linux-kernel - Re: [PATCH v2 3/3] mm: introduce mmap_lock_speculate_{try

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Message-ID: <CAJuCfpFF4AFiMZqEGzJKrboLJUqAMoz0b35L5MsQKVLOJnCmZw@mail.gmail.com>
Date: Fri, 22 Nov 2024 07:03:17 -0800
From: Suren Baghdasaryan <surenb@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: akpm@...ux-foundation.org, andrii@...nel.org, jannh@...gle.com, 
	Liam.Howlett@...cle.com, lorenzo.stoakes@...cle.com, vbabka@...e.cz, 
	mhocko@...nel.org, shakeel.butt@...ux.dev, hannes@...xchg.org, 
	david@...hat.com, willy@...radead.org, brauner@...nel.org, oleg@...hat.com, 
	arnd@...db.de, richard.weiyang@...il.com, zhangpeng.00@...edance.com, 
	linmiaohe@...wei.com, viro@...iv.linux.org.uk, hca@...ux.ibm.com, 
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/3] mm: introduce mmap_lock_speculate_{try_begin|retry}

On Fri, Nov 22, 2024 at 3:06 AM Peter Zijlstra <peterz@...radead.org> wrote:
>
> On Thu, Nov 21, 2024 at 08:28:26AM -0800, Suren Baghdasaryan wrote:
> > Add helper functions to speculatively perform operations without
> > read-locking mmap_lock, expecting that mmap_lock will not be
> > write-locked and mm is not modified from under us.
> >
> > Suggested-by: Peter Zijlstra <peterz@...radead.org>
> > Signed-off-by: Suren Baghdasaryan <surenb@...gle.com>
>
> Thanks for these, you're okay with me taking these through tip/perf/core
> for the next cycle along with Andrii's uprobe patch?

Yes, I'm fine with that plan. Thank you!