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authorJosef Bacik <josef@redhat.com>2011-08-01 20:37:36 +0200
committerChris Mason <chris.mason@oracle.com>2011-08-01 20:37:36 +0200
commit0d10ee2e6deb5c8409ae65b970846344897d5e4e (patch)
tree7072161df34ced133b41cc99e5f868bc8e55a018
parentBtrfs: Remove unused variable 'last_index' in file.c (diff)
downloadlinux-0d10ee2e6deb5c8409ae65b970846344897d5e4e.tar.xz
linux-0d10ee2e6deb5c8409ae65b970846344897d5e4e.zip
Btrfs: don't call writepages from within write_full_page
When doing a writepage we call writepages to try and write out any other dirty pages in the area. This could cause problems where we commit a transaction and then have somebody else dirtying metadata in the area as we could end up writing out a lot more than we care about, which could cause latency on anybody who is waiting for the transaction to completely finish committing. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
-rw-r--r--fs/btrfs/extent_io.c10
1 files changed, 0 insertions, 10 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index a59ebc608ccc..8491712b1dad 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2502,7 +2502,6 @@ int extent_write_full_page(struct extent_io_tree *tree, struct page *page,
struct writeback_control *wbc)
{
int ret;
- struct address_space *mapping = page->mapping;
struct extent_page_data epd = {
.bio = NULL,
.tree = tree,
@@ -2510,18 +2509,9 @@ int extent_write_full_page(struct extent_io_tree *tree, struct page *page,
.extent_locked = 0,
.sync_io = wbc->sync_mode == WB_SYNC_ALL,
};
- struct writeback_control wbc_writepages = {
- .sync_mode = wbc->sync_mode,
- .older_than_this = NULL,
- .nr_to_write = 64,
- .range_start = page_offset(page) + PAGE_CACHE_SIZE,
- .range_end = (loff_t)-1,
- };
ret = __extent_writepage(page, wbc, &epd);
- extent_write_cache_pages(tree, mapping, &wbc_writepages,
- __extent_writepage, &epd, flush_write_bio);
flush_epd_write_bio(&epd);
return ret;
}