diff options
| author | Pasha Tatashin <pasha.tatashin@soleen.com> | 2024-04-13 00:25:22 +0000 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2024-04-15 14:31:48 +0200 |
| commit | 212c5c078d83d780cf2873ca931df135771e8bb7 (patch) | |
| tree | ba8fdc336d0a937a9769022fb671a1965b584784 /Documentation/filesystems/proc.rst | |
| parent | bd3520a93a84cd8c3897283e5891a9106fcf5acc (diff) | |
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/filesystems/proc.rst')
| -rw-r--r-- | Documentation/filesystems/proc.rst | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst index c6a6b9df2104..707e39280a9a 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. |