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a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1767722093; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=C3dIuZFRjgDFlW51LoZADH2ZoeovtFoXctOU67zoqhc=; b=ss7bOshwM7sTYAUFeHcoNXypduSzl4huU6N8nI9HEOYExIESa6bH2HJl1obja4kAkRg9oy MaLsbq8L4iS1g/NGLwkalK7KPKGG66NLSNqZU6U+lOkouHfTsZBVNgcXVA+VBBoAc+GaFW 6G+jxOjbmMbXhZ2VRGTwa7CY1DgvvlU= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 9D22A60007; Tue, 6 Jan 2026 17:54:52 +0000 (UTC) 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 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 X-Rspamd-Queue-Id: 3AA231A0004 X-Stat-Signature: 1w7w1g1i5c3mmgjckcbmf9ct4zzjhyz9 X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1767722093-705951 X-HE-Meta: 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 0LNAeVex UtrSZduD0T8Fc4RkLMD0PIs0UkukzOpB5dx1opXgcRye8Pf75cbED8ha5iY/iy3RhKDWqMVv7Bz+3jTxULYfNRZQg1JMTggC7sEanuO0pYQcD1cMWl/UVF1nLPve2RGz238Gf2SeJldrQysJTq1QhaIKLawRNqWSbPpDIn/wRzu95D4PI5rVmYY6vv9cHyMp4p72KhUAgC5ycN9kMzmpZnA03LPx8sxfZxgg2dEVoe3gByU+dYGRUYq2lmH8gYRwT9DzTTPYOfdDW/C6bzY07wgeqo+/DyWxVPn5vIvbyKZuMvjsqaIUA9Im8P+S/Bz54Bwgdb/GRkdzofCk= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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