Justin T Pryzby <justinp@norchemlab.com> wrote:
> On Thu, Oct 08, 2009 at 10:49:37AM -0700, Joshua D. Drake wrote:
>> Did your scheduler change between the kernel versions?
> No, it's deadline for both.
How about write barriers? I had a kernel upgrade which turned them on
for xfs, with unfortunate performance impacts. The xfs docs
explicitly recommend disabling it if you have a battery backed cache
in your RAID controller.
-Kevin