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| author | Pasha Tatashin <pasha.tatashin@soleen.com> | 2024-04-13 03:25:22 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2024-04-15 15:31:48 +0300 |
| commit | 212c5c078d83d780cf2873ca931df135771e8bb7 (patch) | |
| tree | ba8fdc336d0a937a9769022fb671a1965b584784 /drivers/iommu/iommu-pages.h | |
| parent | bd3520a93a84cd8c3897283e5891a9106fcf5acc (diff) | |
| download | linux-212c5c078d83d780cf2873ca931df135771e8bb7.tar.xz | |
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.
There is a difference between GFP_ACCOUNT and what NR_IOMMU_PAGES shows.
GFP_ACCOUNT is set only where it makes sense to charge to user
processes, i.e. IOMMU Page Tables, but there more IOMMU shared data
that should not really be charged to a specific process.
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Acked-by: David Rientjes <rientjes@google.com>
Tested-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20240413002522.1101315-12-pasha.tatashin@soleen.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/iommu-pages.h')
| -rw-r--r-- | drivers/iommu/iommu-pages.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/iommu/iommu-pages.h b/drivers/iommu/iommu-pages.h index 1264b0f6b6c3..82ebf0033081 100644 --- a/drivers/iommu/iommu-pages.h +++ b/drivers/iommu/iommu-pages.h @@ -30,6 +30,7 @@ static inline void __iommu_alloc_account(struct page *page, int order) const long pgcnt = 1l << order; mod_node_page_state(page_pgdat(page), NR_IOMMU_PAGES, pgcnt); + mod_lruvec_page_state(page, NR_SECONDARY_PAGETABLE, pgcnt); } /** @@ -42,6 +43,7 @@ static inline void __iommu_free_account(struct page *page, int order) const long pgcnt = 1l << order; mod_node_page_state(page_pgdat(page), NR_IOMMU_PAGES, -pgcnt); + mod_lruvec_page_state(page, NR_SECONDARY_PAGETABLE, -pgcnt); } /** |