From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 C6EFE471246; Thu, 10 Sep 2026 11:57:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789041454; cv=none; b=fNRS9tVpCX51W6wxYTIkBXX4XXFiQABgBbnApiFg45/22OFltySbxQMHcW/vo4D7GLSuEOaDHER0z/Gl14C/qU1ecOhf6YI/6Ozx3CdvF6hcW1fEDLz2szSN+ZTICcWju0MPQScYE0LWBpEyzUXWfHyjh141oQKdL+X+vYnP4qU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789041454; c=relaxed/simple; bh=t4NoV1gAg0tnNAU/7rvY+icOWw6B3xrfZIy/AWdSz9M=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=V4EtKtjA3XorfTxL/Q4HcVXQjkH2LrV9ZOUy0crwBDhgqMFJ2EE69idlnX3FAyoHb58hqmZeZR8B+U8sTwdmSeafvE1LTuPNlcx/NDH90j82g8E6kiWmpEEzBQVeAJY6/qaaxUr3XGU3bpCh93sqhLZgUP7jNa6A6SiVpn57Op8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=iZL9wiLq; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="iZL9wiLq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6887B1F000FF; Thu, 10 Sep 2026 11:57:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789041453; bh=Mgh8waXa9eS3cTcLGuswtFpFRzduf+4/BpkuuXgbHnc=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=iZL9wiLq7AUskmc+WJh3qzBBsQ6sONeIgaI+0RRAYtyX30gteNdyL/GReVBlp2E+w CKU7Q+TiwPuC7pH/4qxX7FlUkR9AvQcli5bW5zgIUwUp9N+Jw/P2PT0w4Wb6YBvoFY CgKs3QiX7/D5mq3BI/w+ndqMCRV8yFtHM/X3J5XYo04Tt5TR3FINWBtQ1vJQ1GdgOc sD6/MAq/GoFWVSgI6IdMVSoadiOf8r9CVghoUO8jBT4Xndj+Orx12FlBYtQa9yAvn/ Fhqr7P9vAGUE1dm46VrkqKPXlrJiDgKympDAHwhFDG5Dx9L+gIZHy38en6b11YFraW 5B+kn8i4wBKgQ== Message-ID: <561b379d-7ab3-4f78-94d9-7a056c5ddb1c@kernel.org> Date: Thu, 10 Sep 2026 13:57:26 +0200 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 4/4] mm: replace PF_KCOMPACTD flag with kthread_func() check To: Kefeng Wang , 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, qi.zheng@linux.dev, shakeel.butt@linux.dev, ljs@kernel.org Cc: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org References: <20260902131653.1338227-1-wangkefeng.wang@huawei.com> <20260902131653.1338227-5-wangkefeng.wang@huawei.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 9/2/26 15:16, 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 > --- Reviewed-by: David Hildenbrand (Arm) -- Cheers, David