From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7C199C624D3 for ; Wed, 2 Sep 2026 15:37:12 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 530616B00A6; Wed, 2 Sep 2026 11:37:11 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4E02D6B00AA; Wed, 2 Sep 2026 11:37:11 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3F6FD6B00AB; Wed, 2 Sep 2026 11:37:11 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 25C2C6B00A6 for ; Wed, 2 Sep 2026 11:37:11 -0400 (EDT) Received: from smtpin28.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay05.hostedemail.com (Postfix) with ESMTP id B11504028C for ; Wed, 2 Sep 2026 15:37:10 +0000 (UTC) X-FDA: 85169225820.28.56EC799 Received: from mta1.migadu.com (out-135.mta1.migadu.com [95.215.58.135]) by imf01.hostedemail.com (Postfix) with ESMTP id ADF2A40006 for ; Wed, 2 Sep 2026 15:37:08 +0000 (UTC) Authentication-Results: imf01.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=a7q4GQL8; spf=pass (imf01.hostedemail.com: domain of shakeel.butt@linux.dev designates 95.215.58.135 as permitted sender) smtp.mailfrom=shakeel.butt@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1788363429; b=MyPd3mNq+S5XQLfZIJjBv/2aHnrR9KElFxhS4TIb5qhZ3a5Tu8pkIz0zxUNlXr5ruQtGnb Ra5JpTOyt1MkbFzLXLynBbl63va1yjLUx6EyFBjVUPknAgm6EHbIiOdOJoQ+ZNj7sQdVLO 9RLwDTxVjVjZk4IaWaH/++NTg8Qonok= ARC-Authentication-Results: i=1; imf01.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=a7q4GQL8; spf=pass (imf01.hostedemail.com: domain of shakeel.butt@linux.dev designates 95.215.58.135 as permitted sender) smtp.mailfrom=shakeel.butt@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1788363429; 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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=6YDT7xYE1cCIwsjCMbh5Krgj879TdKL/o0OhLi6/Vxw=; b=hFpkTBxwvb4vXKh7RNuLA9WD4UIs99Rop4y70vA9uJ82nDVMLfHeDa5akxLCeLLKEsK6F4 mLAgvf93SsFTiOIrhKls1mu/7kqS0ZrGgGfOhbjvtYuYFb/uOxIDV9h6TY4O/Aj9KqW/pY b/OPSboQLYVptznoKFj0/J/15L+6mww= X-Envelope-To: linux-mm@kvack.org DKIM-Signature: a=rsa-sha256; bh=es/Uhjm8/c1u5ug4tjOA3nWWmmojdUXhgoapLjGTZa4=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1788363427; v=1; x=1788968227; b=a7q4GQL8xiDQwqXLM6Un6pDy1Sd5mVjnfuVQ2Jjcco3TvjqpE3EvWmUDFhI03fxUAhcHFjKt XLJgus0CHdSsvQ40iZRg3cRGBSK10pne+6PkfUaOhnRfnHrRAG1LqXfNm8XXUROf+vYgsUjeAjE Y1aMXzpvzR3geMDPWxFTC5dQ= X-Envelope-To: linux-mm@kvack.org Received: by smtp.migadu.com with ESMTPS id e468d896e5d8b7d1; Wed, 02 Sep 2026 15:37:07 +0000 X-Mizu-Trace-ID: e468d896e5d8b7d1 X-Migadu-Flow: FLOW_OUT Date: Wed, 2 Sep 2026 08:37:03 -0700 From: Shakeel Butt To: Kefeng Wang Cc: brauner@kernel.org, djwong@kernel.org, cem@kernel.org, akpm@linux-foundation.org, vbabka@kernel.org, surenb@google.com, mhocko@suse.com, brendan.jackman@linux.dev, hannes@cmpxchg.org, ziy@nvidia.com, david@kernel.org, qi.zheng@linux.dev, ljs@kernel.org, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 4/4] mm: replace PF_KCOMPACTD flag with kthread_func() check Message-ID: References: <20260902131653.1338227-1-wangkefeng.wang@huawei.com> <20260902131653.1338227-5-wangkefeng.wang@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260902131653.1338227-5-wangkefeng.wang@huawei.com> X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: ADF2A40006 X-Stat-Signature: iud5hitw6omnrue46os8rjnzcfre3ung X-Rspam-User: X-HE-Tag: 1788363428-928082 X-HE-Meta: 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 1wTxf1IF ovHJ+8swC0ahudlk/NbZBQFii/onwq+kLnzvg1JNfA8cI8ITPFVQyAi73W+G5+Fcu0Fvmx3AaPXSUSYpucq0N5JOBGXd3wom0+Br8YnCHnrPHHHdgM91e/nNXjoH+l1cfvCsgiDh/nfM22bhuyyuw8wdh6ZvSr0c+nMbM3eUIsmm2SMuYMKw7OFGWxdfwqjBzHn7wh9KmTYlKQaDKyPewumiWMsqOmlvTFSETxxgHMPgo3/+XJVbuoK9ksdhZdQ3g4N/E0rO4pK3hzG4CFklB7sXlC2wr9KrI1v6PJrAtPUoUEDFeZP0nHWVbpX8Xt6wud9aHRx0ycTPc8ltt4Jzj0ak8PA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Sep 02, 2026 at 09:16:53PM +0800, Kefeng Wang wrote: > PF_KCOMPACTD was introduced by commit ce6d9c1c2b5c ("NFS: fix > nfs_release_folio() to not deadlock via kcompactd writeback") so > nfs_release_folio() could detect kcompactd context and skip > writeback. The flag is only consumed by current_is_kcompactd(), > whose sole caller is nfs_release_folio(). > > Replace the flag-based check with kthread_func(current) == kcompactd, > freeing the 0x00010000 PF flag bit. > > Signed-off-by: Kefeng Wang Acked-by: Shakeel Butt