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From: Davidlohr Bueso <dave@stgolabs.net>
To: Suren Baghdasaryan <surenb@google.com>
Cc: akpm@linux-foundation.org, willy@infradead.org,
	liam.howlett@oracle.com, lorenzo.stoakes@oracle.com,
	mhocko@suse.com, vbabka@suse.cz, hannes@cmpxchg.org,
	mjguzik@gmail.com, oliver.sang@intel.com,
	mgorman@techsingularity.net, david@redhat.com, peterx@redhat.com,
	oleg@redhat.com, paulmck@kernel.org, brauner@kernel.org,
	dhowells@redhat.com, hdanton@sina.com, hughd@google.com,
	minchan@google.com, jannh@google.com, shakeel.butt@linux.dev,
	souravpanda@google.com, pasha.tatashin@soleen.com,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	kernel-team@android.com
Subject: Re: [PATCH 0/4] move per-vma lock into vm_area_struct
Date: Mon, 11 Nov 2024 16:03:34 -0800	[thread overview]
Message-ID: <20241112000334.ppzn3fap5glivpxl@offworld> (raw)
In-Reply-To: <CAJuCfpGw1Nnh3nonDHv-UAeqTB=-3z1+hJk9Opy4X-6mbvdEhw@mail.gmail.com>

On Mon, 11 Nov 2024, Suren Baghdasaryan wrote:

>I'm not really trying to claim performance gains here. I just want to
>make sure there are no regressions.

You might also fine tune the atomics with acquire/release standard locking
semantics, you will probably see better numbers in Android than what you
currently have in patch 3 with full barriers - and not particularly risky
as callers expect that behaviour already.

Thanks,
Davidlohr


  reply	other threads:[~2024-11-12  0:03 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-11-11 20:55 [PATCH 0/4] move per-vma lock into vm_area_struct Suren Baghdasaryan
2024-11-11 20:55 ` [PATCH 1/4] mm: introduce vma_start_read_locked{_nested} helpers Suren Baghdasaryan
2024-11-11 20:55 ` [PATCH 2/4] mm: move per-vma lock into vm_area_struct Suren Baghdasaryan
2024-11-12  9:36   ` kernel test robot
2024-11-12  9:47   ` kernel test robot
2024-11-12 10:18   ` kernel test robot
2024-11-12 15:57   ` Vlastimil Babka
2024-11-12 16:08     ` Suren Baghdasaryan
2024-11-12 16:58       ` Suren Baghdasaryan
2024-11-11 20:55 ` [PATCH 3/4] mm: replace rw_semaphore with atomic_t in vma_lock Suren Baghdasaryan
2024-11-12  0:06   ` Andrew Morton
2024-11-12  0:52     ` Suren Baghdasaryan
2024-11-12  0:35   ` Davidlohr Bueso
2024-11-12  0:59     ` Suren Baghdasaryan
2024-11-12  4:58   ` Matthew Wilcox
2024-11-12 15:18     ` Suren Baghdasaryan
2024-12-10 22:38       ` Peter Zijlstra
2024-12-10 23:37         ` Suren Baghdasaryan
2024-12-11  8:25           ` Peter Zijlstra
2024-12-11 15:20             ` Suren Baghdasaryan
2024-12-12  3:01               ` Suren Baghdasaryan
2024-12-12  9:16                 ` Peter Zijlstra
2024-12-12 14:17                   ` Suren Baghdasaryan
2024-12-12 14:19                     ` Suren Baghdasaryan
2024-12-13  4:48                       ` Suren Baghdasaryan
2024-12-13  9:57                         ` Peter Zijlstra
2024-12-13 17:45                           ` Suren Baghdasaryan
2024-12-13 18:19                             ` Matthew Wilcox
2024-12-13 18:35                             ` Peter Zijlstra
2024-12-13 18:37                               ` Suren Baghdasaryan
2024-12-16 19:32                                 ` Suren Baghdasaryan
2024-12-13  9:22                     ` Peter Zijlstra
2024-12-13 17:41                       ` Suren Baghdasaryan
2024-11-11 20:55 ` [PATCH 4/4] mm: move lesser used vma_area_struct members into the last cacheline Suren Baghdasaryan
2024-11-12 10:07   ` Vlastimil Babka
2024-11-12 15:45     ` Suren Baghdasaryan
2024-11-11 21:41 ` [PATCH 0/4] move per-vma lock into vm_area_struct Suren Baghdasaryan
2024-11-12  2:48   ` Liam R. Howlett
2024-11-12  3:27     ` Suren Baghdasaryan
2024-11-11 22:18 ` Davidlohr Bueso
2024-11-11 23:19   ` Suren Baghdasaryan
2024-11-12  0:03     ` Davidlohr Bueso [this message]
2024-11-12  0:43       ` Suren Baghdasaryan
2024-11-12  0:11     ` Andrew Morton
2024-11-12  0:48       ` Suren Baghdasaryan
2024-11-12  2:35 ` Liam R. Howlett
2024-11-12  3:23   ` Suren Baghdasaryan
2024-11-12  9:39 ` Lorenzo Stoakes
2024-11-12 15:38   ` Suren Baghdasaryan

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