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| author | Dan Ehrenberg <dehrenberg@google.com> | 2011-07-17 21:18:51 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-07-17 21:18:51 -0400 |
| commit | 3eb08658431abd65c0fe6855d1860859c2d416f7 (patch) | |
| tree | 5f7d21be65bcec29ac50918cadedd08a62cdf318 /fs/ext4 | |
| parent | d7a1fee135771e6e5185642bdc17df19bbdbcc48 (diff) | |
| download | op-kernel-dev-3eb08658431abd65c0fe6855d1860859c2d416f7.zip op-kernel-dev-3eb08658431abd65c0fe6855d1860859c2d416f7.tar.gz | |
ext4: ignore a stripe width of 1
If the stripe width was set to 1, then this patch will ignore
that stripe width and ext4 will act as if the stripe width
were 0 with respect to optimizing allocations.
Signed-off-by: Dan Ehrenberg <dehrenberg@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/super.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 7910e61..143d763 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -2384,17 +2384,25 @@ static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); unsigned long stripe_width = le32_to_cpu(sbi->s_es->s_raid_stripe_width); + int ret; if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) - return sbi->s_stripe; - - if (stripe_width <= sbi->s_blocks_per_group) - return stripe_width; + ret = sbi->s_stripe; + else if (stripe_width <= sbi->s_blocks_per_group) + ret = stripe_width; + else if (stride <= sbi->s_blocks_per_group) + ret = stride; + else + ret = 0; - if (stride <= sbi->s_blocks_per_group) - return stride; + /* + * If the stripe width is 1, this makes no sense and + * we set it to 0 to turn off stripe handling code. + */ + if (ret <= 1) + ret = 0; - return 0; + return ret; } /* sysfs supprt */ |
