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Filename Latest commit message Latest commit date
Wei Yang d9367bd06f mm, page_alloc: enable pcpu_drain with zone capability
drain_all_pages is documented to drain per-cpu pages for a given zone (if
non-NULL).  The current implementation doesn't match the description
though.  It will drain all pcp pages for all zones that happen to have
cached pages on the same cpu as the given zone.  This will lead to
premature pcp cache draining for zones that are not of any interest to the
caller - e.g.  compaction, hwpoison or memory offline.

This forces the page allocator to take locks and potential lock contention
as a result.

There is no real reason for this sub-optimal implementation.  Replace
per-cpu work item with a dedicated structure which contains a pointer to
the zone and pass it over to the worker.  This will get the zone
information all the way down to the worker function and do the right job.

[akpm@linux-foundation.org: avoid 80-col tricks]
[mhocko@suse.com: refactor the whole changelog]
Link: http://lkml.kernel.org/r/20181212142550.61686-1-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-12-28 12:11:51 -08:00
arch lib/ioremap: ensure break-before-make is used for huge p4d mappings 2018-12-28 12:11:50 -08:00
block
certs
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-12-27 13:53:32 -08:00
Documentation mm, proc: report PR_SET_THP_DISABLE in proc 2018-12-28 12:11:50 -08:00
drivers mm/mmu_notifier: use structure for invalidate_range_start/end callback 2018-12-28 12:11:50 -08:00
firmware
fs userfaultfd: clear flag if remap event not enabled 2018-12-28 12:11:51 -08:00
include mm/pageblock: throw compile error if pageblock_bits cannot hold MIGRATE_TYPES 2018-12-28 12:11:51 -08:00
init debugobjects: call debug_objects_mem_init eariler 2018-12-28 12:11:45 -08:00
ipc
kernel mm/mmu_notifier: use structure for invalidate_range_start/end calls v2 2018-12-28 12:11:50 -08:00
lib kmemleak: add config to select auto scan 2018-12-28 12:11:51 -08:00
LICENSES
mm mm, page_alloc: enable pcpu_drain with zone capability 2018-12-28 12:11:51 -08:00
net mm: convert totalram_pages and totalhigh_pages variables to atomic 2018-12-28 12:11:47 -08:00
samples
scripts scripts/tags.sh: add more declarations 2018-12-28 12:11:44 -08:00
security mm: convert totalram_pages and totalhigh_pages variables to atomic 2018-12-28 12:11:47 -08:00
sound
tools tools/vm/page-types.c: fix "kpagecount returned fewer pages than expected" failures 2018-12-28 12:11:50 -08:00
usr
virt mm/mmu_notifier: use structure for invalidate_range_start/end callback 2018-12-28 12:11:50 -08:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-12-27 13:53:32 -08:00
Makefile
README

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 Restructured Text 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.