From: SeongJae Park <sj38.park@gmail.com>
To: akpm@linux-foundation.org
Cc: SeongJae Park <sjpark@amazon.de>,
Jonathan.Cameron@Huawei.com, acme@kernel.org,
alexander.shishkin@linux.intel.com, amit@kernel.org,
benh@kernel.crashing.org, brendanhiggins@google.com,
corbet@lwn.net, david@redhat.com, dwmw@amazon.com,
elver@google.com, fan.du@intel.com, foersleo@amazon.de,
greg@kroah.com, gthelen@google.com, guoju.fgj@alibaba-inc.com,
jgowans@amazon.com, mgorman@suse.de, minchan@kernel.org,
mingo@redhat.com, namhyung@kernel.org, peterz@infradead.org,
riel@surriel.com, rientjes@google.com, rostedt@goodmis.org,
rppt@kernel.org, shakeelb@google.com, shuah@kernel.org,
sj38.park@gmail.com, snu@zelle79.org, vbabka@suse.cz,
vdavydov.dev@gmail.com, zgf574564920@gmail.com,
linux-damon@amazon.com, linux-mm@kvack.org,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [RFC v2 01/14] mm/damon/paddr: Support the pageout scheme
Date: Tue, 8 Jun 2021 11:52:41 +0000 [thread overview]
Message-ID: <20210608115254.11930-2-sj38.park@gmail.com> (raw)
In-Reply-To: <20210608115254.11930-1-sj38.park@gmail.com>
From: SeongJae Park <sjpark@amazon.de>
This commit makes the DAMON primitives for physical address space to
support the pageout action for DAMON-based Operation Schemes. IOW, now
the users can implement their own data access-aware reclamations for
whole system using DAMOS.
Signed-off-by: SeongJae Park <sjpark@amazon.de>
---
mm/damon/paddr.c | 38 +++++++++++++++++++++++++++++++++++++-
mm/damon/prmtv-common.c | 2 +-
mm/damon/prmtv-common.h | 2 ++
3 files changed, 40 insertions(+), 2 deletions(-)
diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index b92b07a3ce53..303db372e53b 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -7,6 +7,9 @@
#define pr_fmt(fmt) "damon-pa: " fmt
+#include <linux/swap.h>
+
+#include "../internal.h"
#include "prmtv-common.h"
/*
@@ -85,6 +88,39 @@ bool damon_pa_target_valid(void *t)
return true;
}
+int damon_pa_apply_scheme(struct damon_ctx *ctx, struct damon_target *t,
+ struct damon_region *r, struct damos *scheme)
+{
+ unsigned long addr;
+ LIST_HEAD(page_list);
+
+ if (scheme->action != DAMOS_PAGEOUT)
+ return -EINVAL;
+
+ for (addr = r->ar.start; addr < r->ar.end; addr += PAGE_SIZE) {
+ struct page *page = damon_get_page(PHYS_PFN(addr));
+
+ if (!page)
+ continue;
+
+ ClearPageReferenced(page);
+ test_and_clear_page_young(page);
+ if (isolate_lru_page(page)) {
+ put_page(page);
+ continue;
+ }
+ if (PageUnevictable(page)) {
+ putback_lru_page(page);
+ } else {
+ list_add(&page->lru, &page_list);
+ put_page(page);
+ }
+ }
+ reclaim_pages(&page_list);
+ cond_resched();
+ return 0;
+}
+
void damon_pa_set_primitives(struct damon_ctx *ctx)
{
ctx->primitive.init = NULL;
@@ -94,5 +130,5 @@ void damon_pa_set_primitives(struct damon_ctx *ctx)
ctx->primitive.reset_aggregated = NULL;
ctx->primitive.target_valid = damon_pa_target_valid;
ctx->primitive.cleanup = NULL;
- ctx->primitive.apply_scheme = NULL;
+ ctx->primitive.apply_scheme = damon_pa_apply_scheme;
}
diff --git a/mm/damon/prmtv-common.c b/mm/damon/prmtv-common.c
index 08e9318d67ed..01c1c1b37859 100644
--- a/mm/damon/prmtv-common.c
+++ b/mm/damon/prmtv-common.c
@@ -14,7 +14,7 @@
* The body of this function is stolen from the 'page_idle_get_page()'. We
* steal rather than reuse it because the code is quite simple.
*/
-static struct page *damon_get_page(unsigned long pfn)
+struct page *damon_get_page(unsigned long pfn)
{
struct page *page = pfn_to_online_page(pfn);
diff --git a/mm/damon/prmtv-common.h b/mm/damon/prmtv-common.h
index 939c41af6b59..ba0c4eecbb79 100644
--- a/mm/damon/prmtv-common.h
+++ b/mm/damon/prmtv-common.h
@@ -18,6 +18,8 @@
/* Get a random number in [l, r) */
#define damon_rand(l, r) (l + prandom_u32_max(r - l))
+struct page *damon_get_page(unsigned long pfn);
+
void damon_va_mkold(struct mm_struct *mm, unsigned long addr);
bool damon_va_young(struct mm_struct *mm, unsigned long addr,
unsigned long *page_sz);
--
2.17.1
next prev parent reply other threads:[~2021-06-08 11:54 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-08 11:52 [RFC v2 00/14] Introduce DAMON-based Proactive Reclamation SeongJae Park
2021-06-08 11:52 ` SeongJae Park [this message]
2021-06-08 11:52 ` [RFC v2 02/14] mm/damon/damos: Make schemes aggressiveness controllable SeongJae Park
2021-06-08 11:52 ` [RFC v2 03/14] damon/core/schemes: Skip already charged targets and regions SeongJae Park
2021-06-08 11:52 ` [RFC v2 04/14] mm/damon/dbgfs: Support schemes speed limit SeongJae Park
2021-06-08 11:52 ` [RFC v2 05/14] mm/damon/selftests: " SeongJae Park
2021-06-08 11:52 ` [RFC v2 06/14] mm/damon/schemes: Prioritize regions within " SeongJae Park
2021-06-08 11:52 ` [RFC v2 07/14] mm/damon/vaddr,paddr: Support pageout prioritization SeongJae Park
2021-06-08 11:52 ` [RFC v2 08/14] mm/damon/dbgfs: Support prioritization weights SeongJae Park
2021-06-08 11:52 ` [RFC v2 09/14] tools/selftests/damon: Update for regions prioritization of schemes SeongJae Park
2021-06-08 11:52 ` [RFC v2 10/14] mm/damon/schemes: Activate schemes based on a watermarks mechanism SeongJae Park
2021-06-08 11:52 ` [RFC v2 11/14] mm/damon/dbgfs: Support watermarks SeongJae Park
2021-06-08 11:52 ` [RFC v2 12/14] selftests/damon: " SeongJae Park
2021-06-08 11:52 ` [RFC v2 13/14] mm/damon: Introduce DAMON-based reclamation SeongJae Park
2021-06-08 11:52 ` [RFC v2 14/14] Documentation/admin-guide/mm/damon: Add a document for DAMON_RECLAIM SeongJae Park
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