From 3b16a4e3c355ee3c790473decfcf83d4faeb8ce0 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Wed, 21 Sep 2011 15:05:58 -0400 Subject: [PATCH] Btrfs: use the inode's mapping mask for allocating pages Johannes pointed out we were allocating only kernel pages for doing writes, which is kind of a big deal if you are on 32bit and have more than a gig of ram. So fix our allocations to use the mapping's gfp but still clear __GFP_FS so we don't re-enter. Thanks, Reported-by: Johannes Weiner Signed-off-by: Josef Bacik --- fs/btrfs/ctree.h | 6 ++++++ fs/btrfs/file.c | 3 ++- fs/btrfs/free-space-cache.c | 6 ++++-- fs/btrfs/inode.c | 3 ++- fs/btrfs/ioctl.c | 3 ++- fs/btrfs/relocation.c | 3 ++- 6 files changed, 18 insertions(+), 6 deletions(-) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index a5faf8e..47dea71 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -30,6 +30,7 @@ #include #include #include +#include #include "extent_io.h" #include "extent_map.h" #include "async-thread.h" @@ -2117,6 +2118,11 @@ static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); } +static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) +{ + return mapping_gfp_mask(mapping) & ~__GFP_FS; +} + /* extent-tree.c */ static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root, unsigned num_items) diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index de569af..f2e9282 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1069,6 +1069,7 @@ static noinline int prepare_pages(struct btrfs_root *root, struct file *file, int i; unsigned long index = pos >> PAGE_CACHE_SHIFT; struct inode *inode = fdentry(file)->d_inode; + gfp_t mask = btrfs_alloc_write_mask(inode->i_mapping); int err = 0; int faili = 0; u64 start_pos; @@ -1080,7 +1081,7 @@ static noinline int prepare_pages(struct btrfs_root *root, struct file *file, again: for (i = 0; i < num_pages; i++) { pages[i] = find_or_create_page(inode->i_mapping, index + i, - GFP_NOFS); + mask); if (!pages[i]) { faili = i - 1; err = -ENOMEM; diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index ffc42ef..0a8ccdb 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -254,6 +254,7 @@ int __load_free_space_cache(struct btrfs_root *root, struct inode *inode, u64 num_bitmaps; u64 generation; pgoff_t index = 0; + gfp_t mask = btrfs_alloc_write_mask(inode->i_mapping); int ret = 0; INIT_LIST_HEAD(&bitmaps); @@ -310,7 +311,7 @@ int __load_free_space_cache(struct btrfs_root *root, struct inode *inode, if (!num_entries && !num_bitmaps) break; - page = find_or_create_page(inode->i_mapping, index, GFP_NOFS); + page = find_or_create_page(inode->i_mapping, index, mask); if (!page) goto free_cache; @@ -563,6 +564,7 @@ int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode, u64 start, end, len; u64 bytes = 0; u32 crc = ~(u32)0; + gfp_t mask = btrfs_alloc_write_mask(inode->i_mapping); int index = 0, num_pages = 0; int entries = 0; int bitmaps = 0; @@ -612,7 +614,7 @@ int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode, * know and don't freak out. */ while (index < num_pages) { - page = find_or_create_page(inode->i_mapping, index, GFP_NOFS); + page = find_or_create_page(inode->i_mapping, index, mask); if (!page) { int i; diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 2947e94..88e3956 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -3282,6 +3282,7 @@ static int btrfs_truncate_page(struct address_space *mapping, loff_t from) pgoff_t index = from >> PAGE_CACHE_SHIFT; unsigned offset = from & (PAGE_CACHE_SIZE-1); struct page *page; + gfp_t mask = btrfs_alloc_write_mask(mapping); int ret = 0; u64 page_start; u64 page_end; @@ -3294,7 +3295,7 @@ static int btrfs_truncate_page(struct address_space *mapping, loff_t from) ret = -ENOMEM; again: - page = find_or_create_page(mapping, index, GFP_NOFS); + page = find_or_create_page(mapping, index, mask); if (!page) { btrfs_delalloc_release_space(inode, PAGE_CACHE_SIZE); goto out; diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 538f65a..24fd75b 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -843,6 +843,7 @@ static int cluster_pages_for_defrag(struct inode *inode, int i_done; struct btrfs_ordered_extent *ordered; struct extent_state *cached_state = NULL; + gfp_t mask = btrfs_alloc_write_mask(inode->i_mapping); if (isize == 0) return 0; @@ -860,7 +861,7 @@ again: for (i = 0; i < num_pages; i++) { struct page *page; page = find_or_create_page(inode->i_mapping, - start_index + i, GFP_NOFS); + start_index + i, mask); if (!page) break; diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 3ab6740..7fa090f 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -2921,6 +2921,7 @@ static int relocate_file_extent_cluster(struct inode *inode, unsigned long last_index; struct page *page; struct file_ra_state *ra; + gfp_t mask = btrfs_alloc_write_mask(inode->i_mapping); int nr = 0; int ret = 0; @@ -2955,7 +2956,7 @@ static int relocate_file_extent_cluster(struct inode *inode, ra, NULL, index, last_index + 1 - index); page = find_or_create_page(inode->i_mapping, index, - GFP_NOFS); + mask); if (!page) { btrfs_delalloc_release_metadata(inode, PAGE_CACHE_SIZE); -- 2.7.4