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| author | Andrea Arcangeli | 2011-01-14 00:47:06 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2011-01-14 02:32:45 +0100 |
| commit | ce83d2174ea9c3d72d5821cf3ebc974e36391bf7 (patch) | |
| tree | 5e31167f84110551cf00ed3335b2cc3af317b33a /mm/Kconfig | |
| parent | thp: add numa awareness to hugepage allocations (diff) | |
| download | kernel-qcow2-linux-ce83d2174ea9c3d72d5821cf3ebc974e36391bf7.tar.gz kernel-qcow2-linux-ce83d2174ea9c3d72d5821cf3ebc974e36391bf7.tar.xz kernel-qcow2-linux-ce83d2174ea9c3d72d5821cf3ebc974e36391bf7.zip | |
thp: allocate memory in khugepaged outside of mmap_sem write mode
This tries to be more friendly to filesystem in userland, with userland
backends that allocate memory in the I/O paths and that could deadlock if
khugepaged holds the mmap_sem write mode of the userland backend while
allocating memory. Memory allocation may wait for writeback I/O
completion from the daemon that may be blocked in the mmap_sem read mode
if a page fault happens and the daemon wasn't using mlock for the memory
required for the I/O submission and completion.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/Kconfig')
0 files changed, 0 insertions, 0 deletions