linux-stable.git/Documentation/admin-guide/mm, branch v5.18

Docs/admin-guide/mm/damon/usage: document DAMON sysfs interface

2022-03-22T22:57:13+00:00

This commit adds detailed usage of DAMON sysfs interface in the
admin-guide document for DAMON.

Link: https://lkml.kernel.org/r/20220228081314.5770-13-sj@kernel.org
Signed-off-by: SeongJae Park 
Cc: David Rientjes 
Cc: Greg Kroah-Hartman 
Cc: Jonathan Corbet 
Cc: Shuah Khan 
Cc: Xin Hao 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Docs/damon: update outdated term 'regions update interval'

2022-03-22T22:57:12+00:00

Before DAMON is merged in the mainline, the concept of 'regions update
interval' has generalized to be used as the time interval for update of
any monitoring operations related data structure, but the document has not
updated properly.  This commit updates the document for better
consistency.

Link: https://lkml.kernel.org/r/20220222170100.17068-4-sj@kernel.org
Signed-off-by: SeongJae Park 
Cc: Jonathan Corbet 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Docs/admin-guide/mm/damon/usage: update for changed initail_regions file input

2022-03-22T22:57:12+00:00

A previous commit made init_regions debugfs file to use target index
instead of target id for specifying the target of the init regions.  This
commit updates the usage document to reflect the change.

Link: https://lkml.kernel.org/r/20211230100723.2238-3-sj@kernel.org
Signed-off-by: SeongJae Park 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm/zswap.c: allow handling just same-value filled pages

2022-03-22T22:57:11+00:00

Zswap has an ability to efficiently store same-value filled pages, which
can be turned on and off using the "same_filled_pages_enabled"
parameter.

However, there is currently no way to enable just this (lightweight)
functionality, while not making use of the whole compressed page storage
machinery.

Add a "non_same_filled_pages_enabled" parameter which allows disabling
handling of pages that aren't same-value filled.  This way zswap can be
run in such lightweight same-value filled pages only mode.

Link: https://lkml.kernel.org/r/7dbafa963e8bab43608189abbe2067f4b9287831.1641247624.git.maciej.szmigiero@oracle.com
Signed-off-by: Maciej S. Szmigiero 
Cc: Seth Jennings 
Cc: Dan Streetman 
Cc: Vitaly Wool 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

proc: fix documentation and description of pagemap

2022-03-05T19:08:33+00:00

Since bit 57 was exported for uffd-wp write-protected (commit
fb8e37f35a2f: "mm/pagemap: export uffd-wp protection information"),
fixing it can reduce some unnecessary confusion.

Link: https://lkml.kernel.org/r/20220301044538.3042713-1-yun.zhou@windriver.com
Fixes: fb8e37f35a2fe1 ("mm/pagemap: export uffd-wp protection information")
Signed-off-by: Yun Zhou 
Reviewed-by: Peter Xu 
Cc: Jonathan Corbet 
Cc: Tiberiu A Georgescu 
Cc: Florian Schmidt 
Cc: Ivan Teterevkov 
Cc: SeongJae Park 
Cc: Yang Shi 
Cc: David Hildenbrand 
Cc: Axel Rasmussen 
Cc: Miaohe Lin 
Cc: Andrea Arcangeli 
Cc: Colin Cross 
Cc: Alistair Popple 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Docs/admin-guide/mm/damon/usage: update for schemes statistics

2022-01-15T14:30:33+00:00

This updates DAMON debugfs interface for statistics of schemes
successfully applied regions and time/space quota limit exceeds counts.

Link: https://lkml.kernel.org/r/20211210150016.35349-7-sj@kernel.org
Signed-off-by: SeongJae Park 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Docs/admin-guide/mm/damon/reclaim: document statistics parameters

2022-01-15T14:30:33+00:00

This adds descriptions for the DAMON_RECLAIM statistics parameters.

Link: https://lkml.kernel.org/r/20211210150016.35349-5-sj@kernel.org
Signed-off-by: SeongJae Park 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Docs/admin-guide/mm/damon/usage: update for kdamond_pid and (mk|rm)_contexts

2022-01-15T14:30:32+00:00

The DAMON debugfs usage document is missing descriptions for
'kdamond_pid', 'mk_contexts', and 'rm_contexts' debugfs files.  This
commit adds those.

Link: https://lkml.kernel.org/r/20211209131806.19317-6-sj@kernel.org
Signed-off-by: SeongJae Park 
Cc: Jonathan Corbet 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Docs/admin-guide/mm/damon/usage: mention tracepoint at the beginning

2022-01-15T14:30:32+00:00

To get detailed monitoring results from the user space, users need to
use the damon_aggregated tracepoint.  This commit adds a brief mention
of it at the beginning of the usage document.

Link: https://lkml.kernel.org/r/20211209131806.19317-5-sj@kernel.org
Signed-off-by: SeongJae Park 
Cc: Jonathan Corbet 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Docs/admin-guide/mm/damon/usage: remove redundant information

2022-01-15T14:30:32+00:00

DAMON usage document mentions DAMON user space tool and programming
interface twice.  This commit integrates those and remove unnecessary
part.

Link: https://lkml.kernel.org/r/20211209131806.19317-4-sj@kernel.org
Signed-off-by: SeongJae Park 
Cc: Jonathan Corbet 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds