From: Jan Kara <jack@suse.cz>
To: lkp@lists.01.org
Subject: Re: [fanotify] a8b98c808e: stress-ng.fanotify.ops_per_sec 32.2% improvement
Date: Thu, 03 Jun 2021 10:43:24 +0200 [thread overview]
Message-ID: <20210603084324.GC23647@quack2.suse.cz> (raw)
In-Reply-To: <CAOQ4uxjdtfriARxh_CiTxFi8=T6j065HtbJGnuAas7oyPNADKg@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 766 bytes --]
On Thu 03-06-21 09:57:15, Amir Goldstein wrote:
> On Thu, Jun 3, 2021 at 4:36 AM kernel test robot <oliver.sang@intel.com> wrote:
> >
> >
> >
> > Greeting,
> >
> > FYI, we noticed a 32.2% improvement of stress-ng.fanotify.ops_per_sec due to commit:
> >
> >
> > commit: a8b98c808eab3ec8f1b5a64be967b0f4af4cae43 ("fanotify: fix permission model of unprivileged group")
> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> >
> >
>
> I guess now we know what caused the reported regression:
> https://lore.kernel.org/lkml/20210511124632.GL24154(a)quack2.suse.cz/
>
> I didn't know that capable() is so significant.
Yeah, I wouldn't guess either. Interesting.
Honza
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
WARNING: multiple messages have this Message-ID (diff)
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>, Matthew Bobrowski <repnop@google.com>,
Christian Brauner <christian.brauner@ubuntu.com>,
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@linux.intel.com,
linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: Re: [fanotify] a8b98c808e: stress-ng.fanotify.ops_per_sec 32.2% improvement
Date: Thu, 3 Jun 2021 10:43:24 +0200 [thread overview]
Message-ID: <20210603084324.GC23647@quack2.suse.cz> (raw)
In-Reply-To: <CAOQ4uxjdtfriARxh_CiTxFi8=T6j065HtbJGnuAas7oyPNADKg@mail.gmail.com>
On Thu 03-06-21 09:57:15, Amir Goldstein wrote:
> On Thu, Jun 3, 2021 at 4:36 AM kernel test robot <oliver.sang@intel.com> wrote:
> >
> >
> >
> > Greeting,
> >
> > FYI, we noticed a 32.2% improvement of stress-ng.fanotify.ops_per_sec due to commit:
> >
> >
> > commit: a8b98c808eab3ec8f1b5a64be967b0f4af4cae43 ("fanotify: fix permission model of unprivileged group")
> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> >
> >
>
> I guess now we know what caused the reported regression:
> https://lore.kernel.org/lkml/20210511124632.GL24154@quack2.suse.cz/
>
> I didn't know that capable() is so significant.
Yeah, I wouldn't guess either. Interesting.
Honza
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
next prev parent reply other threads:[~2021-06-03 8:43 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-03 1:53 [fanotify] a8b98c808e: stress-ng.fanotify.ops_per_sec 32.2% improvement kernel test robot
2021-06-03 1:53 ` kernel test robot
2021-06-03 6:57 ` Amir Goldstein
2021-06-03 6:57 ` Amir Goldstein
2021-06-03 8:43 ` Jan Kara [this message]
2021-06-03 8:43 ` Jan Kara
2021-06-03 21:56 ` Matthew Bobrowski
2021-06-03 21:56 ` Matthew Bobrowski
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