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| author | Kirill A. Shutemov | 2017-04-13 23:56:17 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2017-04-14 03:24:20 +0200 |
| commit | 0a85e51d37645e9ce57e5e1a30859e07810ed07c (patch) | |
| tree | b56010bad2b9f938904f3fc10b9b7e9bbe21e81e /include/linux/irqnr.h | |
| parent | z3fold: fix page locking in z3fold_alloc() (diff) | |
| download | kernel-qcow2-linux-0a85e51d37645e9ce57e5e1a30859e07810ed07c.tar.gz kernel-qcow2-linux-0a85e51d37645e9ce57e5e1a30859e07810ed07c.tar.xz kernel-qcow2-linux-0a85e51d37645e9ce57e5e1a30859e07810ed07c.zip | |
thp: reduce indentation level in change_huge_pmd()
Patch series "thp: fix few MADV_DONTNEED races"
For MADV_DONTNEED to work properly with huge pages, it's critical to not
clear pmd intermittently unless you hold down_write(mmap_sem).
Otherwise MADV_DONTNEED can miss the THP which can lead to userspace
breakage.
See example of such race in commit message of patch 2/4.
All these races are found by code inspection. I haven't seen them
triggered. I don't think it's worth to apply them to stable@.
This patch (of 4):
Restructure code in preparation for a fix.
Link: http://lkml.kernel.org/r/20170302151034.27829-2-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/irqnr.h')
0 files changed, 0 insertions, 0 deletions