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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-04-15 00:46:37 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-04-15 00:46:37 +0300 |
| commit | fabd5a8d24fb5b430f71d3d3608696a7d5e9d720 (patch) | |
| tree | 5a0fac8ee602c16a4c270daebed6db534ecac979 /Documentation | |
| parent | 883af1f8e8788b99c5cd6797219bca44571775c9 (diff) | |
| parent | 79727019ce3da234d877ec0cb6a3985f001e2b2d (diff) | |
| download | linux-fabd5a8d24fb5b430f71d3d3608696a7d5e9d720.tar.xz | |
Merge tag 'x86_cache_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 resource control updates from Borislav Petkov:
- Add return value descriptions to several internal functions,
addressing kernel-doc complaints
- Add the x86 maintainer mailing list to the resctrl section so they
are automatically included in patch submissions, and reference the
applicable contribution rules document
- Allow users to apply a single Capacity Bitmask to all cache domains
at once using '*' as a shorthand, instead of having to specify each
domain individually. This is particularly user-friendly on high
core-count systems with many cache clusters
- When a user provides a non-existent domain ID while configuring cache
allocation, ensure the failure reason is properly reported to the
user rather than silently returning an error with a misleading "ok"
status
* tag 'x86_cache_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
fs/resctrl: Add missing return value descriptions
MAINTAINERS: Update resctrl entry
fs/resctrl: Add "*" shorthand to set io_alloc CBM for all domains
fs/resctrl: Report invalid domain ID when parsing io_alloc_cbm
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/resctrl.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/filesystems/resctrl.rst b/Documentation/filesystems/resctrl.rst index ba609f8d4de5..b003bed339fd 100644 --- a/Documentation/filesystems/resctrl.rst +++ b/Documentation/filesystems/resctrl.rst @@ -215,6 +215,14 @@ related to allocation: # cat /sys/fs/resctrl/info/L3/io_alloc_cbm 0=00ff;1=000f + An ID of "*" configures all domains with the provided CBM. + + Example on a system that does not require a minimum number of consecutive bits in the mask:: + + # echo "*=0" > /sys/fs/resctrl/info/L3/io_alloc_cbm + # cat /sys/fs/resctrl/info/L3/io_alloc_cbm + 0=0;1=0 + When CDP is enabled "io_alloc_cbm" associated with the CDP_DATA and CDP_CODE resources may reflect the same values. For example, values read from and written to /sys/fs/resctrl/info/L3DATA/io_alloc_cbm may be reflected by |