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Subject:	Re: /usr/bin/fallocate -v -d -l 2 myfile takes forever
To:	cygwin AT cygwin DOT com
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From:	Cedric Blancher via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Cedric Blancher <cedric DOT blancher AT gmail DOT com>
Sender:	"Cygwin" <cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com>

On Mon, 29 Jan 2024 at 10:46, Mark Geisert via Cygwin <cygwin AT cygwin DOT 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?

Ced
-- 
Cedric Blancher <cedric DOT blancher AT gmail DOT com>
[https://plus.google.com/u/0/+CedricBlancher/]
Institute Pasteur

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