From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 868031A38DB for ; Sat, 23 Mar 2024 02:11:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711159887; cv=none; b=n7+ZrcfUlQZ36Te2K5JQTRgOLzDOcr+jnVQjU9iJuKG8CoMy4fzU7ERBvfKmY76nA5pJdLsRftYc5sm7XrvFddfPCZdYQerzAnFWnkJG6MwiilLwlIjsZJZo5kicOeqtecsbEER2Rre400p6FRNukg8ceCwTQHEjGzaCwF/b+7A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711159887; c=relaxed/simple; bh=AZBuJoYGPORqk3ClXZRSdCW5KtfizlTcBSYe7IFEB1I=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=fIqyxv64LajyvmQ47EVAyNnuoemaVAAaIaKv0IUWUdRnhOeT76ScnK/ZHKQpmOlUM9hoW9ECEJwyuPI/SuYSijTMH7+9UKo0fvCAIGJpT0QAO6nBAuUz2wXB8hNy/h6IsabX7ybvhGGlW3G+mn1rNAL9CExxUQKFYLjPdX9sguo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WfaNECkT; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="WfaNECkT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AF7D1C433C7; Sat, 23 Mar 2024 02:11:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711159887; bh=AZBuJoYGPORqk3ClXZRSdCW5KtfizlTcBSYe7IFEB1I=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=WfaNECkTCDZL3Jf6XPGJLufCwt8BdrBIMGjIGmAxMVEZY0no25EfwG++MMM6XCMcJ fecGmXOc+pLwIwD492yWTjFZDSVVrX9uHYDW4PPgEz9uhMGySeDy9wHP3zWSb0+0u0 /L/zcnOS4hEnsXKwlrcksXaGIJrq7cAUEhnfeum+Nt5duowwqg7USk/5NDzZAIwJ4N ipGaU5S+0ZIpANgK9jsy2PFka60xEx4vIaCh3FV0nohUzwjzfE67AOONqbnPwjih2B 11SAuSnuOh9L5kJPaRREKjrM0VPlwBYUzIMo8cJdklw3dwRsNbKZvlc/cfjCdnGW56 tQ0LwxqgU6X4g== Message-ID: <89414a3a-5d1a-45d3-a00b-199fa3d3ca78@kernel.org> Date: Sat, 23 Mar 2024 10:11:26 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] f2fs: Prevent s_writer rw_sem count mismatch in f2fs_evict_inode Content-Language: en-US To: Yeongjin Gil , jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Sungjong Seo , Sunmin Jeong References: <20240322041639.23144-1-youngjin.gil@samsung.com> From: Chao Yu Autocrypt: addr=chao@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 2024/3/22 12:16, Yeongjin Gil wrote: > If f2fs_evict_inode is called between freeze_super and thaw_super, the > s_writer rwsem count may become negative, resulting in hang. > > CPU1 CPU2 > > f2fs_resize_fs() f2fs_evict_inode() > f2fs_freeze > set SBI_IS_FREEZING > skip sb_start_intwrite > f2fs_unfreeze > clear SBI_IS_FREEZING > sb_end_intwrite > > To solve this problem, the call to sb_end_write is determined by whether > sb_start_intwrite is called, rather than the current freezing status. > > Reviewed-by: Sungjong Seo > Reviewed-by: Sunmin Jeong > Signed-off-by: Yeongjin Gil Reviewed-by: Chao Yu Thanks,