lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20231128204938.1453583-15-pasha.tatashin@soleen.com>
Date: Tue, 28 Nov 2023 20:49:36 +0000
From: Pasha Tatashin <pasha.tatashin@...een.com>
To: akpm@...ux-foundation.org,
	alex.williamson@...hat.com,
	alim.akhtar@...sung.com,
	alyssa@...enzweig.io,
	asahi@...ts.linux.dev,
	baolu.lu@...ux.intel.com,
	bhelgaas@...gle.com,
	cgroups@...r.kernel.org,
	corbet@....net,
	david@...hat.com,
	dwmw2@...radead.org,
	hannes@...xchg.org,
	heiko@...ech.de,
	iommu@...ts.linux.dev,
	jasowang@...hat.com,
	jernej.skrabec@...il.com,
	jgg@...pe.ca,
	jonathanh@...dia.com,
	joro@...tes.org,
	kevin.tian@...el.com,
	krzysztof.kozlowski@...aro.org,
	kvm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-doc@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	linux-rockchip@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	linux-sunxi@...ts.linux.dev,
	linux-tegra@...r.kernel.org,
	lizefan.x@...edance.com,
	marcan@...can.st,
	mhiramat@...nel.org,
	mst@...hat.com,
	m.szyprowski@...sung.com,
	netdev@...r.kernel.org,
	pasha.tatashin@...een.com,
	paulmck@...nel.org,
	rdunlap@...radead.org,
	robin.murphy@....com,
	samuel@...lland.org,
	suravee.suthikulpanit@....com,
	sven@...npeter.dev,
	thierry.reding@...il.com,
	tj@...nel.org,
	tomas.mudrunka@...il.com,
	vdumpa@...dia.com,
	virtualization@...ts.linux.dev,
	wens@...e.org,
	will@...nel.org,
	yu-cheng.yu@...el.com
Subject: [PATCH 14/16] iommu: account IOMMU allocated memory

In order to be able to limit the amount of memory that is allocated
by IOMMU subsystem, the memory must be accounted.

Account IOMMU as part of the secondary pagetables as it was discussed
at LPC.

The value of SecPageTables now contains mmeory allocation by IOMMU
and KVM.

Signed-off-by: Pasha Tatashin <pasha.tatashin@...een.com>
---
 Documentation/admin-guide/cgroup-v2.rst | 2 +-
 Documentation/filesystems/proc.rst      | 4 ++--
 drivers/iommu/iommu-pages.h             | 2 ++
 include/linux/mmzone.h                  | 2 +-
 4 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index 3f85254f3cef..e004e05a7cde 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -1418,7 +1418,7 @@ PAGE_SIZE multiple when read back.
 	  sec_pagetables
 		Amount of memory allocated for secondary page tables,
 		this currently includes KVM mmu allocations on x86
-		and arm64.
+		and arm64 and IOMMU page tables.
 
 	  percpu (npn)
 		Amount of memory used for storing per-cpu kernel
diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst
index 49ef12df631b..86f137a9b66b 100644
--- a/Documentation/filesystems/proc.rst
+++ b/Documentation/filesystems/proc.rst
@@ -1110,8 +1110,8 @@ KernelStack
 PageTables
               Memory consumed by userspace page tables
 SecPageTables
-              Memory consumed by secondary page tables, this currently
-              currently includes KVM mmu allocations on x86 and arm64.
+              Memory consumed by secondary page tables, this currently includes
+              KVM mmu and IOMMU allocations on x86 and arm64.
 NFS_Unstable
               Always zero. Previous counted pages which had been written to
               the server, but has not been committed to stable storage.
diff --git a/drivers/iommu/iommu-pages.h b/drivers/iommu/iommu-pages.h
index 69895a355c0c..cdd257585284 100644
--- a/drivers/iommu/iommu-pages.h
+++ b/drivers/iommu/iommu-pages.h
@@ -27,6 +27,7 @@ static inline void __iommu_alloc_account(struct page *pages, int order)
 	const long pgcnt = 1l << order;
 
 	mod_node_page_state(page_pgdat(pages), NR_IOMMU_PAGES, pgcnt);
+	mod_lruvec_page_state(pages, NR_SECONDARY_PAGETABLE, pgcnt);
 }
 
 /**
@@ -39,6 +40,7 @@ static inline void __iommu_free_account(struct page *pages, int order)
 	const long pgcnt = 1l << order;
 
 	mod_node_page_state(page_pgdat(pages), NR_IOMMU_PAGES, -pgcnt);
+	mod_lruvec_page_state(pages, NR_SECONDARY_PAGETABLE, -pgcnt);
 }
 
 /**
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 1a4d0bba3e8b..aaabb385663c 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -199,7 +199,7 @@ enum node_stat_item {
 	NR_KERNEL_SCS_KB,	/* measured in KiB */
 #endif
 	NR_PAGETABLE,		/* used for pagetables */
-	NR_SECONDARY_PAGETABLE, /* secondary pagetables, e.g. KVM pagetables */
+	NR_SECONDARY_PAGETABLE, /* secondary pagetables, KVM & IOMMU */
 #ifdef CONFIG_IOMMU_SUPPORT
 	NR_IOMMU_PAGES,		/* # of pages allocated by IOMMU */
 #endif
-- 
2.43.0.rc2.451.g8631bc7472-goog


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ