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 86B543A3E71 for ; Tue, 31 Mar 2026 19:24:37 +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=1774985077; cv=none; b=CHoLMsuxdyNAlke2AG+x923KiddJDLcOI8rLhuHPOid+rPvyBx00bleka7MN2gqtqGoQiEra5hU3xamHrLDJ5qSp6A3QWrmazvhaeELq8AfvJ/KJdMZX0Po/l9WQyrNTlWACFosBPvGNdyu8EZS5ansmtssy/088eOdGTYncFXI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774985077; c=relaxed/simple; bh=ca2PhavqgDv2R9in2fzAJY6/zNAPdq8KaVAU3DEM2AI=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=JdZV/4LbiWJz5bmnCBCdmuwbxYxgZ/PxofPRpNaITpmbaxbUPAMuDW+bjhL+fNipunKpceJIz4Msnw+Veko9Za0cxGeiHwhW1Raf/2+wwTS6Gsi2M7dAHGhrtFH76fYEVxkF0TCxHAoeFypV1bHqYUDUsCTBALccYTgSEcmJ0FM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MetRsd34; 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="MetRsd34" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 77C7BC19424; Tue, 31 Mar 2026 19:24:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774985077; bh=ca2PhavqgDv2R9in2fzAJY6/zNAPdq8KaVAU3DEM2AI=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=MetRsd341qzHrULJEq2bVsKizErCgynV7J0GC7Q2dtCkgw8QiIApupfym6tT996Vu IISFGcC3jVQlAur409SfraNezvSw4WypGqwN4V4ZXJjNNr1iCmau04fVq0IMZXDx8z VSSaCyUYxaRgEvERiarMBBEx4fowr+qorp1yy4bZ0l6u2f4kiMorT62wjgKx8HBcL3 fq79rhf6s/PIpCSdwFUBLayJ8vgkG3cLLkk+KCWbybagL/84GoZtn9Um0PqqrGcShS /0j+A32slRa5B73MY3PTIb8/MTJ4c+CWNnf1zg/R3yQx1pk82bOkDS42BSV2OmWTai 1fFL5RyLzHqKA== From: Pratyush Yadav To: Pasha Tatashin Cc: rppt@kernel.org, akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, dmatlack@google.com, pratyush@kernel.org, skhawaja@google.com Subject: Re: [PATCH v3 03/10] liveupdate: Protect file handler list with rwsem In-Reply-To: <20260327033335.696621-4-pasha.tatashin@soleen.com> (Pasha Tatashin's message of "Fri, 27 Mar 2026 03:33:27 +0000") References: <20260327033335.696621-1-pasha.tatashin@soleen.com> <20260327033335.696621-4-pasha.tatashin@soleen.com> Date: Tue, 31 Mar 2026 19:24:33 +0000 Message-ID: <2vxzwlyrhkem.fsf@kernel.org> User-Agent: Gnus/5.13 (Gnus v5.13) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Fri, Mar 27 2026, Pasha Tatashin wrote: > Because liveupdate file handlers will no longer hold a module reference > when registered, we must ensure that the access to the handler list is > protected against concurrent module unloading. > > Utilize the global luo_register_rwlock to protect the global registry of > file handlers. Read locks are taken during list traversals in > luo_preserve_file() and luo_file_deserialize(). Write locks are taken > during registration and unregistration. > > Signed-off-by: Pasha Tatashin Reviewed-by: Pratyush Yadav (Google) [...] -- Regards, Pratyush Yadav