From: Breno Leitao <leitao@debian.org>
To: Christian Brauner <brauner@kernel.org>
Cc: kernel test robot <yi1.lai@intel.com>,
oe-lkp@lists.linux.dev, lkp@intel.com,
linux-kernel@vger.kernel.org, Mateusz Guzik <mjguzik@gmail.com>,
Oleg Nesterov <oleg@redhat.com>,
linux-fsdevel@vger.kernel.org
Subject: Re: [linus:master] [fs/pipe] f7f4665dc5: lmbench3.PIPE.bandwidth.MB/sec 18.5% regression
Date: Thu, 5 Nov 2026 07:28:00 -0800 [thread overview]
Message-ID: <auygOHcuBba_o132@gmail.com> (raw)
In-Reply-To: <20261105-trommeln-einspannen-radius-ccb4e174e407@brauner>
On Thu, Nov 05, 2026 at 04:04:58PM +0100, Christian Brauner wrote:
> On Thu, Nov 05, 2026 at 08:38:45AM +0800, kernel test robot wrote:
> > kernel test robot noticed a 18.5% regression of lmbench3.PIPE.bandwidth.MB/sec on:
> >
> > commit: f7f4665dc520fd8bbc1db20e59945773e03744a0 ("fs/pipe: unify the page pools into a single per-pipe pool") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> @Breno can you reproduce this?
> It's something we should at least investigate.
Ack, I will check it , but not today unfortunately.
I will come back to it tomorrow, and until end of week I will report my
findings.
next prev parent reply other threads:[~2026-11-05 15:28 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-05 0:38 [linus:master] [fs/pipe] f7f4665dc5: lmbench3.PIPE.bandwidth.MB/sec 18.5% regression kernel test robot
2026-11-05 15:04 ` Christian Brauner
2026-11-05 15:28 ` Breno Leitao [this message]
2026-11-05 15:57 ` Mateusz Guzik
2026-11-06 11:11 ` Breno Leitao
2026-11-06 13:44 ` Mateusz Guzik
2026-11-10 12:46 ` Breno Leitao
2026-11-10 14:44 ` Mateusz Guzik
2026-11-10 14:59 ` Breno Leitao
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