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| author | Jens Axboe <jens.axboe@oracle.com> | 2009-09-14 15:12:40 +0400 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-09-16 17:18:51 +0400 |
| commit | cfc4ba5365449cb6b5c9f68d755a142f17da1e47 (patch) | |
| tree | 08770de9bb0e658f2e65abd4d10187b3e9f6bb1b /mm/page-writeback.c | |
| parent | f11fcae8401a3175f528e2f7917362645d570111 (diff) | |
| download | linux-cfc4ba5365449cb6b5c9f68d755a142f17da1e47.tar.xz | |
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 'mm/page-writeback.c')
| -rw-r--r-- | mm/page-writeback.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index abc648f5de00..12c3d843ce93 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -315,7 +315,7 @@ int bdi_set_min_ratio(struct backing_dev_info *bdi, unsigned int min_ratio) { int ret = 0; - spin_lock(&bdi_lock); + spin_lock_bh(&bdi_lock); if (min_ratio > bdi->max_ratio) { ret = -EINVAL; } else { @@ -327,7 +327,7 @@ int bdi_set_min_ratio(struct backing_dev_info *bdi, unsigned int min_ratio) ret = -EINVAL; } } - spin_unlock(&bdi_lock); + spin_unlock_bh(&bdi_lock); return ret; } @@ -339,14 +339,14 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned max_ratio) if (max_ratio > 100) return -EINVAL; - spin_lock(&bdi_lock); + spin_lock_bh(&bdi_lock); if (bdi->min_ratio > max_ratio) { ret = -EINVAL; } else { bdi->max_ratio = max_ratio; bdi->max_prop_frac = (PROP_FRAC_BASE * max_ratio) / 100; } - spin_unlock(&bdi_lock); + spin_unlock_bh(&bdi_lock); return ret; } |