From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin-patches@cygwin.com
Subject: Re: [PATCH] Cygwin: getdtablesize: always return OPEN_MAX_MAX
Date: Mon, 1 Feb 2021 10:50:54 +0100 [thread overview]
Message-ID: <20210201095054.GF375565@calimero.vinschen.de> (raw)
In-Reply-To: <9b430aa5-1033-ebef-b002-b1523355271c@cornell.edu>
On Jan 28 15:33, Ken Brown via Cygwin-patches wrote:
> On 1/28/2021 11:07 AM, Corinna Vinschen via Cygwin-patches wrote:
> > One problem is that there are some applications in the wild which run
> > loops up to either sysconf(_SC_OPEN_MAX) or OPEN_MAX to handle open
> > descriptors. tcsh is one of them. It may slow done tcsh quite a bit
> > if the loop runs to 3200 now every time.
>
> I don't use tcsh. Is it easy to test this?
I just checked the source. In the olden days, before the invention of
close-on-exec, tcsh closed all descriptors > 2 up to OPEN_MAX prior to
starting any executable.
With close-on-exec this happens only at startup and after an error
occured.
So testing should be easy: The tcsh startup may be noticably slower.
Corinna
next prev parent reply other threads:[~2021-02-01 9:50 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-28 2:51 Ken Brown
2021-01-28 10:20 ` Corinna Vinschen
2021-01-28 13:42 ` Ken Brown
2021-01-28 16:07 ` Corinna Vinschen
2021-01-28 16:13 ` Corinna Vinschen
2021-01-28 22:28 ` Ken Brown
2021-01-29 19:23 ` Ken Brown
2021-02-01 9:42 ` Corinna Vinschen
2021-01-28 20:33 ` Ken Brown
2021-02-01 9:50 ` Corinna Vinschen [this message]
2021-02-01 10:46 ` Corinna Vinschen
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