proc: rewrite stable_page_flags()

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Reduce the usage of PageFlag tests and reduce the number of
compound_head() calls.

For multi-page folios, we'll now show all pages as having the flags that
apply to them, e.g.  if it's dirty, all pages will have the dirty flag set
instead of just the head page.  The mapped flag is still per page, as is
the hwpoison flag.

[willy@infradead.org: fix up some bits vs masks]
  Link: https://lkml.kernel.org/r/20240403173112.1450721-1-willy@infradead.org
[willy@infradead.org: fix warnings]
  Link: https://lkml.kernel.org/r/ZhBPtCYfSuFuUMEz@casper.infradead.org
Link: https://lkml.kernel.org/r/20240326171045.410737-11-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Svetly Todorov <svetly.todorov@memverge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

...

This commit is contained in:

Matthew Wilcox (Oracle) 2024-03-26 17:10:32 +00:00 • committed by Andrew Morton

parent 4dc7d37370

commit dee3d0bef2

4 changed files with 42 additions and 38 deletions

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73

fs/proc/page.c

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4

include/linux/huge_mm.h

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2

include/linux/page-flags.h

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5

tools/cgroup/memcg_slabinfo.py

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