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| author |   Heiko Carstens <hca@linux.ibm.com> | 2020-09-07 17:20:05 +0200 |
|---|---|---|
| committer |   Vasily Gorbik <gor@linux.ibm.com> | 2020-09-14 11:38:34 +0200 |
| commit | da1694ad9e8d13484c8b4ecaabde0bd7b958442a (patch) | |
| tree | bd504d95a0fa035b362274044c6a0f1441b593d0 /tools/perf/scripts/python/stackcollapse.py | |
| parent | s390/mm,ptdump: hold memory hotplug lock while walking for kernel page table dump (diff) | |
| download | wireguard-linux-da1694ad9e8d13484c8b4ecaabde0bd7b958442a.tar.xz wireguard-linux-da1694ad9e8d13484c8b4ecaabde0bd7b958442a.zip | |
s390/mm,ptdump: hold cpa mutex while walking for kernel page table dump
This is currently only preventing that outdated information is
provided to user space. A concurrent split of huge/large pages does
modify the kernel page tables, however either the huge/large mapping
is reported or the split area is being walked.
This "fixes" also only a potential future bug, since split pages could
also be merged again if page permissions are the same for larger
memory areas.
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions