From: Mark Geisert <mark@maxrnd.com>
To: cygwin@cygwin.com
Subject: Re: /usr/bin/fallocate -v -d -l 2 myfile takes forever
Date: Tue, 5 Mar 2024 03:04:09 -0800 [thread overview]
Message-ID: <7b399273-39c3-4b60-8617-15def4f6aba4@maxrnd.com> (raw)
In-Reply-To: <CALXu0UdUXGPsbuwBhyT-_W7GXdsNw7=VYQvWS15d3fvJfyj7qg@mail.gmail.com>
On 3/5/2024 12:46 AM, Cedric Blancher via Cygwin wrote:
> On Mon, 29 Jan 2024 at 10:46, Mark Geisert via Cygwin <cygwin@cygwin.com> wrote:
>>
>> 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.
>>
>
> Any update on this issue?
Now that I've reviewed the whole email thread, I don't believe we ever
received feedback from you on whether leaving off the '-d' option and
doing the 'chattr +S' made any difference.
..mark
next prev parent reply other threads:[~2024-03-05 11:04 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
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 [this message]
2024-01-29 8:32 ` Brian Inglis
2024-01-29 10:39 ` Cedric Blancher
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