drop i_block_reservation_lock before vfs_dq_reserve_block(). this patch fix http://bugzilla.kernel.org/show_bug.cgi?id=14739 Signed-off-by: Dmitry Monakhov <dmonakhov@xxxxxxxxxx> --- fs/ext4/inode.c | 29 ++++++++++++++++------------- 1 files changed, 16 insertions(+), 13 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 942e183..f693768 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1852,19 +1852,8 @@ repeat: md_needed = mdblocks - EXT4_I(inode)->i_reserved_meta_blocks; total = md_needed + nrblocks; - /* - * Make quota reservation here to prevent quota overflow - * later. Real quota accounting is done at pages writeout - * time. - */ - if (vfs_dq_reserve_block(inode, total)) { - spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); - return -EDQUOT; - } - if (ext4_claim_free_blocks(sbi, total)) { spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); - vfs_dq_release_reservation_block(inode, total); if (ext4_should_retry_alloc(inode->i_sb, &retries)) { yield(); goto repeat; @@ -1872,10 +1861,24 @@ repeat: return -ENOSPC; } EXT4_I(inode)->i_reserved_data_blocks += nrblocks; - EXT4_I(inode)->i_reserved_meta_blocks = mdblocks; + EXT4_I(inode)->i_reserved_meta_blocks += md_needed; + spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); + + /* + * Make quota reservation here to prevent quota overflow + * later. Real quota accounting is done at pages writeout + * time. + */ + if (!vfs_dq_reserve_block(inode, total)) + return 0; /* success */ + /* Quota reservation has failed, revert inode's reservation */ + percpu_counter_sub(&sbi->s_dirtyblocks_counter, total); + spin_lock(&EXT4_I(inode)->i_block_reservation_lock); + EXT4_I(inode)->i_reserved_data_blocks -= nrblocks; + EXT4_I(inode)->i_reserved_meta_blocks -= md_needed; spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); - return 0; /* success */ + return -EDQUOT; } static void ext4_da_release_space(struct inode *inode, int to_free) -- 1.6.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
