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 B431A15B10E; Mon, 29 Jan 2024 23:25:35 +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=1706570735; cv=none; b=DdGFcFaSitVg0CFk1TaD9guK6jweLdmXjkDGBuyi6bQF7XRzc4bbghVD5wvFdzOfDcbeDeOU3IYOKuAS1Bo1DGSUf/k+qZrdEnGXk4xYzTQPuxyFT9wDQdzZsYgpTVc6xHQ0sX9THB+pySKNoNoAY7K+10f0j7dFBdRkgp2VVtQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706570735; c=relaxed/simple; bh=rlXD8wrR7LGaE3yPipo4oss7yBMRHRL+ZqlHjIj2kt4=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=R51wLmC5sbzyflpHWnnkqyZWC3VVXbPufEobH8x+9Zm1VjLsD0dwTTKBrSnWFAFfzGwQSromofgG00iQJ9TSJh0RNN5uqgEXBZ7JDVplM3ZxVCF1ct2C08cUVQt0pNdM4zO3mqjhPz0xrYFmN+OV/AYYxhe7ByF8T9vFSj/+Mfg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bm5vgGd8; 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="bm5vgGd8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7A4E9C433F1; Mon, 29 Jan 2024 23:25:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1706570735; bh=rlXD8wrR7LGaE3yPipo4oss7yBMRHRL+ZqlHjIj2kt4=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=bm5vgGd8iLgqVAS89ky5CprUejORrrO+L2Fm2jCGiGp9VUCRfnTu3zsHrnPsqtld/ GxZX0GpHfKiJtELlkp//qvfy+Iumzg2up1xNCtSSH96om1ftwi/oHPyzuNe8oZQdPS FVh7JCk3yR8dHonw8oFafOdyX2eu5cEadJF1NwFhWQTA3YD9WIjfeTfBKqWjttbUp2 yZwdUq0oPF2A/f8W0vp7FkRZXx5Sc+i3DX+NXwp/mcouZV/6Az6J2ugDuWlE9EDosr LuWkKwPhPn4vaMObQ6+6Y8YPEZepYVK7x5GzIQFzGSW6U4iJcePs0HWzVO/oxRMOUT m5ciZiseX3ZIQ== Message-ID: <6f0aed31-b9a9-4655-9c8c-839f978b40d9@kernel.org> Date: Tue, 30 Jan 2024 08:25:31 +0900 Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/5] zonefs: pass GFP_KERNEL to blkdev_zone_mgmt() call Content-Language: en-US To: Johannes Thumshirn , Naohiro Aota , Johannes Thumshirn , Alasdair Kergon , Mike Snitzer , Mikulas Patocka , dm-devel@lists.linux.dev, Chris Mason , Josef Bacik , David Sterba , Jaegeuk Kim , Chao Yu , Jens Axboe , Christoph Hellwig , Sagi Grimberg , Chaitanya Kulkarni Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org References: <20240128-zonefs_nofs-v3-0-ae3b7c8def61@wdc.com> <20240128-zonefs_nofs-v3-1-ae3b7c8def61@wdc.com> From: Damien Le Moal Organization: Western Digital Research In-Reply-To: <20240128-zonefs_nofs-v3-1-ae3b7c8def61@wdc.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 1/29/24 16:52, Johannes Thumshirn wrote: > Pass GFP_KERNEL instead of GFP_NOFS to the blkdev_zone_mgmt() call in > zonefs_zone_mgmt(). > > As as zonefs_zone_mgmt() and zonefs_inode_zone_mgmt() are never called > from a place that can recurse back into the filesystem on memory reclaim, > it is save to call blkdev_zone_mgmt() with GFP_KERNEL. s/save/safe > Link: https://lore.kernel.org/all/ZZcgXI46AinlcBDP@casper.infradead.org/ > Signed-off-by: Johannes Thumshirn > --- > fs/zonefs/super.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c > index 93971742613a..63fbac018c04 100644 > --- a/fs/zonefs/super.c > +++ b/fs/zonefs/super.c > @@ -113,7 +113,7 @@ static int zonefs_zone_mgmt(struct super_block *sb, > > trace_zonefs_zone_mgmt(sb, z, op); > ret = blkdev_zone_mgmt(sb->s_bdev, op, z->z_sector, > - z->z_size >> SECTOR_SHIFT, GFP_NOFS); > + z->z_size >> SECTOR_SHIFT, GFP_KERNEL); > if (ret) { > zonefs_err(sb, > "Zone management operation %s at %llu failed %d\n", I think this is OK but I will need a little more time to fully convince myself. So let me look again at the code to check all the calls contexts. -- Damien Le Moal Western Digital Research