p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

iommu/amd: Move aperture_range.offset to another cache-line 

Moving it before the pte_pages array puts in into the same
cache-line as the spin-lock and the bitmap array pointer.
This should safe a cache-miss.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2015-12-21 16:28:45 +01:00
parent a0f51447f4
commit ae62d49c7a
1 changed files with 1 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/iommu/amd_iommu.c
View File

@ -124,6 +124,7 @@ struct aperture_range {
/* address allocation bitmap */ /* address allocation bitmap */
unsigned long *bitmap; unsigned long *bitmap;
unsigned long offset;
/* /*
* Array of PTE pages for the aperture. In this array we save all the * Array of PTE pages for the aperture. In this array we save all the
@ -132,8 +133,6 @@ struct aperture_range {
* just calculate its address in constant time. * just calculate its address in constant time.
*/ */
u64 *pte_pages[64]; u64 *pte_pages[64];
unsigned long offset;
}; };
/* /*