Searched hist:98114659 (Results 1 – 1 of 1) sorted by relevance
/openbmc/linux/fs/btrfs/ |
H A D | transaction.c | 98114659 Fri Sep 14 10:22:38 CDT 2012 Josef Bacik <jbacik@fusionio.com> Btrfs: fix race with freeze and free space inodes
So we start our freeze, somebody comes in and does an fsync() on a file where we have to commit a transaction for whatever reason, and we will deadlock because the freeze is waiting on FS_FREEZE people to stop writing to the file system, but the transaction is waiting for its free space inodes to be written out, which are in turn waiting on sb_start_intwrite while trying to write the file extents. To fix this we'll just skip the sb_start_intwrite() if we TRANS_JOIN_NOLOCK since we're being waited on by a transaction commit so we're safe wrt to freeze and this will keep us from deadlocking. Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com> 98114659 Fri Sep 14 10:22:38 CDT 2012 Josef Bacik <jbacik@fusionio.com> Btrfs: fix race with freeze and free space inodes So we start our freeze, somebody comes in and does an fsync() on a file where we have to commit a transaction for whatever reason, and we will deadlock because the freeze is waiting on FS_FREEZE people to stop writing to the file system, but the transaction is waiting for its free space inodes to be written out, which are in turn waiting on sb_start_intwrite while trying to write the file extents. To fix this we'll just skip the sb_start_intwrite() if we TRANS_JOIN_NOLOCK since we're being waited on by a transaction commit so we're safe wrt to freeze and this will keep us from deadlocking. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
|