mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-04-09 14:45:27 +00:00
Code Issues Packages Projects Releases Wiki Activity

mm/damon: introduce DAMOS filter type hugepage_size

Browse Source 
Patch series "mm/damon: add support for hugepage_size DAMOS filter", v5.

hugepage_size DAMOS filter can be used to gather statistics to check if
memory regions of specific access tempratures are backed by hugepages of a
size in a specific range.  This filter can help to observe and prove the
effectivenes of different schemes for shrinking/collapsing hugepages.


This patch (of 4):

This is to gather statistics to check if memory regions of specific access
tempratures are backed by pages of a size in a specific range.  This
filter can help to observe and prove the effectivenes of different schemes
for shrinking/collapsing hugepages.

[sj@kernel.org: add kernel-doc comment for damos_filter->sz_range]
  Link: https://lkml.kernel.org/r/20250218223058.52459-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20250211124437.278873-1-usamaarif642@gmail.com
Link: https://lkml.kernel.org/r/20250211124437.278873-2-usamaarif642@gmail.com
Signed-off-by: Usama Arif <usamaarif642@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Usama Arif <usamaarif642@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Usama Arif 2025-02-11 12:43:40 +00:00 committed by Andrew Morton
parent 026e8b55aa
commit 0431c42622
4 changed files with 24 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
include/linux/damon.h
View File

@ -35,6 +35,16 @@ struct damon_addr_range {
unsigned long end;
};
/**
* struct damon_size_range - Represents size for filter to operate on [@min, @max].
* @min: Min size (inclusive).
* @max: Max size (inclusive).
*/
struct damon_size_range {
unsigned long min;
unsigned long max;
};
/**
* struct damon_region - Represents a monitoring target region.
* @ar: The address range of the region.
@ -326,6 +336,7 @@ struct damos_stat {
* @DAMOS_FILTER_TYPE_ANON: Anonymous pages.
* @DAMOS_FILTER_TYPE_MEMCG: Specific memcg's pages.
* @DAMOS_FILTER_TYPE_YOUNG: Recently accessed pages.
* @DAMOS_FILTER_TYPE_HUGEPAGE_SIZE: Page is part of a hugepage.
* @DAMOS_FILTER_TYPE_ADDR: Address range.
* @DAMOS_FILTER_TYPE_TARGET: Data Access Monitoring target.
* @NR_DAMOS_FILTER_TYPES: Number of filter types.
@ -345,6 +356,7 @@ enum damos_filter_type {
DAMOS_FILTER_TYPE_ANON,
DAMOS_FILTER_TYPE_MEMCG,
DAMOS_FILTER_TYPE_YOUNG,
DAMOS_FILTER_TYPE_HUGEPAGE_SIZE,
DAMOS_FILTER_TYPE_ADDR,
DAMOS_FILTER_TYPE_TARGET,
NR_DAMOS_FILTER_TYPES,
@ -360,6 +372,7 @@ enum damos_filter_type {
* @target_idx: Index of the &struct damon_target of
* &damon_ctx->adaptive_targets if @type is
* DAMOS_FILTER_TYPE_TARGET.
* @sz_range: Size range if @type is DAMOS_FILTER_TYPE_HUGEPAGE_SIZE.
* @list: List head for siblings.
*
* Before applying the &damos->action to a memory region, DAMOS checks if each
@ -376,6 +389,7 @@ struct damos_filter {
unsigned short memcg_id;
struct damon_addr_range addr_range;
int target_idx;
struct damon_size_range sz_range;
};
struct list_head list;
};

3
mm/damon/core.c
View File

@ -777,6 +777,9 @@ static void damos_commit_filter_arg(
case DAMOS_FILTER_TYPE_TARGET:
dst->target_idx = src->target_idx;
break;
case DAMOS_FILTER_TYPE_HUGEPAGE_SIZE:
dst->sz_range = src->sz_range;
break;
default:
break;
}

6
mm/damon/paddr.c
View File

@ -211,6 +211,7 @@ static bool damos_pa_filter_match(struct damos_filter *filter,
{
bool matched = false;
struct mem_cgroup *memcg;
size_t folio_sz;
switch (filter->type) {
case DAMOS_FILTER_TYPE_ANON:
@ -230,6 +231,11 @@ static bool damos_pa_filter_match(struct damos_filter *filter,
if (matched)
damon_folio_mkold(folio);
break;
case DAMOS_FILTER_TYPE_HUGEPAGE_SIZE:
folio_sz = folio_size(folio);
matched = filter->sz_range.min <= folio_sz &&
folio_sz <= filter->sz_range.max;
break;
default:
break;
}

1
mm/damon/sysfs-schemes.c
View File

@ -329,6 +329,7 @@ static const char * const damon_sysfs_scheme_filter_type_strs[] = {
"anon",
"memcg",
"young",
"hugepage_size",
"addr",
"target",
};