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t=1768815853; bh=bY2K7YbaDGhdDEwxbSPSrK9Bho/NX+G/IaXsX/yc9gI=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=c42FYPnOn66T+MvVDZwzUa2uGFNSY3ixID2WNxvELuDe0qV7V34R3EvM7W5bMGkx+ F1KmCeVW+XFTlx5vWimNanbMg4ytF0kykZLrFCzceTykdIR7iV3I8PNyZCeEdX8kyx HTdb5TmS3NP+Jkgi309jWE88kL2kmptAhOdtZdurNGE38b5S+aM86/d6/KjksfZIH9 wTMZ59EQ/VMbjvZq6+Ktx5pvax3rITnTIk95qAQ+f9cIl9apuBwYgw6z97iOlLninf BZEE1NJqlspZX0l8P3kvMck3LPk+VXmCsVwJjjWwemXwr/AkxJyQcol9ylfHgN6hw/ qoFABtElBleKA== Message-ID: <7b21ef98-e9f3-4e09-97ab-cf1ee9def41f@kernel.org> Date: Mon, 19 Jan 2026 10:44:08 +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: Andrew Morton Cc: Miklos Szeredi , Jan Kara , Joanne Koong , 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> <01ebe0c6-6135-4937-a758-93a5fc78d7fe@kernel.org> <20260118164051.521de8ad2758376c3e1d2d81@linux-foundation.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-Server: rspam03 X-Rspamd-Queue-Id: F23F9120002 X-Stat-Signature: 6mmdc1nfx5m9ktd7ksr5ibwmxqw8cwbt X-Rspam-User: X-HE-Tag: 1768815854-238009 X-HE-Meta: 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 s/pvb8UN 6bwTZEv16yHbodocjTjqUEfu0HzG/FUKvBpguAVA7J6HjPfdV+L+yarvYXA89j7UekqIbHjukHqjEQs3ikRb9n1Xc9Mqx6BfzJSKakI/Zlw9HwQ8u2h39oouCa0Otc5X/YCdxQrnEGKawmL7xiNIAT/xy8oCjCLSK5J+AnaXpC1qvUq9Dbd4mR5bQZEnrPqoPDd4pQ78YiT3ENL7JkLvjL96LQHg9ebA2fLSfgoDwGVAFYanpb08kr6eaAYtYKskmWCXD7+i7SQQYyTCArJ6SBnF6nWQdlXq0+PY/dB7VfoviV7fPLqyASVaV4S2ZYFY6CJcQmRN8Z/Z6Isk= 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 1/19/26 01:40, Andrew Morton wrote: > On Tue, 6 Jan 2026 18:54:47 +0100 "David Hildenbrand (Red Hat)" wrote: > >> 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. > > I'm seeing unhappy okays from David and Jan, so I'll upstream this > patch later in the week, unless someone stops me. Just to clarify, I'm happy with this patch as is. The semantics make perfect sense. -- Cheers David