Bug#1053241: glibc: please apply upstream patch to fix slow fstat
Hi,
On 2023-09-29 21:52, Fabio Pedretti wrote:
> Package: glibc
> Version: 2.36-9+deb12u1
> Severity: normal
> X-Debbugs-Cc: pedretti.fabio@gmail.com
>
> Dear Maintainer,
>
> glibc uses a slow version of fstat. Details are documented
> here: https://lwn.net/Articles/944214/
>
> A patch to fix this was merged in glibc:
> https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=551101e8240b7514fc646d1722f8b79c90362b8f
>
> The patch applies cleanly and builds fine also on bookworm glibc.
> Please consider apply it to fix slow fstat.
This patch changes the syscall used by binaries, so it has to be
considered with a lot of care in a stable release, it could break
existing seccomp filters. In any case it has to live a few months in
testing/unstable first.
Note that the kernel patch that improves the performance of fstatat, has
not been merge to the upstream stable tree, nor to bookworm.
In order to better understand the need for this patch in bookworm, could
you please give some details about your workload and the performance
impact it has?
Regards
Aurelien
--
Aurelien Jarno GPG: 4096R/1DDD8C9B
aurelien@aurel32.net http://aurel32.net
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