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block: use an on-stack bio in blkdev_issue_flush

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There is no point in allocating memory for a synchronous flush.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Acked-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-01-26 15:52:35 +01:00 • committed by Jens Axboe
parent 3175199ab0
commit c6bf3f0e25
23 changed files with 33 additions and 38 deletions
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4
fs/ext4/fast_commit.c
View file

@ -1076,7 +1076,7 @@ static int ext4_fc_perform_commit(journal_t *journal)
* flush before we start writing fast commit blocks.
*/
if (journal->j_fs_dev != journal->j_dev)
blkdev_issue_flush(journal->j_fs_dev, GFP_NOFS);
blkdev_issue_flush(journal->j_fs_dev);
blk_start_plug(&plug);
if (sbi->s_fc_bytes == 0) {
@ -1535,7 +1535,7 @@ static int ext4_fc_replay_inode(struct super_block *sb, struct ext4_fc_tl *tl)
out:
iput(inode);
if (!ret)
blkdev_issue_flush(sb->s_bdev, GFP_KERNEL);
blkdev_issue_flush(sb->s_bdev);
return 0;
}