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@xxxxxxxxxx> --- fs/ext4/super.c | 22 ++++++++++++++++------ 1 files changed, 16 insertions(+), 6 deletions(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 9ea71aa..0a3745b 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -2383,17 +2383,27 @@ 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; + ret = sbi->s_stripe; - if (stripe_width <= sbi->s_blocks_per_group) - return stripe_width; + else if (stripe_width <= sbi->s_blocks_per_group) + ret = stripe_width; - if (stride <= sbi->s_blocks_per_group) - return stride; + else if (stride <= sbi->s_blocks_per_group) + ret = stride; + else + ret = 0; - return 0; + /* + * 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 ret; } /* sysfs supprt */ -- 1.7.3.1 -- 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
