From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2DE58380 for ; Thu, 19 Dec 2024 00:33:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734568397; cv=none; b=GJ2x226qYYm4ZrNIM4LgyBG/MR9a5gjUA7I9q4vejk4O3lLD9fkWid8bllSsedQhL4kqimGi4xzxq8+/tGGONXZ3koGEcWeBFUmuXyGphC1igKlbpX41wLfbIxsXd1uWH+nfX6QXXxzxMIQySOkFqH+1JXbAm0ugC3NjYfZNY/Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734568397; c=relaxed/simple; bh=UzW0ZvjVIQJT+YnebWLftiz2YW4fVdbONHTvrsg7YbU=; h=Date:To:From:Subject:Message-Id; b=WHb2S8RDsLuKe8lLwE763+Wzo+5RZtfleeyKwpAlIdsDE8OeNsuchewYBvBwfstRyfvXpjTyj8wtDcz5NNglzJhAOhpahlruWaj9inM6KrylRCGkeZtpm+7KJeWdlQsPQ5YMrCtTK4vVDztAonwo/EHpvgPaMV1z0ROmlHwaAk8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=b75p3X1M; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="b75p3X1M" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 95F9CC4CECD; Thu, 19 Dec 2024 00:33:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1734568396; bh=UzW0ZvjVIQJT+YnebWLftiz2YW4fVdbONHTvrsg7YbU=; h=Date:To:From:Subject:From; b=b75p3X1M1cCNAIRTtN76BoLj3ktVLEGKfIioIOnYToR7fJ0bRw3GA+C8tAaqruhce kMlxmIO7IaZyLnEttgepdues/fDhriJuDeCoCcG/GgYw8NnAp1KACRevb9gJWO4eB1 B54Kus1IQTnyF/R0tu8RW74VoDOTTJZlxjz3m8oA= Date: Wed, 18 Dec 2024 16:33:15 -0800 To: mm-commits@vger.kernel.org,yosryahmed@google.com,shakeel.butt@linux.dev,roman.gushchin@linux.dev,mhocko@kernel.org,hughd@google.com,hannes@cmpxchg.org,chrisl@kernel.org,baohua@kernel.org,kasong@tencent.com,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-memcontrol-avoid-duplicated-memcg-enable-check.patch added to mm-unstable branch Message-Id: <20241219003316.95F9CC4CECD@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm, memcontrol: avoid duplicated memcg enable check has been added to the -mm mm-unstable branch. Its filename is mm-memcontrol-avoid-duplicated-memcg-enable-check.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-memcontrol-avoid-duplicated-memcg-enable-check.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Kairui Song Subject: mm, memcontrol: avoid duplicated memcg enable check Date: Wed, 18 Dec 2024 19:46:30 +0800 Patch series "mm/swap_cgroup: remove global swap cgroup lock", v3. This series removes the global swap cgroup lock. The critical section of this lock is very short but it's still a bottle neck for mass parallel swap workloads. Up to 10% performance gain for tmpfs build kernel test on a 48c96t system under memory pressure, and no regression for other cases: This patch (of 3): mem_cgroup_uncharge_swap() includes a mem_cgroup_disabled() check, so the caller doesn't need to check that. Link: https://lkml.kernel.org/r/20241218114633.85196-1-ryncsn@gmail.com Link: https://lkml.kernel.org/r/20241218114633.85196-2-ryncsn@gmail.com Signed-off-by: Kairui Song Reviewed-by: Yosry Ahmed Reviewed-by: Roman Gushchin Acked-by: Shakeel Butt Acked-by: Chris Li Cc: Barry Song Cc: Hugh Dickins Cc: Johannes Weiner Cc: Michal Hocko Cc: Yosry Ahmed Signed-off-by: Andrew Morton --- mm/memcontrol.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/memcontrol.c~mm-memcontrol-avoid-duplicated-memcg-enable-check +++ a/mm/memcontrol.c @@ -4595,7 +4595,7 @@ void mem_cgroup_swapin_uncharge_swap(swp * correspond 1:1 to page and swap slot lifetimes: we charge the * page to memory here, and uncharge swap when the slot is freed. */ - if (!mem_cgroup_disabled() && do_memsw_account()) { + if (do_memsw_account()) { /* * The swap entry might not get freed for a long time, * let's not wait for it. The page already received a _ Patches currently in -mm which might be from kasong@tencent.com are zram-refuse-to-use-zero-sized-block-device-as-backing-device.patch zram-fix-uninitialized-zram-not-releasing-backing-device.patch mm-memcontrol-avoid-duplicated-memcg-enable-check.patch mm-swap_cgroup-remove-swap_cgroup_cmpxchg.patch mm-swap_cgroup-remove-global-swap-cgroup-lock.patch mm-swap_cgroup-decouple-swap-cgroup-recording-and-clearing.patch