From 64a167011bcabc1e855658387c8a4464b71f3138 Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Wed, 15 Jul 2009 23:29:37 +0100 Subject: Btrfs: add rw argument to merge_bio_hook() We'll want to merge writes so they can fill a full RAID[56] stripe, but not necessarily reads. Signed-off-by: David Woodhouse Signed-off-by: Chris Mason --- fs/btrfs/extent_io.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/btrfs/extent_io.h') diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 2eacfabd3263..b14b36a80eba 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -72,7 +72,7 @@ struct extent_io_ops { int (*writepage_start_hook)(struct page *page, u64 start, u64 end); int (*writepage_io_hook)(struct page *page, u64 start, u64 end); extent_submit_bio_hook_t *submit_bio_hook; - int (*merge_bio_hook)(struct page *page, unsigned long offset, + int (*merge_bio_hook)(int rw, struct page *page, unsigned long offset, size_t size, struct bio *bio, unsigned long bio_flags); int (*readpage_io_hook)(struct page *page, u64 start, u64 end); -- cgit v1.2.3 From c8f2f24bd56a9f0bc7372e6d6aded6fc122b9120 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Mon, 11 Feb 2013 11:33:00 -0500 Subject: Btrfs: remove unused extent io tree ops V2 Nobody uses these io tree ops anymore so just remove them and clean up the code a bit. Thanks, Signed-off-by: Josef Bacik --- fs/btrfs/extent_io.c | 35 +++++++++++------------------------ fs/btrfs/extent_io.h | 3 --- 2 files changed, 11 insertions(+), 27 deletions(-) (limited to 'fs/btrfs/extent_io.h') diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index b9019c847c58..5c00d6aeae75 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -2646,6 +2646,8 @@ static int __extent_read_full_page(struct extent_io_tree *tree, } } while (cur <= end) { + unsigned long pnr = (last_byte >> PAGE_CACHE_SHIFT) + 1; + if (cur >= last_byte) { char *userpage; struct extent_state *cached = NULL; @@ -2733,26 +2735,17 @@ static int __extent_read_full_page(struct extent_io_tree *tree, continue; } - ret = 0; - if (tree->ops && tree->ops->readpage_io_hook) { - ret = tree->ops->readpage_io_hook(page, cur, - cur + iosize - 1); - } - if (!ret) { - unsigned long pnr = (last_byte >> PAGE_CACHE_SHIFT) + 1; - pnr -= page->index; - ret = submit_extent_page(READ, tree, page, + pnr -= page->index; + ret = submit_extent_page(READ, tree, page, sector, disk_io_size, pg_offset, bdev, bio, pnr, end_bio_extent_readpage, mirror_num, *bio_flags, this_bio_flag); - if (!ret) { - nr++; - *bio_flags = this_bio_flag; - } - } - if (ret) { + if (!ret) { + nr++; + *bio_flags = this_bio_flag; + } else { SetPageError(page); unlock_extent(tree, cur, cur + iosize - 1); } @@ -3441,15 +3434,9 @@ retry: * swizzled back from swapper_space to tmpfs file * mapping */ - if (tree->ops && - tree->ops->write_cache_pages_lock_hook) { - tree->ops->write_cache_pages_lock_hook(page, - data, flush_fn); - } else { - if (!trylock_page(page)) { - flush_fn(data); - lock_page(page); - } + if (!trylock_page(page)) { + flush_fn(data); + lock_page(page); } if (unlikely(page->mapping != mapping)) { diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 2eacfabd3263..ff182322d112 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -75,7 +75,6 @@ struct extent_io_ops { int (*merge_bio_hook)(struct page *page, unsigned long offset, size_t size, struct bio *bio, unsigned long bio_flags); - int (*readpage_io_hook)(struct page *page, u64 start, u64 end); int (*readpage_io_failed_hook)(struct page *page, int failed_mirror); int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end, struct extent_state *state, int mirror); @@ -90,8 +89,6 @@ struct extent_io_ops { struct extent_state *other); void (*split_extent_hook)(struct inode *inode, struct extent_state *orig, u64 split); - int (*write_cache_pages_lock_hook)(struct page *page, void *data, - void (*flush_fn)(void *)); }; struct extent_io_tree { -- cgit v1.2.3 From b8dae3138876080d4dd98cc438ff759338d632ef Mon Sep 17 00:00:00 2001 From: David Sterba Date: Thu, 28 Feb 2013 14:54:18 +0000 Subject: btrfs: use only inline_pages from extent buffer The nodesize is capped at 64k and there are enough pages preallocated in extent_buffer::inline_pages. The fallback to kmalloc never happened because even on the smallest page size considered (4k) inline_pages covered the needs. Signed-off-by: David Sterba Signed-off-by: Josef Bacik --- fs/btrfs/extent_io.c | 21 ++++++--------------- fs/btrfs/extent_io.h | 3 +-- 2 files changed, 7 insertions(+), 17 deletions(-) (limited to 'fs/btrfs/extent_io.h') diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 597ab8966c80..0306665cb1d7 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -3981,8 +3981,6 @@ static void __free_extent_buffer(struct extent_buffer *eb) list_del(&eb->leak_list); spin_unlock_irqrestore(&leak_lock, flags); #endif - if (eb->pages && eb->pages != eb->inline_pages) - kfree(eb->pages); kmem_cache_free(extent_buffer_cache, eb); } @@ -4023,19 +4021,12 @@ static struct extent_buffer *__alloc_extent_buffer(struct extent_io_tree *tree, atomic_set(&eb->refs, 1); atomic_set(&eb->io_pages, 0); - if (len > MAX_INLINE_EXTENT_BUFFER_SIZE) { - struct page **pages; - int num_pages = (len + PAGE_CACHE_SIZE - 1) >> - PAGE_CACHE_SHIFT; - pages = kzalloc(num_pages, mask); - if (!pages) { - __free_extent_buffer(eb); - return NULL; - } - eb->pages = pages; - } else { - eb->pages = eb->inline_pages; - } + /* + * Sanity checks, currently the maximum is 64k covered by 16x 4k pages + */ + BUILD_BUG_ON(BTRFS_MAX_METADATA_BLOCKSIZE + > MAX_INLINE_EXTENT_BUFFER_SIZE); + BUG_ON(len > MAX_INLINE_EXTENT_BUFFER_SIZE); return eb; } diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index dc81868d975a..6068a1985560 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -158,8 +158,7 @@ struct extent_buffer { */ wait_queue_head_t read_lock_wq; wait_queue_head_t lock_wq; - struct page *inline_pages[INLINE_EXTENT_BUFFER_PAGES]; - struct page **pages; + struct page *pages[INLINE_EXTENT_BUFFER_PAGES]; }; static inline void extent_set_compress_type(unsigned long *bio_flags, -- cgit v1.2.3