Takashi Yano
2021-09-09 12:19                   ` Takashi Yano
2021-09-09 12:42                     ` Takashi Yano
2021-09-09 21:53                       ` Takashi Yano
2021-09-10  3:41                         ` Takashi Yano
2021-09-10 10:57                       ` Ken Brown
2021-09-10 15:17                         ` Ken Brown
2021-09-10 15:26                           ` Corinna Vinschen
2021-09-10 22:57                           ` Takashi Yano
2021-09-11  2:17                             ` Ken Brown
2021-09-11  2:35                               ` Takashi Yano
2021-09-11 13:12                                 ` Ken Brown
2021-09-12  6:23                                   ` Takashi Yano
2021-09-12 14:39                                     ` Ken Brown
2021-09-13  9:11                                       ` Corinna Vinschen
2021-09-13 12:30                                         ` Ken Brown
2021-09-12  8:48                                   ` Takashi Yano
2021-09-12 11:04                                     ` Takashi Yano
2021-09-12 15:10                                       ` Ken Brown
2021-09-12 21:46                                         ` Ken Brown
2021-09-12 23:54                                           ` Takashi Yano [this message]
2021-09-13  2:19                                             ` Ken Brown
2021-09-13  8:40                                             ` Takashi Yano
2021-09-13 12:51                                               ` Ken Brown
2021-09-13 17:05                                                 ` Ken Brown
2021-09-13  9:42                                           ` Corinna Vinschen
2021-09-13 13:03                                             ` Ken Brown
2021-09-13 18:39                                               ` Takashi Yano
2021-09-12 23:41                                         ` Takashi Yano
2021-09-13 17:42                                       ` Ken Brown
2021-09-13 18:54                                         ` Takashi Yano
2021-09-13 18:32                                       ` Corinna Vinschen
2021-09-13 19:37                                         ` Takashi Yano
2021-09-13 20:15                                           ` Corinna Vinschen
2021-09-14  8:07                                             ` Takashi Yano
2021-09-14  8:47                                               ` Corinna Vinschen
2021-09-14 12:38                                                 ` Ken Brown
2021-09-14 14:15                                                   ` Corinna Vinschen
2021-09-14  8:08                                           ` Takashi Yano
2021-09-14  9:03                                             ` Corinna Vinschen
2021-09-14  9:56                                               ` Takashi Yano
2021-09-14 10:19                                                 ` Takashi Yano
2021-09-14 11:03                                                   ` Corinna Vinschen
2021-09-14 12:05                                                     ` Takashi Yano
2021-09-14 14:17                                                       ` Corinna Vinschen
2021-09-14 22:14                                                       ` Ken Brown
2021-09-15  0:21                                                         ` Takashi Yano
2021-09-15  0:44                                                           ` Takashi Yano
2021-09-15  0:59                                                             ` Takashi Yano
2021-09-15  9:57                                                               ` Corinna Vinschen
2021-09-15 10:48                                                                 ` Takashi Yano
2021-09-15 10:58                                                                   ` Takashi Yano
2021-09-15 11:34                                                                     ` Corinna Vinschen
2021-09-15 11:40                                                                       ` Corinna Vinschen
2021-09-15 11:13                                                                   ` Corinna Vinschen
2021-09-15 11:41                                                                     ` Ken Brown
2021-09-15 11:49                                                                       ` Corinna Vinschen
2021-09-15 11:54                                                                     ` Takashi Yano
2021-09-15 12:20                                                                       ` Corinna Vinschen
2021-09-15 13:04                                                                         ` Takashi Yano
2021-09-15 13:42                                                                           ` Corinna Vinschen
2021-09-15 16:22                                                                             ` Ken Brown
2021-09-15 17:09                                                                               ` Ken Brown
2021-09-16  0:22                                                                                 ` Takashi Yano
2021-09-16  2:28                                                                                   ` Ken Brown
2021-09-16  9:09                                                                                 ` Takashi Yano
2021-09-16 13:02                                                                                   ` Takashi Yano
2021-09-16 13:25                                                                                     ` Corinna Vinschen
2021-09-16 14:27                                                                                       ` Takashi Yano
2021-09-16 15:01                                                                                         ` Corinna Vinschen
2021-09-16 15:46                                                                                           ` Ken Brown
2021-09-16 16:02                                                                                             ` Ken Brown
2021-09-16 19:42                                                                                               ` Takashi Yano
2021-09-16 20:28                                                                                                 ` Ken Brown
2021-09-16 19:48                                                                                               ` Ken Brown
2021-09-16 20:01                                                                                                 ` Takashi Yano
2021-09-17  2:25                                                                                                   ` Ken Brown
2021-09-17  8:31                                                                                                     ` Takashi Yano
2021-09-17 11:16                                                                                                       ` Ken Brown
2021-09-17 16:23                                                                                                         ` Takashi Yano
2021-09-17 17:08                                                                                                           ` Ken Brown
2021-09-17 17:39                                                                                                             ` Jon Turney
2021-09-17 17:43                                                                                                             ` Takashi Yano
2021-09-17 19:53                                                                                                               ` Ken Brown
2021-09-18  1:30                                                                                                                 ` Takashi Yano
2021-09-18  2:07                                                                                                                   ` Ken Brown
2021-09-18  2:10                                                                                                                     ` Ken Brown
2021-09-18  8:03                                                                                                                       ` Takashi Yano
2021-09-18 11:12                                                                                                                         ` Ken Brown
2021-09-18 11:35                                                                                                                           ` Takashi Yano
2021-09-18 14:11                                                                                                                             ` Jon Turney
2021-09-18 13:44                                                                                           ` Ken Brown
2021-09-19  1:31                                                                                             ` Takashi Yano
2021-09-19 14:35                                                                                               ` Ken Brown
2021-09-20  9:29                                                                                                 ` Takashi Yano
2021-09-16  0:13                                                                               ` Takashi Yano
2021-09-16  2:26                                                                                 ` Ken Brown
2021-09-13  9:07                                 ` Corinna Vinschen
2021-09-20 12:52                                   ` Takashi Yano
2021-09-20 19:14                                     ` Ken Brown
2021-09-20 21:09                                       ` Ken Brown
2021-09-20 21:21                                         ` Ken Brown
2021-09-20 21:27                                         ` Takashi Yano
2021-09-20 21:39                                           ` Ken Brown
2021-09-20 22:16                                             ` Takashi Yano
2021-09-20 22:46                                               ` Ken Brown
2021-09-20 22:50                                                 ` Ken Brown
2021-09-20 23:22                                                   ` Takashi Yano
2021-09-21  8:30                                                     ` Takashi Yano
2021-09-21  9:26                                                       ` Mark Geisert
2021-09-21 10:10                                                         ` Takashi Yano
2021-09-21 21:10                                                           ` Mark Geisert
2021-09-21 13:31                                                       ` Ken Brown
2021-09-21 15:36                                                         ` Takashi Yano
2021-09-21 18:51                                                           ` Ken Brown
2021-09-23  8:26                                                             ` Takashi Yano
2021-09-23 13:03                                                               ` Ken Brown
2021-09-23 15:03                                                                 ` Takashi Yano
2021-09-23 16:29                                                                   ` Ken Brown
2021-10-18 10:51                                                                   ` Corinna Vinschen
2021-10-18 12:02                                                                     ` Takashi Yano

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210913085431.8b13feaba276699fc3920a7b@nifty.ne.jp \
    --to=takashi.yano@nifty.ne.jp \
    --cc=cygwin-developers@cygwin.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).