On Mon, 11 Oct 2021 at 11:07, Xie Yongji <xieyongji@xxxxxxxxxxxxx> wrote:
>
> Recently we found the performance of small direct writes is bad
> when writeback_cache enabled. This is because we need to get
> attrs from userspace in fuse_update_get_attr() on each write.
> The timeout for the attributes doesn't work since every direct write
> will invalidate the attrs in fuse_direct_IO().
>
> To fix it, this patch tries to avoid invalidating attrs if writeback_cache
> is enabled since we should trust local size/ctime/mtime in this case.
Hi,
Thanks for the patch.
Just pushed an update to
git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.gitt#for-next
(9ca3f8697158 ("fuse: selective attribute invalidation")) that should
fix this behavior.
Could you please test?
Thanks,
Miklos
