From: Mark Geisert <mark@maxrnd.com>
To: cygwin@cygwin.com
Subject: Re: /usr/bin/fallocate -v -d -l 2 myfile takes forever
Date: Mon, 29 Jan 2024 01:45:56 -0800 [thread overview]
Message-ID: <1de1f9f9-f8ee-45bf-9c63-fd151b6714f7@maxrnd.com> (raw)
In-Reply-To: <e01112b1-a8c9-4aa9-a5a2-5827187106dd@maxrnd.com>
On 1/28/2024 11:56 PM, Mark Geisert via Cygwin wrote:
> On 1/28/2024 10:44 PM, Cedric Blancher via Cygwin wrote:
>> Good morning!
>>
>> rm -f myfile
>> touch myfile
>> /usr/bin/fallocate -v -d -l myfile takes forever with latest Cygwin 3.5
> ^ length goes here, before filename
>
> I believe you need to
> chattr +S myfile
> after the 'touch' to make the file sparsifiable.
>
> Also, I'm unsure if '-d' makes sense when initially allocating a sparse
> file. If I leave it off, fallocate does the right thing.
>
> I'm separately investigating the 'takes forever' report.
It's taking forever because it's in an infinite loop looking for data
followed by a hole, which is not present in a new file being created.
This is due to the '-d' option being specified. fallocate ought to
diagnose this condition rather than looping forever, but here we are.
It's possible we have an old fallocate from an old util-linux package.
I'll try to investigate this further when I have time.
..mark
next prev parent reply other threads:[~2024-01-29 9:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-29 6:44 Cedric Blancher
2024-01-29 7:56 ` Mark Geisert
2024-01-29 9:45 ` Mark Geisert [this message]
2024-03-05 8:46 ` Cedric Blancher
2024-03-05 10:43 ` Mark Geisert
2024-03-08 9:43 ` Mark Geisert
2024-03-05 11:04 ` Mark Geisert
2024-01-29 8:32 ` Brian Inglis
2024-01-29 10:39 ` Cedric Blancher
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=1de1f9f9-f8ee-45bf-9c63-fd151b6714f7@maxrnd.com \
--to=mark@maxrnd.com \
--cc=cygwin@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).