From: Omar Sandoval
I was seeing disk flushes still happening when I mounted a Btrfs
filesystem with nobarrier for testing. This is because we use FUA to
write out the first super block, and on devices without FUA support, the
block layer translates FUA to a flush. Even on devices supporting true
On 2017年12月06日 14:54, Omar Sandoval wrote:
> From: Omar Sandoval
>
> I was seeing disk flushes still happening when I mounted a Btrfs
> filesystem with nobarrier for testing. This is because we use FUA to
> write out the first super block, and on devices without FUA support, the
> block layer t
On Tue, Dec 05, 2017 at 10:54:02PM -0800, Omar Sandoval wrote:
> From: Omar Sandoval
>
> I was seeing disk flushes still happening when I mounted a Btrfs
> filesystem with nobarrier for testing. This is because we use FUA to
> write out the first super block, and on devices without FUA support, t