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Commit 9bebc09f authored by Yisheng Xie's avatar Yisheng Xie Committed by Linus Torvalds
Browse files

mm/huge_memory.c: fix comment in __split_huge_pmd_locked 

pmd_trans_splitting() was removed after THP refcounting redesign,
therefore related comment should be updated.

Link: http://lkml.kernel.org/r/1512625745-59451-1-git-send-email-xieyisheng1@huawei.com


Signed-off-by: default avatarYisheng Xie <xieyisheng1@huawei.com>
Acked-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 9ac9322d

mm/huge_memory.c

+3 −4
Original line number Diff line number Diff line
@@ -2205,10 +2205,9 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd, 
	 * for the same virtual address to be loaded simultaneously. So instead

	 * of doing "pmd_populate(); flush_pmd_tlb_range();" we first mark the

	 * current pmd notpresent (atomically because here the pmd_trans_huge

	 * and pmd_trans_splitting must remain set at all times on the pmd

	 * until the split is complete for this pmd), then we flush the SMP TLB

	 * and finally we write the non-huge version of the pmd entry with

	 * pmd_populate.

	 * must remain set at all times on the pmd until the split is complete

	 * for this pmd), then we flush the SMP TLB and finally we write the

	 * non-huge version of the pmd entry with pmd_populate.

	 */

	pmdp_invalidate(vma, haddr, pmd);

	pmd_populate(mm, pmd, pgtable);