Re: powerpc/mm/hugetlb: Update hugetlb related locks
From: Michael Ellerman <hidden>
Date: 2018-06-04 14:11:31
On Fri, 2018-06-01 at 08:24:24 UTC, "Aneesh Kumar K.V" wrote:
With split pmd page table lock enabled, we don't use mm->page_table_lock when
updating pmd entries. This patch update hugetlb path to use the right lock
when inserting huge page directory entries into page table.
ex: if we are using hugepd and inserting hugepd entry at the pmd level, we
use pmd_lockptr, which based on config can be split pmd lock.
For update huge page directory entries itself we use mm->page_table_lock. We
do have a helper huge_pte_lockptr() for that.
Fixes: 675d99529 ("powerpc/book3s64: Enable split pmd ptlock")
Signed-off-by: Aneesh Kumar K.V <redacted>Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/ed515b6898c36775ddd99ff9ffeda4 cheers