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 A1CB44A5EA8; Wed, 2 Sep 2026 16:36:21 +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=1788366983; cv=none; b=r4L1rFWGejP5OXhz5nx96lec+O2XAPgebjZkKlBa0ypYDJq9DXSJRy5O7wz1J8d5tSaYGl3ap6GM8LUWnh24b4Icnx3qc/87QkNnIEXwCPBcn6Fvg4CElxQFAu8v/sIb3zbhmaEQEPXtiAVCFOk2FsRWPCk2RgOwVvTXpfH6+WE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788366983; c=relaxed/simple; bh=j5dyCZzGZXhc8sCrjRwlYOrRtSy0ib5mtj3XnDYvKWI=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Ytj8dwgbM2nWN7nqoQ7YWCWfUpoBJh2eAS7qraN+//IIFtUX5DDMYZZj+cFN217nZQrykRtRJX8wmAt/ZYJQX8jA7oxx2Xr9aI+Uvk69v8huPwv+g3yrrHb2bS3xEOqRk/yi5BfOMeh/Zt+0H3VOIoA+v7a0oKOqp3RYV86c2M8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Te8Jy+zU; 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="Te8Jy+zU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 05A3E1F000E9; Wed, 2 Sep 2026 16:36:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788366981; bh=X9qWhK86vAI0vw7PjTHIwO4q0yPRh2De+EC1ifXqR+I=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=Te8Jy+zUvZ0hd3XPvJweck6BpFfsKl4b97KSDSeiEwaoxE8x281Ees0rBoToIajjE VaBnjFMzSefJGYmXbhUagIcNzPwWXHZIbhu5C1r9Nz6l97tYk8i5D8i30945uNkD+/ N6uO+Jz651ZEyyf9kDC9lkHkuN/W8Dzrvu34NsDPALyCF1jTmSc8IaagV0zXrh8YqM SG9dUmXPNncJ+LMw6rlHX6DWA5kWD+JN884AXB2TAuJEGk7mQcGfMBBltHfReDw+6L C5vMZb/dARDxGVaFxBZnGQuxfEXA+uvI04JxDzmZtlLjInnxlOv5Msta+IqaZbOts0 jKL8IRkjqT2rg== Message-ID: Date: Wed, 2 Sep 2026 18:36:16 +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 Content-Language: en-US To: Kefeng Wang , brauner@kernel.org, djwong@kernel.org, cem@kernel.org, akpm@linux-foundation.org, surenb@google.com, mhocko@suse.com, brendan.jackman@linux.dev, hannes@cmpxchg.org, ziy@nvidia.com, david@kernel.org, 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: "Vlastimil Babka (SUSE)" Autocrypt: addr=vbabka@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 Acked-by: Vlastimil Babka (SUSE)