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Hugh Dickins 3865301dc5 mm: optimize lru_note_cost() by adding lru_note_cost_unlock_irq()
Dropping a lock, just to demand it again for an afterthought, cannot be
good if contended: convert lru_note_cost() to lru_note_cost_unlock_irq().

[hughd@google.com: delete unneeded comment]
  Link: https://lkml.kernel.org/r/dbf9352a-1ed9-a021-c0c7-9309ac73e174@google.com
Link: https://lkml.kernel.org/r/21100102-51b6-79d5-03db-1bb7f97fa94c@google.com
Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Roman Gushchin <roman.gushchin@linux.dev>
Tested-by: Roman Gushchin <roman.gushchin@linux.dev>
Reviewed-by: Shakeel Butt <shakeel.butt@linux.dev>
Cc: David Hildenbrand <david@redhat.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
History 2025-07-24 19:12:28 -07:00
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Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.