From: Mike Rapoport <rppt@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>,
Andy Lutomirski <luto@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Borislav Petkov <bp@alien8.de>,
Catalin Marinas <catalin.marinas@arm.com>,
Christopher Lameter <cl@linux.com>,
Dan Williams <dan.j.williams@intel.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
David Hildenbrand <david@redhat.com>,
Elena Reshetova <elena.reshetova@intel.com>,
"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
James Bottomley <jejb@linux.ibm.com>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
Matthew Wilcox <willy@infradead.org>,
Mark Rutland <mark.rutland@arm.com>,
Mike Rapoport <rppt@linux.ibm.com>,
Mike Rapoport <rppt@kernel.org>,
Michael Kerrisk <mtk.manpages@gmail.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Peter Zijlstra <peterz@infradead.org>,
Rick Edgecombe <rick.p.edgecombe@intel.com>,
Roman Gushchin <guro@fb.com>, Shuah Khan <shuah@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Tycho Andersen <tycho@tycho.ws>, Will Deacon <will@kernel.org>,
linux-api@vger.kernel.org, linux-arch@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
linux-nvdimm@lists.01.org, linux-riscv@lists.infradead.org,
x86@kernel.org
Subject: [PATCH v10 6/9] secretmem: add memcg accounting
Date: Mon, 23 Nov 2020 11:54:29 +0200 [thread overview]
Message-ID: <20201123095432.5860-7-rppt@kernel.org> (raw)
In-Reply-To: <20201123095432.5860-1-rppt@kernel.org>
From: Mike Rapoport <rppt@linux.ibm.com>
Account memory consumed by secretmem to memcg. The accounting is updated
when the memory is actually allocated and freed.
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Roman Gushchin <guro@fb.com>
---
mm/filemap.c | 3 ++-
mm/secretmem.c | 36 +++++++++++++++++++++++++++++++++++-
2 files changed, 37 insertions(+), 2 deletions(-)
diff --git a/mm/filemap.c b/mm/filemap.c
index 249cf489f5df..cf7f1dc9f4b8 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -42,6 +42,7 @@
#include <linux/psi.h>
#include <linux/ramfs.h>
#include <linux/page_idle.h>
+#include <linux/secretmem.h>
#include "internal.h"
#define CREATE_TRACE_POINTS
@@ -844,7 +845,7 @@ static noinline int __add_to_page_cache_locked(struct page *page,
page->mapping = mapping;
page->index = offset;
- if (!huge) {
+ if (!huge && !page_is_secretmem(page)) {
error = mem_cgroup_charge(page, current->mm, gfp);
if (error)
goto error;
diff --git a/mm/secretmem.c b/mm/secretmem.c
index d4c44fc568a4..abf6ecdf70cb 100644
--- a/mm/secretmem.c
+++ b/mm/secretmem.c
@@ -18,6 +18,7 @@
#include <linux/memblock.h>
#include <linux/pseudo_fs.h>
#include <linux/secretmem.h>
+#include <linux/memcontrol.h>
#include <linux/set_memory.h>
#include <linux/sched/signal.h>
@@ -50,6 +51,32 @@ struct secretmem_ctx {
static struct cma *secretmem_cma;
+static int secretmem_account_pages(struct page *page, gfp_t gfp, int order)
+{
+ int err;
+
+ err = memcg_kmem_charge_page(page, gfp, order);
+ if (err)
+ return err;
+
+ /*
+ * seceremem caches are unreclaimable kernel allocations, so treat
+ * them as unreclaimable slab memory for VM statistics purposes
+ */
+ mod_node_page_state(page_pgdat(page), NR_SLAB_UNRECLAIMABLE_B,
+ PAGE_SIZE << order);
+
+ return 0;
+}
+
+static void secretmem_unaccount_pages(struct page *page, int order)
+{
+
+ mod_node_page_state(page_pgdat(page), NR_SLAB_UNRECLAIMABLE_B,
+ -PAGE_SIZE << order);
+ memcg_kmem_uncharge_page(page, order);
+}
+
static int secretmem_pool_increase(struct secretmem_ctx *ctx, gfp_t gfp)
{
unsigned long nr_pages = (1 << PMD_PAGE_ORDER);
@@ -62,10 +89,14 @@ static int secretmem_pool_increase(struct secretmem_ctx *ctx, gfp_t gfp)
if (!page)
return -ENOMEM;
- err = set_direct_map_invalid_noflush(page, nr_pages);
+ err = secretmem_account_pages(page, gfp, PMD_PAGE_ORDER);
if (err)
goto err_cma_release;
+ err = set_direct_map_invalid_noflush(page, nr_pages);
+ if (err)
+ goto err_memcg_uncharge;
+
addr = (unsigned long)page_address(page);
err = gen_pool_add(pool, addr, PMD_SIZE, NUMA_NO_NODE);
if (err)
@@ -82,6 +113,8 @@ static int secretmem_pool_increase(struct secretmem_ctx *ctx, gfp_t gfp)
* won't fail
*/
set_direct_map_default_noflush(page, nr_pages);
+err_memcg_uncharge:
+ secretmem_unaccount_pages(page, PMD_PAGE_ORDER);
err_cma_release:
cma_release(secretmem_cma, page, nr_pages);
return err;
@@ -312,6 +345,7 @@ static void secretmem_cleanup_chunk(struct gen_pool *pool,
int i;
set_direct_map_default_noflush(page, nr_pages);
+ secretmem_unaccount_pages(page, PMD_PAGE_ORDER);
for (i = 0; i < nr_pages; i++)
clear_highpage(page + i);
--
2.28.0
next prev parent reply other threads:[~2020-11-23 9:56 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-23 9:54 [PATCH v10 0/9] mm: introduce memfd_secret system call to create "secret" memory areas Mike Rapoport
2020-11-23 9:54 ` [PATCH v10 1/9] mm: add definition of PMD_PAGE_ORDER Mike Rapoport
2020-11-23 9:54 ` [PATCH v10 2/9] mmap: make mlock_future_check() global Mike Rapoport
2020-11-23 9:54 ` [PATCH v10 3/9] set_memory: allow set_direct_map_*_noflush() for multiple pages Mike Rapoport
2020-11-23 9:54 ` [PATCH v10 4/9] mm: introduce memfd_secret system call to create "secret" memory areas Mike Rapoport
2020-11-23 9:54 ` [PATCH v10 5/9] secretmem: use PMD-size pages to amortize direct map fragmentation Mike Rapoport
2020-11-23 9:54 ` Mike Rapoport [this message]
2020-11-23 9:54 ` [PATCH v10 7/9] PM: hibernate: disable when there are active secretmem users Mike Rapoport
2020-11-23 9:54 ` [PATCH v10 8/9] arch, mm: wire up memfd_secret system call were relevant Mike Rapoport
2020-11-23 11:39 ` Catalin Marinas
2020-11-23 9:54 ` [PATCH v10 9/9] secretmem: test: add basic selftest for memfd_secret(2) Mike Rapoport
2020-11-23 15:28 ` [PATCH v10 0/9] mm: introduce memfd_secret system call to create "secret" memory areas Andy Lutomirski
2020-11-24 9:29 ` Mike Rapoport
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