[PATCH v3 4/5] f2fs: guard blkdev_zone_mgmt with nofs scope

Johannes Thumshirn
2024-01-29T07:52:41Z

Guard the calls to blkdev_zone_mgmt() with a memalloc_nofs scope.
This helps us getting rid of the GFP_NOFS argument to blkdev_zone_mgmt();

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
---
fs/f2fs/segment.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 4c8836ded90f..0094fe491364 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1971,9 +1971,15 @@ static int __f2fs_issue_discard_zone(struct f2fs_sb_info *sbi,
}

if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) {
+ unsigned int nofs_flags;
+ int ret;
+
trace_f2fs_issue_reset_zone(bdev, blkstart);
- return blkdev_zone_mgmt(bdev, REQ_OP_ZONE_RESET,
- sector, nr_sects, GFP_NOFS);
+ nofs_flags = memalloc_nofs_save();
+ ret = blkdev_zone_mgmt(bdev, REQ_OP_ZONE_RESET,
+ sector, nr_sects, GFP_KERNEL);
+ memalloc_nofs_restore(nofs_flags);
+ return ret;
}

__queue_zone_reset_cmd(sbi, bdev, blkstart, lblkstart, blklen);
@@ -4865,6 +4871,7 @@ static int check_zone_write_pointer(struct f2fs_sb_info *sbi,
block_t zone_block, valid_block_cnt;
unsigned int log_sectors_per_block = sbi->log_blocksize - SECTOR_SHIFT;
int ret;
+ unsigned int nofs_flags;

if (zone->type != BLK_ZONE_TYPE_SEQWRITE_REQ)
return 0;
@@ -4912,8 +4919,10 @@ static int check_zone_write_pointer(struct f2fs_sb_info *sbi,
"pointer: valid block[0x%x,0x%x] cond[0x%x]",
zone_segno, valid_block_cnt, zone->cond);

+ nofs_flags = memalloc_nofs_save();
ret = blkdev_zone_mgmt(fdev->bdev, REQ_OP_ZONE_FINISH,
- zone->start, zone->len, GFP_NOFS);
+ zone->start, zone->len, GFP_KERNEL);
+ memalloc_nofs_restore(nofs_flags);
if (ret == -EOPNOTSUPP) {
ret = blkdev_issue_zeroout(fdev->bdev, zone->wp,
zone->len - (zone->wp - zone->start),

--
2.43.0