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 72810366DBC; Tue, 6 Jan 2026 17:54:52 +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=1767722092; cv=none; b=Xh6VJXfuuTBA1pq+xrxfMf8EfuqpzhY3lU5gXclr2rWVNa6CZyKy1GxY8u/Tw13Abf7q9U86bxTksTZTBVYKEmKfM1OL113LY9uBks4mytqyphFe1Mp4IuzokC52Y2QfnRFrGPiC1Bk3rE6XNtTs8sz0Ifim1Ht/tlAl1hXJc2M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767722092; c=relaxed/simple; bh=v2sDP0QArV+gbzzixJfSSBn0r6oALTCxT9HXYbfR9k8=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=fv8Ufi3KD7cPJuNY4LFJoNLPLMFJ5juXPFwkpzC3KeKRERblNuKpzDyNA0EW8SkepQRFHc9rTrJdUru/15hc4Q5TOOdLXd1bpyz+9VQy7B9jrBINyDHbpbrcaLil83FW9oDBxwNFQTuz4iZohXvy7t8AKvPqzUQi9cgEMyvi39s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rWtodjAM; 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="rWtodjAM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B39ABC116C6; Tue, 6 Jan 2026 17:54:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767722092; bh=v2sDP0QArV+gbzzixJfSSBn0r6oALTCxT9HXYbfR9k8=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=rWtodjAMlxnZe+ay7i47Un1eMblNV0jNUO4l7ZFdY1AKQPkYueQEvjvoj2xIcNH8F LJHoaJRLY0oyqLUEVDDzijkrCHyH/F0yHheIDx/TkvmL8D+cVOTAmAAYl2t75Dmjde sIrG268Ydfr8+Mm87IxSNmU8yVdvGRII7sBxapjguupEDrG0hnUuILpBIiYsfV/R/c WEqqWsakmqnUurdVp1qz/n3ijAIu4QB40fvbVKJasoRY5Hyuh0c0EGvxAIvKY6cfJS YwIZ2OltZy3Cu4bJZoxNIqcUw4WcGccp1l5RYmGemuRbc8ImU+3mu5y0p055Y7MeOf T7q+bXPZXFa5w== Message-ID: <01ebe0c6-6135-4937-a758-93a5fc78d7fe@kernel.org> Date: Tue, 6 Jan 2026 18:54:47 +0100 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/1] fs/writeback: skip AS_NO_DATA_INTEGRITY mappings in wait_sb_inodes() To: Miklos Szeredi Cc: Jan Kara , Joanne Koong , akpm@linux-foundation.org, linux-mm@kvack.org, athul.krishna.kr@protonmail.com, j.neuschaefer@gmx.net, carnil@debian.org, linux-fsdevel@vger.kernel.org, stable@vger.kernel.org References: <20251215030043.1431306-1-joannelkoong@gmail.com> <20251215030043.1431306-2-joannelkoong@gmail.com> <616c2e51-ff69-4ef9-9637-41f3ff8691dd@kernel.org> <238ef4ab-7ea3-442a-a344-a683dd64f818@kernel.org> From: "David Hildenbrand (Red Hat)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 1/6/26 17:05, Miklos Szeredi wrote: > On Tue, 6 Jan 2026 at 16:41, David Hildenbrand (Red Hat) > wrote: > >> I assume the usual suspects, including mm/memory-failure.c. >> >> memory_failure() not only contains a folio_wait_writeback() but also a >> folio_lock(), so twice the fun :) > > As long as it's run from a workqueue it shouldn't affect the rest of > the system, right? The wq thread will consume a nontrivial amount of > resources, I suppose, so it would be better to implement those waits > asynchronously. Good question. I know that memory_failure() can be triggered out of various context, but I never traced it back to its origin. -- Cheers David