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 DA7E1188CAB; Mon, 15 Jul 2024 11:37:36 +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=1721043457; cv=none; b=AzkwJEjco/UqnuI45egMW9UZRd25TUEO1XizqAByQR+9+Gk14OhhlERQP4avjkC6vnhf5/o8eLO8usgvL88WqgIPvlm5tF0bp+54wL7vCNQm0SukIYB9PAqr1+NJS9UWr9t/Fizj27HzP7AHZ0dZn5ghu/nBNp76+WHjszB1y4g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721043457; c=relaxed/simple; bh=tyAZldTH+5oVW2/oSVpXIdVNSmITgWx1TexxtmkV0jA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=bW7P30hjzbAkPLczKG2E0GaccZ7V84wTZLomtrmVxTnDDkG6n3Splg/+7JxcwlvRkHpnBRmjwrJIWr43xCMlZqCXV6R9BUT/oq5Uyf2BLWB9vkgITmnFO9RuK99KQ3OJyOBkg1qaJYZPUj3Vw4Z4xcKF+PpUG/DHJVa8OvRjZ0I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DcZkYR+y; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DcZkYR+y" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D2E99C4AF0E; Mon, 15 Jul 2024 11:37:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1721043456; bh=tyAZldTH+5oVW2/oSVpXIdVNSmITgWx1TexxtmkV0jA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DcZkYR+yzZz/NcsML+/wHVznbzfBhksyG6VzyAUY0SLfqleTyS+qS2rTVa47BRzS1 ZqWijtCLx7mxZJvVmH/Bkpx79KOtqfAw89jm78+l6g6L77NmepgqOXspeuFCoHBNXJ PBU1QtCbCJqh53UpYNVKsS49GjZiFIqY/Rs/f0R6xwYDXkU9PAQi9XwKofghZ9uVP5 St0cbQPCa73XiLl5d/27zbJYenIDr8muZxFVjytyYDaWU6lbSpO1NIjRgMcXzXxlsr Gs3mtgXlGS15Vt3ioW8OqIpGZMAkQpHHMFAq2eIutrLAzx+dkJSh9llEfGstnH3OEf zoit4S0HeSlJg== From: Christian Brauner To: Mateusz Guzik Cc: Christian Brauner , viro@zeniv.linux.org.uk, jack@suse.cz, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, bharata@amd.com Subject: Re: [PATCH] vfs: use RCU in ilookup Date: Mon, 15 Jul 2024 13:37:14 +0200 Message-ID: <20240715-bundesweit-eckwerte-e5ddcae12fbc@brauner> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240715071324.265879-1-mjguzik@gmail.com> References: <20240715071324.265879-1-mjguzik@gmail.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Developer-Signature: v=1; a=openpgp-sha256; l=1183; i=brauner@kernel.org; h=from:subject:message-id; bh=tyAZldTH+5oVW2/oSVpXIdVNSmITgWx1TexxtmkV0jA=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMaRN5Xx7Q/HRoh/yxf83JrT/FopyEb25d6PrNkHbtTOXi eq37N0xs6OUhUGMi0FWTJHFod0kXG45T8Vmo0wNmDmsTCBDGLg4BWAiyQcZ/rsuWhbo+fLc/6/M k1wnRWz8LuM2fd03Cw5HDZf+i1UPRLQYGa7nfmw8Ep0yRWvx5IdORlamO+5e2RqUpHnwbuLNVx9 PyfABAA== X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Content-Transfer-Encoding: 8bit On Mon, 15 Jul 2024 09:13:24 +0200, Mateusz Guzik wrote: > A soft lockup in ilookup was reported when stress-testing a 512-way > system [1] (see [2] for full context) and it was verified that not > taking the lock shifts issues back to mm. > > [1] https://lore.kernel.org/linux-mm/56865e57-c250-44da-9713-cf1404595bcc@amd.com/ > [2] https://lore.kernel.org/linux-mm/d2841226-e27b-4d3d-a578-63587a3aa4f3@amd.com/ > > [...] Applied to the vfs.inode.rcu branch of the vfs/vfs.git tree. Patches in the vfs.inode.rcu branch should appear in linux-next soon. Please report any outstanding bugs that were missed during review in a new review to the original patch series allowing us to drop it. It's encouraged to provide Acked-bys and Reviewed-bys even though the patch has now been applied. If possible patch trailers will be updated. Note that commit hashes shown below are subject to change due to rebase, trailer updates or similar. If in doubt, please check the listed branch. tree: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git branch: vfs.inode.rcu [1/1] vfs: use RCU in ilookup https://git.kernel.org/vfs/vfs/c/2eae762dece6