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author | Jason Gunthorpe <jgg@mellanox.com> | 2019-05-23 11:08:28 -0300 |
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committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-06-18 12:11:16 -0300 |
commit | 47f245985a4f3e270b1e4f28aa49f4c939527981 (patch) | |
tree | ba0dcb5d040a33a32c50a9dbad6f467cc65f248d /tools/perf/scripts/python/stackcollapse.py | |
parent | 157816f3775f5c4df2c68ef0e3a100ada974aa2e (diff) |
mm/hmm: Hold on to the mmget for the lifetime of the range
Range functions like hmm_range_snapshot() and hmm_range_fault() call
find_vma, which requires hodling the mmget() and the mmap_sem for the mm.
Make this simpler for the callers by holding the mmget() inside the range
for the lifetime of the range. Other functions that accept a range should
only be called if the range is registered.
This has the side effect of directly preventing hmm_release() from
happening while a range is registered. That means range->dead cannot be
false during the lifetime of the range, so remove dead and
hmm_mirror_mm_is_alive() entirely.
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: Ralph Campbell <rcampbell@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Philip Yang <Philip.Yang@amd.com>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions