From 895586eb689819c83a83271fdebccfd00a5a7616 Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Wed, 9 Feb 2022 20:21:39 +0000 Subject: [PATCH] btrfs: Convert from invalidatepage to invalidate_folio A lot of the underlying infrastructure in btrfs needs to be switched over to folios, but this at least documents that invalidatepage can't be passed a tail page. Signed-off-by: Matthew Wilcox (Oracle) Tested-by: Damien Le Moal Acked-by: Damien Le Moal Tested-by: Mike Marshall # orangefs Tested-by: David Howells # afs --- fs/btrfs/ctree.h | 3 ++ fs/btrfs/disk-io.c | 22 +++++++------- fs/btrfs/extent-io-tree.h | 4 +-- fs/btrfs/extent_io.c | 16 +++++----- fs/btrfs/inode.c | 77 ++++++++++++++++++++++++----------------------- 5 files changed, 63 insertions(+), 59 deletions(-) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 8992e00..0608d1c 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -3876,5 +3876,8 @@ static inline bool btrfs_is_data_reloc_root(const struct btrfs_root *root) #define PageOrdered(page) PagePrivate2(page) #define SetPageOrdered(page) SetPagePrivate2(page) #define ClearPageOrdered(page) ClearPagePrivate2(page) +#define folio_test_ordered(folio) folio_test_private_2(folio) +#define folio_set_ordered(folio) folio_set_private_2(folio) +#define folio_clear_ordered(folio) folio_clear_private_2(folio) #endif diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 87a5add..7e9d3b9 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -999,18 +999,18 @@ static int btree_releasepage(struct page *page, gfp_t gfp_flags) return try_release_extent_buffer(page); } -static void btree_invalidatepage(struct page *page, unsigned int offset, - unsigned int length) +static void btree_invalidate_folio(struct folio *folio, size_t offset, + size_t length) { struct extent_io_tree *tree; - tree = &BTRFS_I(page->mapping->host)->io_tree; - extent_invalidatepage(tree, page, offset); - btree_releasepage(page, GFP_NOFS); - if (PagePrivate(page)) { - btrfs_warn(BTRFS_I(page->mapping->host)->root->fs_info, - "page private not zero on page %llu", - (unsigned long long)page_offset(page)); - detach_page_private(page); + tree = &BTRFS_I(folio->mapping->host)->io_tree; + extent_invalidate_folio(tree, folio, offset); + btree_releasepage(&folio->page, GFP_NOFS); + if (folio_get_private(folio)) { + btrfs_warn(BTRFS_I(folio->mapping->host)->root->fs_info, + "folio private not zero on folio %llu", + (unsigned long long)folio_pos(folio)); + folio_detach_private(folio); } } @@ -1066,7 +1066,7 @@ static int btree_set_page_dirty(struct page *page) static const struct address_space_operations btree_aops = { .writepages = btree_writepages, .releasepage = btree_releasepage, - .invalidatepage = btree_invalidatepage, + .invalidate_folio = btree_invalidate_folio, #ifdef CONFIG_MIGRATION .migratepage = btree_migratepage, #endif diff --git a/fs/btrfs/extent-io-tree.h b/fs/btrfs/extent-io-tree.h index 04083ee5..c3eb52d 100644 --- a/fs/btrfs/extent-io-tree.h +++ b/fs/btrfs/extent-io-tree.h @@ -244,8 +244,8 @@ void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 *start_ret, u64 *end_ret, u32 bits); int find_contiguous_extent_bit(struct extent_io_tree *tree, u64 start, u64 *start_ret, u64 *end_ret, u32 bits); -int extent_invalidatepage(struct extent_io_tree *tree, - struct page *page, unsigned long offset); +int extent_invalidate_folio(struct extent_io_tree *tree, + struct folio *folio, size_t offset); bool btrfs_find_delalloc_range(struct extent_io_tree *tree, u64 *start, u64 *end, u64 max_bytes, struct extent_state **cached_state); diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 1e6bf7f..9c9952c 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -5219,17 +5219,17 @@ void extent_readahead(struct readahead_control *rac) } /* - * basic invalidatepage code, this waits on any locked or writeback - * ranges corresponding to the page, and then deletes any extent state + * basic invalidate_folio code, this waits on any locked or writeback + * ranges corresponding to the folio, and then deletes any extent state * records from the tree */ -int extent_invalidatepage(struct extent_io_tree *tree, - struct page *page, unsigned long offset) +int extent_invalidate_folio(struct extent_io_tree *tree, + struct folio *folio, size_t offset) { struct extent_state *cached_state = NULL; - u64 start = page_offset(page); - u64 end = start + PAGE_SIZE - 1; - size_t blocksize = page->mapping->host->i_sb->s_blocksize; + u64 start = folio_pos(folio); + u64 end = start + folio_size(folio) - 1; + size_t blocksize = folio->mapping->host->i_sb->s_blocksize; /* This function is only called for the btree inode */ ASSERT(tree->owner == IO_TREE_BTREE_INODE_IO); @@ -5239,7 +5239,7 @@ int extent_invalidatepage(struct extent_io_tree *tree, return 0; lock_extent_bits(tree, start, end, &cached_state); - wait_on_page_writeback(page); + folio_wait_writeback(folio); /* * Currently for btree io tree, only EXTENT_LOCKED is utilized, diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 3b2403b..9046c14 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -5046,16 +5046,17 @@ static int btrfs_setattr(struct user_namespace *mnt_userns, struct dentry *dentr } /* - * While truncating the inode pages during eviction, we get the VFS calling - * btrfs_invalidatepage() against each page of the inode. This is slow because - * the calls to btrfs_invalidatepage() result in a huge amount of calls to - * lock_extent_bits() and clear_extent_bit(), which keep merging and splitting - * extent_state structures over and over, wasting lots of time. + * While truncating the inode pages during eviction, we get the VFS + * calling btrfs_invalidate_folio() against each folio of the inode. This + * is slow because the calls to btrfs_invalidate_folio() result in a + * huge amount of calls to lock_extent_bits() and clear_extent_bit(), + * which keep merging and splitting extent_state structures over and over, + * wasting lots of time. * - * Therefore if the inode is being evicted, let btrfs_invalidatepage() skip all - * those expensive operations on a per page basis and do only the ordered io - * finishing, while we release here the extent_map and extent_state structures, - * without the excessive merging and splitting. + * Therefore if the inode is being evicted, let btrfs_invalidate_folio() + * skip all those expensive operations on a per folio basis and do only + * the ordered io finishing, while we release here the extent_map and + * extent_state structures, without the excessive merging and splitting. */ static void evict_inode_truncate_pages(struct inode *inode) { @@ -5121,7 +5122,7 @@ static void evict_inode_truncate_pages(struct inode *inode) * If still has DELALLOC flag, the extent didn't reach disk, * and its reserved space won't be freed by delayed_ref. * So we need to free its reserved space here. - * (Refer to comment in btrfs_invalidatepage, case 2) + * (Refer to comment in btrfs_invalidate_folio, case 2) * * Note, end is the bytenr of last byte, so we need + 1 here. */ @@ -8118,8 +8119,8 @@ static void btrfs_readahead(struct readahead_control *rac) } /* - * For releasepage() and invalidatepage() we have a race window where - * end_page_writeback() is called but the subpage spinlock is not yet released. + * For releasepage() and invalidate_folio() we have a race window where + * folio_end_writeback() is called but the subpage spinlock is not yet released. * If we continue to release/invalidate the page, we could cause use-after-free * for subpage spinlock. So this function is to spin and wait for subpage * spinlock. @@ -8195,48 +8196,48 @@ static int btrfs_migratepage(struct address_space *mapping, } #endif -static void btrfs_invalidatepage(struct page *page, unsigned int offset, - unsigned int length) +static void btrfs_invalidate_folio(struct folio *folio, size_t offset, + size_t length) { - struct btrfs_inode *inode = BTRFS_I(page->mapping->host); + struct btrfs_inode *inode = BTRFS_I(folio->mapping->host); struct btrfs_fs_info *fs_info = inode->root->fs_info; struct extent_io_tree *tree = &inode->io_tree; struct extent_state *cached_state = NULL; - u64 page_start = page_offset(page); - u64 page_end = page_start + PAGE_SIZE - 1; + u64 page_start = folio_pos(folio); + u64 page_end = page_start + folio_size(folio) - 1; u64 cur; int inode_evicting = inode->vfs_inode.i_state & I_FREEING; /* - * We have page locked so no new ordered extent can be created on this - * page, nor bio can be submitted for this page. + * We have folio locked so no new ordered extent can be created on this + * page, nor bio can be submitted for this folio. * - * But already submitted bio can still be finished on this page. - * Furthermore, endio function won't skip page which has Ordered + * But already submitted bio can still be finished on this folio. + * Furthermore, endio function won't skip folio which has Ordered * (Private2) already cleared, so it's possible for endio and - * invalidatepage to do the same ordered extent accounting twice - * on one page. + * invalidate_folio to do the same ordered extent accounting twice + * on one folio. * * So here we wait for any submitted bios to finish, so that we won't - * do double ordered extent accounting on the same page. + * do double ordered extent accounting on the same folio. */ - wait_on_page_writeback(page); - wait_subpage_spinlock(page); + folio_wait_writeback(folio); + wait_subpage_spinlock(&folio->page); /* * For subpage case, we have call sites like * btrfs_punch_hole_lock_range() which passes range not aligned to * sectorsize. - * If the range doesn't cover the full page, we don't need to and - * shouldn't clear page extent mapped, as page->private can still + * If the range doesn't cover the full folio, we don't need to and + * shouldn't clear page extent mapped, as folio->private can still * record subpage dirty bits for other part of the range. * - * For cases that can invalidate the full even the range doesn't - * cover the full page, like invalidating the last page, we're + * For cases that invalidate the full folio even the range doesn't + * cover the full folio, like invalidating the last folio, we're * still safe to wait for ordered extent to finish. */ if (!(offset == 0 && length == PAGE_SIZE)) { - btrfs_releasepage(page, GFP_NOFS); + btrfs_releasepage(&folio->page, GFP_NOFS); return; } @@ -8277,7 +8278,7 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset, page_end); ASSERT(range_end + 1 - cur < U32_MAX); range_len = range_end + 1 - cur; - if (!btrfs_page_test_ordered(fs_info, page, cur, range_len)) { + if (!btrfs_page_test_ordered(fs_info, &folio->page, cur, range_len)) { /* * If Ordered (Private2) is cleared, it means endio has * already been executed for the range. @@ -8287,7 +8288,7 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset, delete_states = false; goto next; } - btrfs_page_clear_ordered(fs_info, page, cur, range_len); + btrfs_page_clear_ordered(fs_info, &folio->page, cur, range_len); /* * IO on this page will never be started, so we need to account @@ -8357,11 +8358,11 @@ next: * should not have Ordered (Private2) anymore, or the above iteration * did something wrong. */ - ASSERT(!PageOrdered(page)); - btrfs_page_clear_checked(fs_info, page, page_offset(page), PAGE_SIZE); + ASSERT(!folio_test_ordered(folio)); + btrfs_page_clear_checked(fs_info, &folio->page, folio_pos(folio), folio_size(folio)); if (!inode_evicting) - __btrfs_releasepage(page, GFP_NOFS); - clear_page_extent_mapped(page); + __btrfs_releasepage(&folio->page, GFP_NOFS); + clear_page_extent_mapped(&folio->page); } /* @@ -10638,7 +10639,7 @@ static const struct address_space_operations btrfs_aops = { .writepages = btrfs_writepages, .readahead = btrfs_readahead, .direct_IO = noop_direct_IO, - .invalidatepage = btrfs_invalidatepage, + .invalidate_folio = btrfs_invalidate_folio, .releasepage = btrfs_releasepage, #ifdef CONFIG_MIGRATION .migratepage = btrfs_migratepage, -- 2.7.4