https://github.com/torvalds/linux
Revision 2af8ff291848cc4b1cce24b6c943394eb2c761e8 authored by Hugh Dickins on 30 November 2018, 22:10:35 UTC, committed by Linus Torvalds on 30 November 2018, 22:56:15 UTC
Huge tmpfs testing reminds us that there is no __GFP_ZERO in the gfp
flags khugepaged uses to allocate a huge page - in all common cases it
would just be a waste of effort - so collapse_shmem() must remember to
clear out any holes that it instantiates.
The obvious place to do so, where they are put into the page cache tree,
is not a good choice: because interrupts are disabled there. Leave it
until further down, once success is assured, where the other pages are
copied (before setting PageUptodate).
Link: http://lkml.kernel.org/r/alpine.LSU.2.11.1811261525080.2275@eggly.anvils
Fixes: f3f0e1d2150b2 ("khugepaged: add support of collapse for tmpfs/shmem pages")
Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: <stable@vger.kernel.org> [4.8+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent aaa52e3
Tip revision: 2af8ff291848cc4b1cce24b6c943394eb2c761e8 authored by Hugh Dickins on 30 November 2018, 22:10:35 UTC
mm/khugepaged: collapse_shmem() remember to clear holes
mm/khugepaged: collapse_shmem() remember to clear holes
Tip revision: 2af8ff2
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| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 31 bytes |
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| COPYING | -rw-r--r-- | 423 bytes |
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| MAINTAINERS | -rw-r--r-- | 472.8 KB |
| Makefile | -rw-r--r-- | 59.7 KB |
| README | -rw-r--r-- | 727 bytes |
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