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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2023-09-14 18:00:07 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-10-04 20:32:28 +0300 |
| commit | 775d9b10530a0a303dc08a9cdb2ed1f8667d9c5f (patch) | |
| tree | 157362cfc271d97a451dafe0fbee9d3dc1467fb3 /fs/buffer.c | |
| parent | e509ad4d77e6c8852f082104e388110d16fdfb97 (diff) | |
| download | linux-775d9b10530a0a303dc08a9cdb2ed1f8667d9c5f.tar.xz | |
buffer: use bdev_getblk() to avoid memory reclaim in readahead path
__getblk() adds __GFP_NOFAIL, which is unnecessary for readahead; we're
quite comfortable with the possibility that we may not get a bh back.
Switch to bdev_getblk() which does not include __GFP_NOFAIL.
Link: https://lkml.kernel.org/r/20230914150011.843330-5-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Hui Zhu <teawater@antgroup.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'fs/buffer.c')
| -rw-r--r-- | fs/buffer.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/buffer.c b/fs/buffer.c index 80e96c1fcd33..edd118594565 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -1465,7 +1465,9 @@ EXPORT_SYMBOL(__getblk_gfp); */ void __breadahead(struct block_device *bdev, sector_t block, unsigned size) { - struct buffer_head *bh = __getblk(bdev, block, size); + struct buffer_head *bh = bdev_getblk(bdev, block, size, + GFP_NOWAIT | __GFP_MOVABLE); + if (likely(bh)) { bh_readahead(bh, REQ_RAHEAD); brelse(bh); |