linux-kernel - Re: Linux 6.15-rc3

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Message-ID: <mhewqdlvb5ahqordw2nuebq7yvsxo7xvdas4vl6gehmbmypcil@v3fn7nzllglj>
Date: Tue, 22 Apr 2025 17:12:36 -0700
From: Shakeel Butt <shakeel.butt@...ux.dev>
To: Michael Larabel <Michael@...ronix.com>
Cc: Dave Airlie <airlied@...il.com>, Vlastimil Babka <vbabka@...e.cz>, 
	Alexei Starovoitov <alexei.starovoitov@...il.com>, Sebastian Sewior <bigeasy@...utronix.de>, 
	Andrew Morton <akpm@...ux-foundation.org>, Linus Torvalds <torvalds@...ux-foundation.org>, 
	Alexei Starovoitov <ast@...nel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 6.15-rc3

Ccing Michael

On Tue, Apr 22, 2025 at 04:37:59PM -0700, Alexei Starovoitov wrote:
> On Tue, Apr 22, 2025 at 4:01 PM Dave Airlie <airlied@...il.com> wrote:
> >
> > > Alexei Starovoitov (2):
> > >       locking/local_lock, mm: replace localtry_ helpers with
> > > local_trylock_t type
> >
> > This seems to have upset some phoronix nginx workload
> > https://www.phoronix.com/review/linux-615-nginx-regression/2
> 
> 3x regression? wow.
> Thanks for heads up.
> I'm staring at the patch and don't see it.
> Adding more experts.

Hi Michael,

Can you please share a bit more on your nginx workload and how can we
reproduce locally? In the mean time, I can try netperf locally to
reproduce.

I do have some followup optimizations [1, 2] which hopefully are aimed
for next release but we can try those as well.

[1] https://lkml.kernel.org/r/20250416180229.2902751-1-shakeel.butt@linux.dev
[2] https://lkml.kernel.org/r/20250410025752.92159-1-shakeel.butt@linux.dev

thanks,
Shakeel