GNU bug report logs -
#27666
[grep on GPFS filesystem] SEEK_HOLE problem
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Reported by: Moyard John <John.Moyard <at> cnes.fr>
Date: Wed, 12 Jul 2017 11:58:02 UTC
Severity: normal
Done: Paul Eggert <eggert <at> cs.ucla.edu>
Bug is archived. No further changes may be made.
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Message #8 received at 27666 <at> debbugs.gnu.org (full text, mbox):
[Message part 1 (text/plain, inline)]
On 07/12/2017 04:27 AM, Moyard John wrote:
> Hi,
>
> I use GPFS file system and I have sometimes an issue using grep command.
> When issue occurs with the following message "Binary file <myfile> matches"
> But "<myfile>" is an ASCII one, not a binary file.
> The problem seems to deals with lseek(SEEK_HOLE) command and a file not completely flushed after close.
If lseek(SEEK_HOLE) returns a mid-file offset when the file is first
created, but not later after the file has been synced, then that is a
bug in the filesystem which should be reported to the appropriate
filesystem/kernel folks. SEEK_HOLE is only allowed to return a mid-file
offset if reading the file at that point in time would read NUL bytes,
and NUL bytes are indeed binary data.
> It could take several seconds to save the entire file on the disk.
Does running 'sync' prior to grep solve the problem?
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
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This bug report was last modified 5 years and 194 days ago.
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