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| author | Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2012-10-08 23:30:12 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-09 07:22:30 (GMT) |
| commit | 8e72033f2a489b6c98c4e3c7cc281b1afd6cb85c (patch) | |
| tree | 9ac78daf640471e00f3f0fbe22f6c24fb95b8817 /arch/s390/mm/gup.c | |
| parent | 46dcde735c9d8953bbd8d105ca6779e5b5300c28 (diff) | |
| download | linux-fsl-qoriq-8e72033f2a489b6c98c4e3c7cc281b1afd6cb85c.tar.xz | |
thp: make MADV_HUGEPAGE check for mm->def_flags
This adds a check to hugepage_madvise(), to refuse MADV_HUGEPAGE if
VM_NOHUGEPAGE is set in mm->def_flags. On s390, the VM_NOHUGEPAGE flag
will be set in mm->def_flags for kvm processes, to prevent any future thp
mappings. In order to also prevent MADV_HUGEPAGE on such an mm,
hugepage_madvise() should check mm->def_flags.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Hillf Danton <dhillf@gmail.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/s390/mm/gup.c')
0 files changed, 0 insertions, 0 deletions