From: Jan Kara <jack@suse.cz>
To: Amir Goldstein <amir73il@gmail.com>
Cc: kernel test robot <oliver.sang@intel.com>,
Jan Kara <jack@suse.cz>, LKML <linux-kernel@vger.kernel.org>,
lkp@lists.01.org, kbuild test robot <lkp@intel.com>,
ying.huang@intel.com, feng.tang@intel.com,
zhengjun.xing@intel.com,
Matthew Bobrowski <mbobrowski@mbobrowski.org>
Subject: Re: [fanotify] 7cea2a3c50: stress-ng.fanotify.ops_per_sec -23.4% regression
Date: Tue, 11 May 2021 14:46:32 +0200 [thread overview]
Message-ID: <20210511124632.GL24154@quack2.suse.cz> (raw)
In-Reply-To: <CAOQ4uxhoR8h0Mw=LJGSxMYWC1krjbwgzxbYNDjMmeo3sBAey1w@mail.gmail.com>
On Tue 11-05-21 14:13:38, Amir Goldstein wrote:
> On Tue, May 11, 2021 at 9:51 AM kernel test robot <oliver.sang@intel.com> wrote:
> >
> >
> >
> > Greeting,
> >
> > FYI, we noticed a -23.4% regression of stress-ng.fanotify.ops_per_sec due to commit:
> >
> >
> > commit: 7cea2a3c505e87a9d6afc78be4a7f7be636a73a7 ("fanotify: support limited functionality for unprivileged users")
> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> >
>
> I am not sure how this is possible.
> This commit only changes permissions to perform the operation.
> Is the test not being run as root?
Yeah, I've stared at it for some time and didn't come up with a sensible
explanation either. I guess we need to try to reproduce and see...
Honza
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
prev parent reply other threads:[~2021-05-11 12:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-11 7:08 [fanotify] 7cea2a3c50: stress-ng.fanotify.ops_per_sec -23.4% regression kernel test robot
2021-05-11 11:13 ` Amir Goldstein
2021-05-11 12:46 ` Jan Kara [this message]
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