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SubjectRe: [PATCH v5 2/4] x86/ldt: Make modify_ldt synchronous
On Mon, Jul 27, 2015 at 10:29:39PM -0700, Andy Lutomirski wrote:
> modify_ldt has questionable locking and does not synchronize
> threads. Improve it: redesign the locking and synchronize all
> threads' LDTs using an IPI on all modifications.
>
> This will dramatically slow down modify_ldt in multithreaded
> programs, but there shouldn't be any multithreaded programs that
> care about modify_ldt's performance in the first place.
>
> Cc: stable@vger.kernel.org
> Signed-off-by: Andy Lutomirski <luto@kernel.org>

I've stared a lot at this one these days, I guess a

Reviewed-by: Borislav Petkov <bp@suse.de>

is in order.

--
Regards/Gruss,
Boris.

ECO tip #101: Trim your mails when you reply.
--


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