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| author | Fenghua Yu <fenghua.yu@intel.com> | 2016-11-12 04:02:38 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-11-15 20:35:50 +0300 |
| commit | f410770293a1fbc08906474c24104a7a11943eb6 (patch) | |
| tree | db1ec8f60afcbf6a603bc21b4ceeae47c25194b0 /arch/mips/lib/iomap-pci.c | |
| parent | c7cc0cc10cdecc275211c8749defba6c41aaf5de (diff) | |
| download | linux-f410770293a1fbc08906474c24104a7a11943eb6.tar.xz | |
x86/intel_rdt: Update percpu closid immeditately on CPUs affected by changee
If CPUs are moved to or removed from a rdtgroup, the percpu closid storage
is updated. If tasks running on an affected CPU use the percpu closid then
the PQR_ASSOC MSR is only updated when the task runs through a context
switch. Up to the context switch the CPUs operate on the wrong closid. This
state is potentially unbound.
Make the change immediately effective by invoking a smp function call on
the affected CPUs which stores the new closid in the perpu storage and
calls the rdt_sched_in() function which updates the MSR, if the current
task uses the percpu closid.
[ tglx: Made it work and massaged changelog once more ]
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Cc: "Ravi V Shankar" <ravi.v.shankar@intel.com>
Cc: "Tony Luck" <tony.luck@intel.com>
Cc: "Sai Prakhya" <sai.praneeth.prakhya@intel.com>
Cc: "Vikas Shivappa" <vikas.shivappa@linux.intel.com>
Cc: "Ingo Molnar" <mingo@elte.hu>
Cc: "H. Peter Anvin" <h.peter.anvin@intel.com>
Link: http://lkml.kernel.org/r/1478912558-55514-3-git-send-email-fenghua.yu@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/mips/lib/iomap-pci.c')
0 files changed, 0 insertions, 0 deletions