diff options
| author | Jens Axboe <jens.axboe@oracle.com> | 2009-09-14 07:12:40 -0400 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-09-16 09:18:51 -0400 |
| commit | cfc4ba5365449cb6b5c9f68d755a142f17da1e47 (patch) | |
| tree | 08770de9bb0e658f2e65abd4d10187b3e9f6bb1b /include | |
| parent | f11fcae8401a3175f528e2f7917362645d570111 (diff) | |
writeback: use RCU to protect bdi_list
Now that bdi_writeback_all() no longer handles integrity writeback,
it doesn't have to block anymore. This means that we can switch
bdi_list reader side protection to RCU.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/backing-dev.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index f169bcb90b58..859e797f4576 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h | |||
| @@ -59,6 +59,7 @@ struct bdi_writeback { | |||
| 59 | 59 | ||
| 60 | struct backing_dev_info { | 60 | struct backing_dev_info { |
| 61 | struct list_head bdi_list; | 61 | struct list_head bdi_list; |
| 62 | struct rcu_head rcu_head; | ||
| 62 | unsigned long ra_pages; /* max readahead in PAGE_CACHE_SIZE units */ | 63 | unsigned long ra_pages; /* max readahead in PAGE_CACHE_SIZE units */ |
| 63 | unsigned long state; /* Always use atomic bitops on this */ | 64 | unsigned long state; /* Always use atomic bitops on this */ |
| 64 | unsigned int capabilities; /* Device capabilities */ | 65 | unsigned int capabilities; /* Device capabilities */ |