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| author | David S. Miller <davem@davemloft.net> | 2011-10-07 13:38:43 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-10-07 13:38:43 -0400 |
| commit | 88c5100c28b02c4b2b2c6f6fafbbd76d90f698b9 (patch) | |
| tree | 08c4399e0341f7eb0ccb24e15f2cab687275c2a4 /fs/btrfs/file.c | |
| parent | 8083f0fc969d9b5353061a7a6f963405057e26b1 (diff) | |
| parent | 3ee72ca99288f1de95ec9c570e43f531c8799f06 (diff) | |
| download | talos-op-linux-88c5100c28b02c4b2b2c6f6fafbbd76d90f698b9.tar.gz talos-op-linux-88c5100c28b02c4b2b2c6f6fafbbd76d90f698b9.zip | |
Merge branch 'master' of github.com:davem330/net
Conflicts:
net/batman-adv/soft-interface.c
Diffstat (limited to 'fs/btrfs/file.c')
| -rw-r--r-- | fs/btrfs/file.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index a381cd22f518..e4e57d59edb7 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1036,11 +1036,13 @@ out: * on error we return an unlocked page and the error value * on success we return a locked page and 0 */ -static int prepare_uptodate_page(struct page *page, u64 pos) +static int prepare_uptodate_page(struct page *page, u64 pos, + bool force_uptodate) { int ret = 0; - if ((pos & (PAGE_CACHE_SIZE - 1)) && !PageUptodate(page)) { + if (((pos & (PAGE_CACHE_SIZE - 1)) || force_uptodate) && + !PageUptodate(page)) { ret = btrfs_readpage(NULL, page); if (ret) return ret; @@ -1061,7 +1063,7 @@ static int prepare_uptodate_page(struct page *page, u64 pos) static noinline int prepare_pages(struct btrfs_root *root, struct file *file, struct page **pages, size_t num_pages, loff_t pos, unsigned long first_index, - size_t write_bytes) + size_t write_bytes, bool force_uptodate) { struct extent_state *cached_state = NULL; int i; @@ -1086,10 +1088,11 @@ again: } if (i == 0) - err = prepare_uptodate_page(pages[i], pos); + err = prepare_uptodate_page(pages[i], pos, + force_uptodate); if (i == num_pages - 1) err = prepare_uptodate_page(pages[i], - pos + write_bytes); + pos + write_bytes, false); if (err) { page_cache_release(pages[i]); faili = i - 1; @@ -1158,6 +1161,7 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file, size_t num_written = 0; int nrptrs; int ret = 0; + bool force_page_uptodate = false; nrptrs = min((iov_iter_count(i) + PAGE_CACHE_SIZE - 1) / PAGE_CACHE_SIZE, PAGE_CACHE_SIZE / @@ -1200,7 +1204,8 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file, * contents of pages from loop to loop */ ret = prepare_pages(root, file, pages, num_pages, - pos, first_index, write_bytes); + pos, first_index, write_bytes, + force_page_uptodate); if (ret) { btrfs_delalloc_release_space(inode, num_pages << PAGE_CACHE_SHIFT); @@ -1217,12 +1222,15 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file, if (copied < write_bytes) nrptrs = 1; - if (copied == 0) + if (copied == 0) { + force_page_uptodate = true; dirty_pages = 0; - else + } else { + force_page_uptodate = false; dirty_pages = (copied + offset + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; + } /* * If we had a short copy we need to release the excess delaloc |
