diff options
Diffstat (limited to 'fs')
100 files changed, 2845 insertions, 979 deletions
diff --git a/fs/9p/cache.c b/fs/9p/cache.c index 51c94e26a34..e777961939f 100644 --- a/fs/9p/cache.c +++ b/fs/9p/cache.c @@ -343,18 +343,7 @@ int __v9fs_fscache_release_page(struct page *page, gfp_t gfp) BUG_ON(!vcookie->fscache); - if (PageFsCache(page)) { - if (fscache_check_page_write(vcookie->fscache, page)) { - if (!(gfp & __GFP_WAIT)) - return 0; - fscache_wait_on_page_write(vcookie->fscache, page); - } - - fscache_uncache_page(vcookie->fscache, page); - ClearPageFsCache(page); - } - - return 1; + return fscache_maybe_release_page(vcookie->fscache, page, gfp); } void __v9fs_fscache_invalidate_page(struct page *page) @@ -368,7 +357,6 @@ void __v9fs_fscache_invalidate_page(struct page *page) fscache_wait_on_page_write(vcookie->fscache, page); BUG_ON(!PageLocked(page)); fscache_uncache_page(vcookie->fscache, page); - ClearPageFsCache(page); } } diff --git a/fs/Kconfig b/fs/Kconfig index 2126078a38e..64d44efad7a 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -135,7 +135,7 @@ config TMPFS_POSIX_ACL config HUGETLBFS bool "HugeTLB file system support" - depends on X86 || IA64 || PPC_BOOK3S_64 || SPARC64 || (S390 && 64BIT) || \ + depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \ SYS_SUPPORTS_HUGETLBFS || BROKEN help hugetlbfs is a filesystem backing for HugeTLB pages, based on diff --git a/fs/afs/file.c b/fs/afs/file.c index 681c2a7b013..39b301662f2 100644 --- a/fs/afs/file.c +++ b/fs/afs/file.c @@ -315,7 +315,6 @@ static void afs_invalidatepage(struct page *page, unsigned long offset) struct afs_vnode *vnode = AFS_FS_I(page->mapping->host); fscache_wait_on_page_write(vnode->cache, page); fscache_uncache_page(vnode->cache, page); - ClearPageFsCache(page); } #endif @@ -349,17 +348,9 @@ static int afs_releasepage(struct page *page, gfp_t gfp_flags) /* deny if page is being written to the cache and the caller hasn't * elected to wait */ #ifdef CONFIG_AFS_FSCACHE - if (PageFsCache(page)) { - if (fscache_check_page_write(vnode->cache, page)) { - if (!(gfp_flags & __GFP_WAIT)) { - _leave(" = F [cache busy]"); - return 0; - } - fscache_wait_on_page_write(vnode->cache, page); - } - - fscache_uncache_page(vnode->cache, page); - ClearPageFsCache(page); + if (!fscache_maybe_release_page(vnode->cache, page, gfp_flags)) { + _leave(" = F [cache busy]"); + return 0; } #endif @@ -325,8 +325,16 @@ static void bio_fs_destructor(struct bio *bio) * @gfp_mask: allocation mask to use * @nr_iovecs: number of iovecs * - * Allocate a new bio with @nr_iovecs bvecs. If @gfp_mask - * contains __GFP_WAIT, the allocation is guaranteed to succeed. + * bio_alloc will allocate a bio and associated bio_vec array that can hold + * at least @nr_iovecs entries. Allocations will be done from the + * fs_bio_set. Also see @bio_alloc_bioset and @bio_kmalloc. + * + * If %__GFP_WAIT is set, then bio_alloc will always be able to allocate + * a bio. This is due to the mempool guarantees. To make this work, callers + * must never allocate more than 1 bio at a time from this pool. Callers + * that need to allocate more than 1 bio must always submit the previously + * allocated bio for IO before attempting to allocate a new one. Failure to + * do so can cause livelocks under memory pressure. * * RETURNS: * Pointer to new bio on success, NULL on failure. @@ -350,21 +358,13 @@ static void bio_kmalloc_destructor(struct bio *bio) } /** - * bio_alloc - allocate a bio for I/O + * bio_kmalloc - allocate a bio for I/O using kmalloc() * @gfp_mask: the GFP_ mask given to the slab allocator * @nr_iovecs: number of iovecs to pre-allocate * * Description: - * bio_alloc will allocate a bio and associated bio_vec array that can hold - * at least @nr_iovecs entries. Allocations will be done from the - * fs_bio_set. Also see @bio_alloc_bioset. - * - * If %__GFP_WAIT is set, then bio_alloc will always be able to allocate - * a bio. This is due to the mempool guarantees. To make this work, callers - * must never allocate more than 1 bio at a time from this pool. Callers - * that need to allocate more than 1 bio must always submit the previously - * allocated bio for IO before attempting to allocate a new one. Failure to - * do so can cause livelocks under memory pressure. + * Allocate a new bio with @nr_iovecs bvecs. If @gfp_mask contains + * %__GFP_WAIT, the allocation is guaranteed to succeed. * **/ struct bio *bio_kmalloc(gfp_t gfp_mask, int nr_iovecs) @@ -407,7 +407,7 @@ EXPORT_SYMBOL(zero_fill_bio); * * Description: * Put a reference to a &struct bio, either one you have gotten with - * bio_alloc or bio_get. The last put of a bio will free it. + * bio_alloc, bio_get or bio_clone. The last put of a bio will free it. **/ void bio_put(struct bio *bio) { diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index e238a0cdac6..94627c4cc19 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -2977,10 +2977,10 @@ static int maybe_allocate_chunk(struct btrfs_root *root, free_space = btrfs_super_total_bytes(disk_super); /* - * we allow the metadata to grow to a max of either 5gb or 5% of the + * we allow the metadata to grow to a max of either 10gb or 5% of the * space in the volume. */ - min_metadata = min((u64)5 * 1024 * 1024 * 1024, + min_metadata = min((u64)10 * 1024 * 1024 * 1024, div64_u64(free_space * 5, 100)); if (info->total_bytes >= min_metadata) { spin_unlock(&info->lock); @@ -4102,7 +4102,7 @@ wait_block_group_cache_done(struct btrfs_block_group_cache *cache) } enum btrfs_loop_type { - LOOP_CACHED_ONLY = 0, + LOOP_FIND_IDEAL = 0, LOOP_CACHING_NOWAIT = 1, LOOP_CACHING_WAIT = 2, LOOP_ALLOC_CHUNK = 3, @@ -4131,12 +4131,15 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_block_group_cache *block_group = NULL; int empty_cluster = 2 * 1024 * 1024; int allowed_chunk_alloc = 0; + int done_chunk_alloc = 0; struct btrfs_space_info *space_info; int last_ptr_loop = 0; int loop = 0; bool found_uncached_bg = false; bool failed_cluster_refill = false; bool failed_alloc = false; + u64 ideal_cache_percent = 0; + u64 ideal_cache_offset = 0; WARN_ON(num_bytes < root->sectorsize); btrfs_set_key_type(ins, BTRFS_EXTENT_ITEM_KEY); @@ -4172,14 +4175,19 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans, empty_cluster = 0; if (search_start == hint_byte) { +ideal_cache: block_group = btrfs_lookup_block_group(root->fs_info, search_start); /* * we don't want to use the block group if it doesn't match our * allocation bits, or if its not cached. + * + * However if we are re-searching with an ideal block group + * picked out then we don't care that the block group is cached. */ if (block_group && block_group_bits(block_group, data) && - block_group_cache_done(block_group)) { + (block_group->cached != BTRFS_CACHE_NO || + search_start == ideal_cache_offset)) { down_read(&space_info->groups_sem); if (list_empty(&block_group->list) || block_group->ro) { @@ -4191,13 +4199,13 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans, */ btrfs_put_block_group(block_group); up_read(&space_info->groups_sem); - } else + } else { goto have_block_group; + } } else if (block_group) { btrfs_put_block_group(block_group); } } - search: down_read(&space_info->groups_sem); list_for_each_entry(block_group, &space_info->block_groups, list) { @@ -4209,28 +4217,45 @@ search: have_block_group: if (unlikely(block_group->cached == BTRFS_CACHE_NO)) { + u64 free_percent; + + free_percent = btrfs_block_group_used(&block_group->item); + free_percent *= 100; + free_percent = div64_u64(free_percent, + block_group->key.offset); + free_percent = 100 - free_percent; + if (free_percent > ideal_cache_percent && + likely(!block_group->ro)) { + ideal_cache_offset = block_group->key.objectid; + ideal_cache_percent = free_percent; + } + /* - * we want to start caching kthreads, but not too many - * right off the bat so we don't overwhelm the system, - * so only start them if there are less than 2 and we're - * in the initial allocation phase. + * We only want to start kthread caching if we are at + * the point where we will wait for caching to make + * progress, or if our ideal search is over and we've + * found somebody to start caching. */ if (loop > LOOP_CACHING_NOWAIT || - atomic_read(&space_info->caching_threads) < 2) { + (loop > LOOP_FIND_IDEAL && + atomic_read(&space_info->caching_threads) < 2)) { ret = cache_block_group(block_g |