[PATCHv2 19/28] thp: run vma_adjust_trans_huge() outside i_mmap_rwsem
From: Kirill A. Shutemov <hidden>
Date: 2016-02-11 14:28:44
Also in:
lkml
Subsystem:
memory management, memory mapping, the rest · Maintainers:
Andrew Morton, Liam R. Howlett, Lorenzo Stoakes, Linus Torvalds
vma_addjust_trans_huge() splits pmd if it's crossing VMA boundary. During split we munlock the huge page which requires rmap walk. rmap wants to take the lock on its own. Signed-off-by: Kirill A. Shutemov <redacted> --- mm/mmap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index 2f2415a7a688..c9d0c412b6dd 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c@@ -802,6 +802,8 @@ again: remove_next = 1 + (end > next->vm_end); } } + vma_adjust_trans_huge(vma, start, end, adjust_next); + if (file) { mapping = file->f_mapping; root = &mapping->i_mmap;
@@ -822,8 +824,6 @@ again: remove_next = 1 + (end > next->vm_end); } } - vma_adjust_trans_huge(vma, start, end, adjust_next); - anon_vma = vma->anon_vma; if (!anon_vma && adjust_next) anon_vma = next->anon_vma;
--
2.7.0
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