x86/intel_rdt: Change closid type from int to u32 (0734ded1) · Commits · 戴 / test

OS associates a CLOSid(Class of service id) to a task by writing the high 32 bits of per CPU IA32_PQR_ASSOC MSR when a task is scheduled in. CPUID.(EAX=10H, ECX=1):EDX[15:0] enumerates the max CLOSID supported and it is zero indexed. Hence change the type to u32 from int. Signed-off-by:

Vikas Shivappa <vikas.shivappa@linux.intel.com> Signed-off-by:

Thomas Gleixner <tglx@linutronix.de> Cc: ravi.v.shankar@intel.com Cc: tony.luck@intel.com Cc: fenghua.yu@intel.com Cc: peterz@infradead.org Cc: eranian@google.com Cc: vikas.shivappa@intel.com Cc: ak@linux.intel.com Cc: davidcc@google.com Cc: reinette.chatre@intel.com Link: http://lkml.kernel.org/r/1501017287-28083-15-git-send-email-vikas.shivappa@linux.intel.com

arch/x86/include/asm/intel_rdt_sched.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -46,7 +46,7 @@ static inline void intel_rdt_sched_in(void)
		{
		if (static_branch_likely(&rdt_alloc_enable_key)) {
		struct intel_pqr_state *state = this_cpu_ptr(&pqr_state);
		int closid;
		u32 closid;

		/*
		* If this task has a closid assigned, use it.

arch/x86/kernel/cpu/intel_rdt.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -72,7 +72,7 @@ struct mongroup {
		struct rdtgroup {
		struct kernfs_node *kn;
		struct list_head rdtgroup_list;
		int closid;
		u32 closid;
		struct cpumask cpu_mask;
		int flags;
		atomic_t waitcount;

arch/x86/kernel/cpu/intel_rdt_rdtgroup.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -77,7 +77,7 @@ static void closid_init(void)

		static int closid_alloc(void)
		{
		int closid = ffs(closid_free_map);
		u32 closid = ffs(closid_free_map);

		if (closid == 0)
		return -ENOSPC;

include/linux/sched.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -899,7 +899,7 @@ struct task_struct {
		struct list_head cg_list;
		#endif
		#ifdef CONFIG_INTEL_RDT
		int closid;
		u32 closid;
		#endif
		#ifdef CONFIG_FUTEX
		struct robust_list_head __user *robust_list;

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