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authorChris Mason <chris.mason@oracle.com>2008-08-15 15:34:15 -0400
committerChris Mason <chris.mason@oracle.com>2008-09-25 11:04:06 -0400
commit777e6bd706ee40897545463871de5b456fbc46dc (patch)
treecb927528e02234eb7fa6b5d1f14b9367efd755b6 /fs/btrfs
parent0986fe9eac24fd186927c3b87af51d62f8ab92cd (diff)
Btrfs: Transaction commit: don't use filemap_fdatawait
After writing out all the remaining btree blocks in the transaction, the commit code would use filemap_fdatawait to make sure it was all on disk. This means it would wait for blocks written by other procs as well. The new code walks the list of blocks for this transaction again and waits only for those required by this transaction. Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/disk-io.c11
-rw-r--r--fs/btrfs/disk-io.h1
-rw-r--r--fs/btrfs/transaction.c36
3 files changed, 36 insertions, 12 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 9902d29abd0..9601b13c7d7 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -429,7 +429,7 @@ int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
return 0;
}
-static int congested_async(struct btrfs_fs_info *info, int iodone)
+int btrfs_congested_async(struct btrfs_fs_info *info, int iodone)
{
int limit = 256 * info->fs_devices->open_devices;
@@ -438,9 +438,6 @@ static int congested_async(struct btrfs_fs_info *info, int iodone)
if (atomic_read(&info->nr_async_submits) > limit)
return 1;
- limit = 8192 * info->fs_devices->open_devices;
- if (iodone)
- limit = (limit * 3) / 2;
return atomic_read(&info->nr_async_bios) > limit;
}
@@ -454,7 +451,7 @@ static void run_one_async_submit(struct btrfs_work *work)
atomic_dec(&fs_info->nr_async_submits);
if ((async->bio->bi_rw & (1 << BIO_RW)) &&
- !congested_async(fs_info, 1)) {
+ !btrfs_congested_async(fs_info, 1)) {
clear_bdi_congested(&fs_info->bdi, WRITE);
}
async->submit_bio_hook(async->inode, async->rw, async->bio,
@@ -963,7 +960,7 @@ static int btrfs_congested_fn(void *congested_data, int bdi_bits)
struct backing_dev_info *bdi;
if ((bdi_bits & (1 << BDI_write_congested)) &&
- congested_async(info, 0))
+ btrfs_congested_async(info, 0))
return 1;
list_for_each(cur, &info->fs_devices->devices) {
@@ -1844,7 +1841,7 @@ void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr)
struct extent_io_tree *tree;
u64 num_dirty;
u64 start = 0;
- unsigned long thresh = 16 * 1024 * 1024;
+ unsigned long thresh = 2 * 1024 * 1024;
tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree;
if (current_is_pdflush())
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 353c3c50c95..e904a69347a 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -72,4 +72,5 @@ int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode,
int rw, struct bio *bio, int mirror_num,
extent_submit_bio_hook_t *submit_bio_hook);
+int btrfs_congested_async(struct btrfs_fs_info *info, int iodone);
#endif
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 9d3d08e9f8d..6bcb0876f9b 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -303,12 +303,12 @@ int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
int ret;
- int err;
+ int err = 0;
int werr = 0;
struct extent_io_tree *dirty_pages;
struct page *page;
struct inode *btree_inode = root->fs_info->btree_inode;
- u64 start;
+ u64 start = 0;
u64 end;
unsigned long index;
@@ -317,12 +317,15 @@ int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
}
dirty_pages = &trans->transaction->dirty_pages;
while(1) {
- ret = find_first_extent_bit(dirty_pages, 0, &start, &end,
+ ret = find_first_extent_bit(dirty_pages, start, &start, &end,
EXTENT_DIRTY);
if (ret)
break;
- clear_extent_dirty(dirty_pages, start, end, GFP_NOFS);
while(start <= end) {
+ if (btrfs_congested_async(root->fs_info, 0))
+ congestion_wait(WRITE, HZ/10);
+ cond_resched();
+
index = start >> PAGE_CACHE_SHIFT;
start = (u64)(index + 1) << PAGE_CACHE_SHIFT;
page = find_lock_page(btree_inode->i_mapping, index);
@@ -343,7 +346,30 @@ int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
page_cache_release(page);
}
}
- err = filemap_fdatawait(btree_inode->i_mapping);
+ while(1) {
+ ret = find_first_extent_bit(dirty_pages, 0, &start, &end,
+ EXTENT_DIRTY);
+ if (ret)
+ break;
+
+ clear_extent_dirty(dirty_pages, start, end, GFP_NOFS);
+ while(start <= end) {
+ index = start >> PAGE_CACHE_SHIFT;
+ start = (u64)(index + 1) << PAGE_CACHE_SHIFT;
+ page = find_get_page(btree_inode->i_mapping, index);
+ if (!page)
+ continue;
+ if (PageDirty(page)) {
+ lock_page(page);
+ err = write_one_page(page, 0);
+ if (err)
+ werr = err;
+ }
+ wait_on_page_writeback(page);
+ page_cache_release(page);
+ cond_resched();
+ }
+ }
if (err)
werr = err;
return werr;