From cad321ad529400c6ab24c501a67c3be720a0744c Mon Sep 17 00:00:00 2001 From: Chris Mason Date: Wed, 17 Dec 2008 14:51:42 -0500 Subject: Btrfs: shift all end_io work to thread pools bio_end_io for reads without checksumming on and btree writes were happening without using async thread pools. This means the extent_io.c code had to use spin_lock_irq and friends on the rb tree locks for extent state. There were some irq safe vs unsafe lock inversions between the delallock lock and the extent state locks. This patch gets rid of them by moving all end_io code into the thread pools. To avoid contention and deadlocks between the data end_io processing and the metadata end_io processing yet another thread pool is added to finish off metadata writes. Signed-off-by: Chris Mason --- fs/btrfs/inode.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'fs/btrfs/inode.c') diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 0577e77e661..068bad46338 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -1282,8 +1282,8 @@ static int __btrfs_submit_bio_done(struct inode *inode, int rw, struct bio *bio, } /* - * extent_io.c submission hook. This does the right thing for csum calculation on write, - * or reading the csums from the tree before a read + * extent_io.c submission hook. This does the right thing for csum calculation + * on write, or reading the csums from the tree before a read */ static int btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, int mirror_num, unsigned long bio_flags) @@ -1292,11 +1292,11 @@ static int btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, int ret = 0; int skip_sum; + skip_sum = btrfs_test_flag(inode, NODATASUM); + ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0); BUG_ON(ret); - skip_sum = btrfs_test_flag(inode, NODATASUM); - if (!(rw & (1 << BIO_RW))) { if (bio_flags & EXTENT_BIO_COMPRESSED) { return btrfs_submit_compressed_read(inode, bio, @@ -1648,13 +1648,13 @@ static int btrfs_io_failed_hook(struct bio *failed_bio, failrec->logical, failrec->len); failrec->last_mirror++; if (!state) { - spin_lock_irq(&BTRFS_I(inode)->io_tree.lock); + spin_lock(&BTRFS_I(inode)->io_tree.lock); state = find_first_extent_bit_state(&BTRFS_I(inode)->io_tree, failrec->start, EXTENT_LOCKED); if (state && state->start != failrec->start) state = NULL; - spin_unlock_irq(&BTRFS_I(inode)->io_tree.lock); + spin_unlock(&BTRFS_I(inode)->io_tree.lock); } if (!state || failrec->last_mirror > num_copies) { set_state_private(failure_tree, failrec->start, 0); -- cgit v1.2.3