From 4d09d75d8b8cb3c8087b46585924777bc8737663 Mon Sep 17 00:00:00 2001 From: Qi Zheng Date: Mon, 11 Sep 2023 17:44:29 +0800 Subject: ext4: dynamically allocate the ext4-es shrinker In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the ext4-es shrinker, so that it can be freed asynchronously via RCU. Then it doesn't need to wait for RCU read-side critical section when releasing the struct ext4_sb_info. Link: https://lkml.kernel.org/r/20230911094444.68966-31-zhengqi.arch@bytedance.com Signed-off-by: Qi Zheng Reviewed-by: Muchun Song Cc: "Theodore Ts'o" Cc: Andreas Dilger Cc: Abhinav Kumar Cc: Alasdair Kergon Cc: Alexander Viro Cc: Alyssa Rosenzweig Cc: Andreas Gruenbacher Cc: Anna Schumaker Cc: Arnd Bergmann Cc: Bob Peterson Cc: Borislav Petkov Cc: Carlos Llamas Cc: Chandan Babu R Cc: Chao Yu Cc: Chris Mason Cc: Christian Brauner Cc: Christian Koenig Cc: Chuck Lever Cc: Coly Li Cc: Dai Ngo Cc: Daniel Vetter Cc: Daniel Vetter Cc: "Darrick J. Wong" Cc: Dave Chinner Cc: Dave Hansen Cc: David Airlie Cc: David Hildenbrand Cc: David Sterba Cc: Dmitry Baryshkov Cc: Gao Xiang Cc: Greg Kroah-Hartman Cc: Huang Rui Cc: Ingo Molnar Cc: Jaegeuk Kim Cc: Jani Nikula Cc: Jan Kara Cc: Jason Wang Cc: Jeff Layton Cc: Jeffle Xu Cc: Joel Fernandes (Google) Cc: Joonas Lahtinen Cc: Josef Bacik Cc: Juergen Gross Cc: Kent Overstreet Cc: Kirill Tkhai Cc: Marijn Suijten Cc: "Michael S. Tsirkin" Cc: Mike Snitzer Cc: Minchan Kim Cc: Muchun Song Cc: Nadav Amit Cc: Neil Brown Cc: Oleksandr Tyshchenko Cc: Olga Kornievskaia Cc: Paul E. McKenney Cc: Richard Weinberger Cc: Rob Clark Cc: Rob Herring Cc: Rodrigo Vivi Cc: Roman Gushchin Cc: Sean Paul Cc: Sergey Senozhatsky Cc: Song Liu Cc: Stefano Stabellini Cc: Steven Price Cc: Thomas Gleixner Cc: Tomeu Vizoso Cc: Tom Talpey Cc: Trond Myklebust Cc: Tvrtko Ursulin Cc: Vlastimil Babka Cc: Xuan Zhuo Cc: Yue Hu Signed-off-by: Andrew Morton --- fs/ext4/ext4.h | 2 +- fs/ext4/extents_status.c | 23 +++++++++++++---------- 2 files changed, 14 insertions(+), 11 deletions(-) (limited to 'fs/ext4') diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 9418359b1d9d..8eeff770992c 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1653,7 +1653,7 @@ struct ext4_sb_info { __u32 s_csum_seed; /* Reclaim extents from extent status tree */ - struct shrinker s_es_shrinker; + struct shrinker *s_es_shrinker; struct list_head s_es_list; /* List of inodes with reclaimable extents */ long s_es_nr_inode; struct ext4_es_stats s_es_stats; diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c index 6f7de14c0fa8..deec7d1f4e50 100644 --- a/fs/ext4/extents_status.c +++ b/fs/ext4/extents_status.c @@ -1606,7 +1606,7 @@ static unsigned long ext4_es_count(struct shrinker *shrink, unsigned long nr; struct ext4_sb_info *sbi; - sbi = container_of(shrink, struct ext4_sb_info, s_es_shrinker); + sbi = shrink->private_data; nr = percpu_counter_read_positive(&sbi->s_es_stats.es_stats_shk_cnt); trace_ext4_es_shrink_count(sbi->s_sb, sc->nr_to_scan, nr); return nr; @@ -1615,8 +1615,7 @@ static unsigned long ext4_es_count(struct shrinker *shrink, static unsigned long ext4_es_scan(struct shrinker *shrink, struct shrink_control *sc) { - struct ext4_sb_info *sbi = container_of(shrink, - struct ext4_sb_info, s_es_shrinker); + struct ext4_sb_info *sbi = shrink->private_data; int nr_to_scan = sc->nr_to_scan; int ret, nr_shrunk; @@ -1700,13 +1699,17 @@ int ext4_es_register_shrinker(struct ext4_sb_info *sbi) if (err) goto err3; - sbi->s_es_shrinker.scan_objects = ext4_es_scan; - sbi->s_es_shrinker.count_objects = ext4_es_count; - sbi->s_es_shrinker.seeks = DEFAULT_SEEKS; - err = register_shrinker(&sbi->s_es_shrinker, "ext4-es:%s", - sbi->s_sb->s_id); - if (err) + sbi->s_es_shrinker = shrinker_alloc(0, "ext4-es:%s", sbi->s_sb->s_id); + if (!sbi->s_es_shrinker) { + err = -ENOMEM; goto err4; + } + + sbi->s_es_shrinker->scan_objects = ext4_es_scan; + sbi->s_es_shrinker->count_objects = ext4_es_count; + sbi->s_es_shrinker->private_data = sbi; + + shrinker_register(sbi->s_es_shrinker); return 0; err4: @@ -1726,7 +1729,7 @@ void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi) percpu_counter_destroy(&sbi->s_es_stats.es_stats_cache_misses); percpu_counter_destroy(&sbi->s_es_stats.es_stats_all_cnt); percpu_counter_destroy(&sbi->s_es_stats.es_stats_shk_cnt); - unregister_shrinker(&sbi->s_es_shrinker); + shrinker_free(sbi->s_es_shrinker); } /* -- cgit v1.2.3 From e509ad4d77e6c8852f082104e388110d16fdfb97 Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Thu, 14 Sep 2023 16:00:06 +0100 Subject: ext4: use bdev_getblk() to avoid memory reclaim in readahead path sb_getblk_gfp 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/20230914150011.843330-4-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Reported-by: Hui Zhu Closes: https://lore.kernel.org/linux-fsdevel/20230811035705.3296-1-teawaterz@linux.alibaba.com/ Signed-off-by: Andrew Morton --- fs/ext4/super.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'fs/ext4') diff --git a/fs/ext4/super.c b/fs/ext4/super.c index dbebd8b3127e..268d812b0add 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -255,7 +255,8 @@ struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) { - struct buffer_head *bh = sb_getblk_gfp(sb, block, 0); + struct buffer_head *bh = bdev_getblk(sb->s_bdev, block, + sb->s_blocksize, GFP_NOWAIT); if (likely(bh)) { if (trylock_buffer(bh)) -- cgit v1.2.3 From 8a83ac54940d27b8f56d766e1cb270d150fedd50 Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Thu, 14 Sep 2023 16:00:10 +0100 Subject: ext4: call bdev_getblk() from sb_getblk_gfp() Most of the callers of sb_getblk_gfp() already assumed that they were passing the entire GFP flags to use. Fix up the two callers that didn't, and remove the __GFP_NOFAIL from them since they both appear to correctly handle failure. Link: https://lkml.kernel.org/r/20230914150011.843330-8-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Cc: Hui Zhu Signed-off-by: Andrew Morton --- fs/ext4/super.c | 10 ++++++++-- include/linux/buffer_head.h | 6 +++--- 2 files changed, 11 insertions(+), 5 deletions(-) (limited to 'fs/ext4') diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 268d812b0add..c00ec159dea5 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -244,13 +244,19 @@ static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb, struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block, blk_opf_t op_flags) { - return __ext4_sb_bread_gfp(sb, block, op_flags, __GFP_MOVABLE); + gfp_t gfp = mapping_gfp_constraint(sb->s_bdev->bd_inode->i_mapping, + ~__GFP_FS) | __GFP_MOVABLE; + + return __ext4_sb_bread_gfp(sb, block, op_flags, gfp); } struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, sector_t block) { - return __ext4_sb_bread_gfp(sb, block, 0, 0); + gfp_t gfp = mapping_gfp_constraint(sb->s_bdev->bd_inode->i_mapping, + ~__GFP_FS); + + return __ext4_sb_bread_gfp(sb, block, 0, gfp); } void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index b294e2cccbae..22f13eece719 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -368,10 +368,10 @@ static inline struct buffer_head *sb_getblk(struct super_block *sb, return __getblk(sb->s_bdev, block, sb->s_blocksize); } -static inline struct buffer_head * -sb_getblk_gfp(struct super_block *sb, sector_t block, gfp_t gfp) +static inline struct buffer_head *sb_getblk_gfp(struct super_block *sb, + sector_t block, gfp_t gfp) { - return __getblk_gfp(sb->s_bdev, block, sb->s_blocksize, gfp); + return bdev_getblk(sb->s_bdev, block, sb->s_blocksize, gfp); } static inline struct buffer_head * -- cgit v1.2.3 From f8174a1181220d24d6b4332216112318f5905729 Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Wed, 4 Oct 2023 17:53:04 +0100 Subject: ext4: use folio_end_read() folio_end_read() is the perfect fit for ext4. Link: https://lkml.kernel.org/r/20231004165317.1061855-5-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Cc: Albert Ou Cc: Alexander Gordeev Cc: Andreas Dilger Cc: Christian Borntraeger Cc: Christophe Leroy Cc: Geert Uytterhoeven Cc: Heiko Carstens Cc: Ivan Kokshaysky Cc: Matt Turner Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Richard Henderson Cc: Sven Schnelle Cc: "Theodore Ts'o" Cc: Thomas Bogendoerfer Cc: Vasily Gorbik Signed-off-by: Andrew Morton --- fs/ext4/readpage.c | 14 +++----------- 1 file changed, 3 insertions(+), 11 deletions(-) (limited to 'fs/ext4') diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c index 3e7d160f543f..21e8f0aebb3c 100644 --- a/fs/ext4/readpage.c +++ b/fs/ext4/readpage.c @@ -70,15 +70,8 @@ static void __read_end_io(struct bio *bio) { struct folio_iter fi; - bio_for_each_folio_all(fi, bio) { - struct folio *folio = fi.folio; - - if (bio->bi_status) - folio_clear_uptodate(folio); - else - folio_mark_uptodate(folio); - folio_unlock(folio); - } + bio_for_each_folio_all(fi, bio) + folio_end_read(fi.folio, bio->bi_status == 0); if (bio->bi_private) mempool_free(bio->bi_private, bio_post_read_ctx_pool); bio_put(bio); @@ -336,8 +329,7 @@ int ext4_mpage_readpages(struct inode *inode, if (ext4_need_verity(inode, folio->index) && !fsverity_verify_folio(folio)) goto set_error_page; - folio_mark_uptodate(folio); - folio_unlock(folio); + folio_end_read(folio, true); continue; } } else if (fully_mapped) { -- cgit v1.2.3 From d4059993674b533798a551859042957bb5578332 Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Mon, 16 Oct 2023 21:10:51 +0100 Subject: ext4: convert to folio_create_empty_buffers Remove an unnecessary folio->page->folio conversion and take advantage of the new return value from folio_create_empty_buffers(). Link: https://lkml.kernel.org/r/20231016201114.1928083-5-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Pankaj Raghav Cc: Andreas Gruenbacher Cc: Ryusuke Konishi Signed-off-by: Andrew Morton --- fs/ext4/inode.c | 14 +++++--------- fs/ext4/move_extent.c | 11 +++++------ 2 files changed, 10 insertions(+), 15 deletions(-) (limited to 'fs/ext4') diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 4ce35f1c8b0a..8e431ff2fd95 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1020,10 +1020,8 @@ static int ext4_block_write_begin(struct folio *folio, loff_t pos, unsigned len, BUG_ON(from > to); head = folio_buffers(folio); - if (!head) { - create_empty_buffers(&folio->page, blocksize, 0); - head = folio_buffers(folio); - } + if (!head) + head = folio_create_empty_buffers(folio, blocksize, 0); bbits = ilog2(blocksize); block = (sector_t)folio->index << (PAGE_SHIFT - bbits); @@ -1153,7 +1151,7 @@ retry_grab: * starting the handle. */ if (!folio_buffers(folio)) - create_empty_buffers(&folio->page, inode->i_sb->s_blocksize, 0); + folio_create_empty_buffers(folio, inode->i_sb->s_blocksize, 0); folio_unlock(folio); @@ -3643,10 +3641,8 @@ static int __ext4_block_zero_page_range(handle_t *handle, iblock = index << (PAGE_SHIFT - inode->i_sb->s_blocksize_bits); bh = folio_buffers(folio); - if (!bh) { - create_empty_buffers(&folio->page, blocksize, 0); - bh = folio_buffers(folio); - } + if (!bh) + bh = folio_create_empty_buffers(folio, blocksize, 0); /* Find the buffer that contains "offset" */ pos = blocksize; diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c index 18a9e7c47975..7fe448fb948b 100644 --- a/fs/ext4/move_extent.c +++ b/fs/ext4/move_extent.c @@ -183,10 +183,8 @@ mext_page_mkuptodate(struct folio *folio, unsigned from, unsigned to) blocksize = i_blocksize(inode); head = folio_buffers(folio); - if (!head) { - create_empty_buffers(&folio->page, blocksize, 0); - head = folio_buffers(folio); - } + if (!head) + head = folio_create_empty_buffers(folio, blocksize, 0); block = (sector_t)folio->index << (PAGE_SHIFT - inode->i_blkbits); for (bh = head, block_start = 0; bh != head || !block_start; @@ -380,9 +378,10 @@ data_copy: } /* Perform all necessary steps similar write_begin()/write_end() * but keeping in mind that i_size will not change */ - if (!folio_buffers(folio[0])) - create_empty_buffers(&folio[0]->page, 1 << orig_inode->i_blkbits, 0); bh = folio_buffers(folio[0]); + if (!bh) + bh = folio_create_empty_buffers(folio[0], + 1 << orig_inode->i_blkbits, 0); for (i = 0; i < data_offset_in_page; i++) bh = bh->b_this_page; for (i = 0; i < block_len_in_page; i++) { -- cgit v1.2.3 From 0a88810d9b76e6ecfd234f5728e27344a39e3ff8 Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Mon, 16 Oct 2023 21:11:14 +0100 Subject: buffer: remove folio_create_empty_buffers() With all users converted, remove the old create_empty_buffers() and rename folio_create_empty_buffers() to create_empty_buffers(). Link: https://lkml.kernel.org/r/20231016201114.1928083-28-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Cc: Andreas Gruenbacher Cc: Pankaj Raghav Cc: Ryusuke Konishi Signed-off-by: Andrew Morton --- fs/buffer.c | 13 +++---------- fs/ext4/inode.c | 6 +++--- fs/ext4/move_extent.c | 4 ++-- fs/gfs2/aops.c | 2 +- fs/gfs2/bmap.c | 2 +- fs/gfs2/meta_io.c | 2 +- fs/gfs2/quota.c | 2 +- fs/mpage.c | 2 +- fs/nilfs2/mdt.c | 2 +- fs/nilfs2/page.c | 4 ++-- fs/nilfs2/segment.c | 2 +- fs/ntfs/aops.c | 4 ++-- fs/ntfs/file.c | 2 +- fs/ntfs3/file.c | 2 +- fs/ocfs2/aops.c | 2 +- fs/reiserfs/inode.c | 2 +- fs/ufs/util.c | 2 +- include/linux/buffer_head.h | 4 +--- 18 files changed, 25 insertions(+), 34 deletions(-) (limited to 'fs/ext4') diff --git a/fs/buffer.c b/fs/buffer.c index bfa7604d1891..657a62bab73d 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -1641,7 +1641,7 @@ EXPORT_SYMBOL(block_invalidate_folio); * block_dirty_folio() via private_lock. try_to_free_buffers * is already excluded via the folio lock. */ -struct buffer_head *folio_create_empty_buffers(struct folio *folio, +struct buffer_head *create_empty_buffers(struct folio *folio, unsigned long blocksize, unsigned long b_state) { struct buffer_head *bh, *head, *tail; @@ -1672,13 +1672,6 @@ struct buffer_head *folio_create_empty_buffers(struct folio *folio, return head; } -EXPORT_SYMBOL(folio_create_empty_buffers); - -void create_empty_buffers(struct page *page, - unsigned long blocksize, unsigned long b_state) -{ - folio_create_empty_buffers(page_folio(page), blocksize, b_state); -} EXPORT_SYMBOL(create_empty_buffers); /** @@ -1778,7 +1771,7 @@ static struct buffer_head *folio_create_buffers(struct folio *folio, bh = folio_buffers(folio); if (!bh) - bh = folio_create_empty_buffers(folio, + bh = create_empty_buffers(folio, 1 << READ_ONCE(inode->i_blkbits), b_state); return bh; } @@ -2681,7 +2674,7 @@ int block_truncate_page(struct address_space *mapping, bh = folio_buffers(folio); if (!bh) - bh = folio_create_empty_buffers(folio, blocksize, 0); + bh = create_empty_buffers(folio, blocksize, 0); /* Find the buffer that contains "offset" */ offset = offset_in_folio(folio, from); diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 8e431ff2fd95..347fc8986e93 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1021,7 +1021,7 @@ static int ext4_block_write_begin(struct folio *folio, loff_t pos, unsigned len, head = folio_buffers(folio); if (!head) - head = folio_create_empty_buffers(folio, blocksize, 0); + head = create_empty_buffers(folio, blocksize, 0); bbits = ilog2(blocksize); block = (sector_t)folio->index << (PAGE_SHIFT - bbits); @@ -1151,7 +1151,7 @@ retry_grab: * starting the handle. */ if (!folio_buffers(folio)) - folio_create_empty_buffers(folio, inode->i_sb->s_blocksize, 0); + create_empty_buffers(folio, inode->i_sb->s_blocksize, 0); folio_unlock(folio); @@ -3642,7 +3642,7 @@ static int __ext4_block_zero_page_range(handle_t *handle, bh = folio_buffers(folio); if (!bh) - bh = folio_create_empty_buffers(folio, blocksize, 0); + bh = create_empty_buffers(folio, blocksize, 0); /* Find the buffer that contains "offset" */ pos = blocksize; diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c index 7fe448fb948b..3aa57376d9c2 100644 --- a/fs/ext4/move_extent.c +++ b/fs/ext4/move_extent.c @@ -184,7 +184,7 @@ mext_page_mkuptodate(struct folio *folio, unsigned from, unsigned to) blocksize = i_blocksize(inode); head = folio_buffers(folio); if (!head) - head = folio_create_empty_buffers(folio, blocksize, 0); + head = create_empty_buffers(folio, blocksize, 0); block = (sector_t)folio->index << (PAGE_SHIFT - inode->i_blkbits); for (bh = head, block_start = 0; bh != head || !block_start; @@ -380,7 +380,7 @@ data_copy: * but keeping in mind that i_size will not change */ bh = folio_buffers(folio[0]); if (!bh) - bh = folio_create_empty_buffers(folio[0], + bh = create_empty_buffers(folio[0], 1 << orig_inode->i_blkbits, 0); for (i = 0; i < data_offset_in_page; i++) bh = bh->b_this_page; diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c index c26d48355cc2..6b060fc9e260 100644 --- a/fs/gfs2/aops.c +++ b/fs/gfs2/aops.c @@ -130,7 +130,7 @@ static int __gfs2_jdata_write_folio(struct folio *folio, if (folio_test_checked(folio)) { folio_clear_checked(folio); if (!folio_buffers(folio)) { - folio_create_empty_buffers(folio, + create_empty_buffers(folio, inode->i_sb->s_blocksize, BIT(BH_Dirty)|BIT(BH_Uptodate)); } diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 247d2c16593c..f1eee3f4704b 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -71,7 +71,7 @@ static int gfs2_unstuffer_folio(struct gfs2_inode *ip, struct buffer_head *dibh, struct buffer_head *bh = folio_buffers(folio); if (!bh) - bh = folio_create_empty_buffers(folio, + bh = create_empty_buffers(folio, BIT(inode->i_blkbits), BIT(BH_Uptodate)); if (!buffer_mapped(bh)) diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c index f6d40d51f5ed..25ceb0805df2 100644 --- a/fs/gfs2/meta_io.c +++ b/fs/gfs2/meta_io.c @@ -134,7 +134,7 @@ struct buffer_head *gfs2_getbuf(struct gfs2_glock *gl, u64 blkno, int create) mapping_gfp_mask(mapping) | __GFP_NOFAIL); bh = folio_buffers(folio); if (!bh) - bh = folio_create_empty_buffers(folio, + bh = create_empty_buffers(folio, sdp->sd_sb.sb_bsize, 0); } else { folio = __filemap_get_folio(mapping, index, diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c index 25354278cecb..2f1328af34f4 100644 --- a/fs/gfs2/quota.c +++ b/fs/gfs2/quota.c @@ -763,7 +763,7 @@ static int gfs2_write_buf_to_page(struct gfs2_sbd *sdp, unsigned long index, return PTR_ERR(folio); bh = folio_buffers(folio); if (!bh) - bh = folio_create_empty_buffers(folio, bsize, 0); + bh = create_empty_buffers(folio, bsize, 0); for (;;) { /* Find the beginning block within the folio */ diff --git a/fs/mpage.c b/fs/mpage.c index 964a6efe594d..ffb064ed9d04 100644 --- a/fs/mpage.c +++ b/fs/mpage.c @@ -119,7 +119,7 @@ static void map_buffer_to_folio(struct folio *folio, struct buffer_head *bh, folio_mark_uptodate(folio); return; } - head = folio_create_empty_buffers(folio, i_blocksize(inode), 0); + head = create_empty_buffers(folio, i_blocksize(inode), 0); } page_bh = head; diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c index 7b754e6494d7..c97c77a39668 100644 --- a/fs/nilfs2/mdt.c +++ b/fs/nilfs2/mdt.c @@ -568,7 +568,7 @@ int nilfs_mdt_freeze_buffer(struct inode *inode, struct buffer_head *bh) bh_frozen = folio_buffers(folio); if (!bh_frozen) - bh_frozen = folio_create_empty_buffers(folio, 1 << blkbits, 0); + bh_frozen = create_empty_buffers(folio, 1 << blkbits, 0); bh_frozen = get_nth_bh(bh_frozen, bh_offset(bh) >> blkbits); diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c index 696215d899bf..06b04758f289 100644 --- a/fs/nilfs2/page.c +++ b/fs/nilfs2/page.c @@ -34,7 +34,7 @@ static struct buffer_head *__nilfs_get_folio_block(struct folio *folio, struct buffer_head *bh = folio_buffers(folio); if (!bh) - bh = folio_create_empty_buffers(folio, 1 << blkbits, b_state); + bh = create_empty_buffers(folio, 1 << blkbits, b_state); first_block = (unsigned long)index << (PAGE_SHIFT - blkbits); bh = get_nth_bh(bh, block - first_block); @@ -204,7 +204,7 @@ static void nilfs_copy_folio(struct folio *dst, struct folio *src, sbh = folio_buffers(src); dbh = folio_buffers(dst); if (!dbh) - dbh = folio_create_empty_buffers(dst, sbh->b_size, 0); + dbh = create_empty_buffers(dst, sbh->b_size, 0); if (copy_dirty) mask |= BIT(BH_Dirty); diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c index 94388fe83cf8..55e31cc903d1 100644 --- a/fs/nilfs2/segment.c +++ b/fs/nilfs2/segment.c @@ -732,7 +732,7 @@ static size_t nilfs_lookup_dirty_data_buffers(struct inode *inode, } head = folio_buffers(folio); if (!head) - head = folio_create_empty_buffers(folio, + head = create_empty_buffers(folio, i_blocksize(inode), 0); folio_unlock(folio); diff --git a/fs/ntfs/aops.c b/fs/ntfs/aops.c index c4426992a2ee..71e31e789b29 100644 --- a/fs/ntfs/aops.c +++ b/fs/ntfs/aops.c @@ -189,7 +189,7 @@ static int ntfs_read_block(struct folio *folio) head = folio_buffers(folio); if (!head) - head = folio_create_empty_buffers(folio, blocksize, 0); + head = create_empty_buffers(folio, blocksize, 0); bh = head; /* @@ -555,7 +555,7 @@ static int ntfs_write_block(struct folio *folio, struct writeback_control *wbc) head = folio_buffers(folio); if (!head) { BUG_ON(!folio_test_uptodate(folio)); - head = folio_create_empty_buffers(folio, blocksize, + head = create_empty_buffers(folio, blocksize, (1 << BH_Uptodate) | (1 << BH_Dirty)); } bh = head; diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c index 099141d20db6..297c0b9db621 100644 --- a/fs/ntfs/file.c +++ b/fs/ntfs/file.c @@ -625,7 +625,7 @@ do_next_folio: * create_empty_buffers() will create uptodate/dirty * buffers if the folio is uptodate/dirty. */ - head = folio_create_empty_buffers(folio, blocksize, 0); + head = create_empty_buffers(folio, blocksize, 0); bh = head; do { VCN cdelta; diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c index a003a69091a2..66fd4ac28395 100644 --- a/fs/ntfs3/file.c +++ b/fs/ntfs3/file.c @@ -203,7 +203,7 @@ static int ntfs_zero_range(struct inode *inode, u64 vbo, u64 vbo_to) head = folio_buffers(folio); if (!head) - head = folio_create_empty_buffers(folio, blocksize, 0); + head = create_empty_buffers(folio, blocksize, 0); bh = head; bh_off = 0; diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index 95d1e70b4401..a6405dd5df09 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -601,7 +601,7 @@ int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno, head = folio_buffers(folio); if (!head) - head = folio_create_empty_buffers(folio, bsize, 0); + head = create_empty_buffers(folio, bsize, 0); for (bh = head, block_start = 0; bh != head || !block_start; bh = bh->b_this_page, block_start += bsize) { diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c index d9737235b8e0..a9075c4843ed 100644 --- a/fs/reiserfs/inode.c +++ b/fs/reiserfs/inode.c @@ -2539,7 +2539,7 @@ static int reiserfs_write_full_folio(struct folio *folio, */ head = folio_buffers(folio); if (!head) - head = folio_create_empty_buffers(folio, s->s_blocksize, + head = create_empty_buffers(folio, s->s_blocksize, (1 << BH_Dirty) | (1 << BH_Uptodate)); /* diff --git a/fs/ufs/util.c b/fs/ufs/util.c index d32de30009a0..13ba34e6d64f 100644 --- a/fs/ufs/util.c +++ b/fs/ufs/util.c @@ -264,6 +264,6 @@ struct folio *ufs_get_locked_folio(struct address_space *mapping, } } if (!folio_buffers(folio)) - folio_create_empty_buffers(folio, 1 << inode->i_blkbits, 0); + create_empty_buffers(folio, 1 << inode->i_blkbits, 0); return folio; } diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 3d85a0cf0ca5..5f23ee599889 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -201,9 +201,7 @@ struct buffer_head *folio_alloc_buffers(struct folio *folio, unsigned long size, gfp_t gfp); struct buffer_head *alloc_page_buffers(struct page *page, unsigned long size, bool retry); -void create_empty_buffers(struct page *, unsigned long, - unsigned long b_state); -struct buffer_head *folio_create_empty_buffers(struct folio *folio, +struct buffer_head *create_empty_buffers(struct folio *folio, unsigned long blocksize, unsigned long b_state); void end_buffer_read_sync(struct buffer_head *bh, int uptodate); void end_buffer_write_sync(struct buffer_head *bh, int uptodate); -- cgit v1.2.3 From 1cbf0a58847b30507611f92ad69964ef37264d14 Mon Sep 17 00:00:00 2001 From: Hugh Dickins Date: Mon, 23 Oct 2023 23:26:08 -0700 Subject: ext4: add __GFP_NOWARN to GFP_NOWAIT in readahead Since commit e509ad4d77e6 ("ext4: use bdev_getblk() to avoid memory reclaim in readahead path") rightly replaced GFP_NOFAIL allocations by GFP_NOWAIT allocations, I've occasionally been seeing "page allocation failure: order:0" warnings under load: all with ext4_sb_breadahead_unmovable() in the stack. I don't think those warnings are of any interest: suppress them with __GFP_NOWARN. Link: https://lkml.kernel.org/r/7bc6ad16-9a4d-dd90-202e-47d6cbb5a136@google.com Fixes: e509ad4d77e6 ("ext4: use bdev_getblk() to avoid memory reclaim in readahead path") Signed-off-by: Hugh Dickins Reviewed-by: Jan Kara Cc: Hui Zhu Cc: Matthew Wilcox (Oracle) Cc: Theodore Ts'o Signed-off-by: Andrew Morton --- fs/ext4/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/ext4') diff --git a/fs/ext4/super.c b/fs/ext4/super.c index c00ec159dea5..56a08fc5c5d5 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -262,7 +262,7 @@ struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) { struct buffer_head *bh = bdev_getblk(sb->s_bdev, block, - sb->s_blocksize, GFP_NOWAIT); + sb->s_blocksize, GFP_NOWAIT | __GFP_NOWARN); if (likely(bh)) { if (trylock_buffer(bh)) -- cgit v1.2.3