diff options
| author | Pasha Tatashin <pasha.tatashin@soleen.com> | 2024-04-13 02:25:22 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2024-04-15 14:31:48 +0200 |
| commit | 212c5c078d83d780cf2873ca931df135771e8bb7 (patch) | |
| tree | ba8fdc336d0a937a9769022fb671a1965b584784 /Documentation/admin-guide | |
| parent | iommu: observability of the IOMMU allocations (diff) | |
| download | linux-212c5c078d83d780cf2873ca931df135771e8bb7.tar.xz linux-212c5c078d83d780cf2873ca931df135771e8bb7.zip | |
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 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/cgroup-v2.rst | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst index 17e6e9565156..15f80fea8df7 100644 --- a/Documentation/admin-guide/cgroup-v2.rst +++ b/Documentation/admin-guide/cgroup-v2.rst @@ -1432,7 +1432,7 @@ 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 |