aboutsummaryrefslogtreecommitdiff
path: root/tools/perf/scripts/python/stat-cpi.py
diff options
context:
space:
mode:
authorBaolin Wang <[email protected]>2021-11-10 20:32:37 -0800
committerLinus Torvalds <[email protected]>2021-11-11 09:34:35 -0800
commit0ef024621417fa3fcdeb2c3320f90ee34e18a5d9 (patch)
treedd99593b7465520a2148ed124d1e36312fec938f /tools/perf/scripts/python/stat-cpi.py
parent252220dab9d4e4aa61f87b729468e8ac68fcc8bb (diff)
mm: migrate: simplify the file-backed pages validation when migrating its mapping
There is no need to validate the file-backed page's refcount before trying to freeze the page's expected refcount, instead we can rely on the folio_ref_freeze() to validate if the page has the expected refcount before migrating its mapping. Moreover we are always under the page lock when migrating the page mapping, which means nowhere else can remove it from the page cache, so we can remove the xas_load() validation under the i_pages lock. Link: https://lkml.kernel.org/r/[email protected] Link: https://lkml.kernel.org/r/df4c129fd8e86a95dbc55f4663d77441cc0d3bd1.1629447552.git.baolin.wang@linux.alibaba.com Signed-off-by: Baolin Wang <[email protected]> Suggested-by: Matthew Wilcox <[email protected]> Cc: Yang Shi <[email protected]> Cc: Alistair Popple <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/stat-cpi.py')
0 files changed, 0 insertions, 0 deletions