linux-kernel - [PATCH v2 1/5] zonefs: pass GFP_KERNEL to blkdev_zone

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Message-Id: <20240125-zonefs_nofs-v2-1-2d975c8c1690@wdc.com>
Date: Thu, 25 Jan 2024 08:53:24 -0800
From: Johannes Thumshirn <johannes.thumshirn@....com>
To: Damien Le Moal <dlemoal@...nel.org>, 
 Naohiro Aota <naohiro.aota@....com>, Johannes Thumshirn <jth@...nel.org>, 
 Alasdair Kergon <agk@...hat.com>, Mike Snitzer <snitzer@...nel.org>, 
 Mikulas Patocka <mpatocka@...hat.com>, dm-devel@...ts.linux.dev, 
 Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>, 
 David Sterba <dsterba@...e.com>, Jaegeuk Kim <jaegeuk@...nel.org>, 
 Chao Yu <chao@...nel.org>, Jens Axboe <axboe@...nel.dk>, 
 Christoph Hellwig <hch@....de>, Sagi Grimberg <sagi@...mberg.me>, 
 Chaitanya Kulkarni <kch@...dia.com>
Cc: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-btrfs@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net, 
 linux-block@...r.kernel.org, linux-nvme@...ts.infradead.org, 
 Johannes Thumshirn <johannes.thumshirn@....com>
Subject: [PATCH v2 1/5] zonefs: pass GFP_KERNEL to blkdev_zone_mgmt() call

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.

Link: https://lore.kernel.org/all/ZZcgXI46AinlcBDP@casper.infradead.org/
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@....com>
---
 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",

-- 
2.43.0