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...Signed-off-by: Pan Xinhui <xinhui.pan at linux.vnet.ibm.com> > --- > ?arch/powerpc/include/asm/spinlock.h | 18 ++++++++++++++++++ > ?1 file changed, 18 insertions(+) >? > diff --git a/arch/powerpc/include/asm/spinlock.h b/arch/powerpc/include/asm/spinlock.h > index 523673d..3ac9fcb 100644 > --- a/arch/powerpc/include/asm/spinlock.h > +++ b/arch/powerpc/include/asm/spinlock.h > @@ -52,6 +52,24 @@ > ?#define SYNC_IO > ?#endif > ? > +/* > + * This support kernel to check if one cpu is preempted or not. > + * Then we can fix some lock holder preemption...

...Signed-off-by: Pan Xinhui <xinhui.pan at linux.vnet.ibm.com> > --- > ?arch/powerpc/include/asm/spinlock.h | 18 ++++++++++++++++++ > ?1 file changed, 18 insertions(+) >? > diff --git a/arch/powerpc/include/asm/spinlock.h b/arch/powerpc/include/asm/spinlock.h > index 523673d..3ac9fcb 100644 > --- a/arch/powerpc/include/asm/spinlock.h > +++ b/arch/powerpc/include/asm/spinlock.h > @@ -52,6 +52,24 @@ > ?#define SYNC_IO > ?#endif > ? > +/* > + * This support kernel to check if one cpu is preempted or not. > + * Then we can fix some lock holder preemption...

...lt;peterz at infradead.org> Signed-off-by: Pan Xinhui <xinhui.pan at linux.vnet.ibm.com> --- arch/powerpc/include/asm/spinlock.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/arch/powerpc/include/asm/spinlock.h b/arch/powerpc/include/asm/spinlock.h index 523673d..3ac9fcb 100644 --- a/arch/powerpc/include/asm/spinlock.h +++ b/arch/powerpc/include/asm/spinlock.h @@ -52,6 +52,24 @@ #define SYNC_IO #endif +/* + * This support kernel to check if one cpu is preempted or not. + * Then we can fix some lock holder preemption issue. + */ +#ifdef CONFIG_PPC_PSERIES +#defi...

...lt;peterz at infradead.org> Signed-off-by: Pan Xinhui <xinhui.pan at linux.vnet.ibm.com> --- arch/powerpc/include/asm/spinlock.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/arch/powerpc/include/asm/spinlock.h b/arch/powerpc/include/asm/spinlock.h index 523673d..3ac9fcb 100644 --- a/arch/powerpc/include/asm/spinlock.h +++ b/arch/powerpc/include/asm/spinlock.h @@ -52,6 +52,24 @@ #define SYNC_IO #endif +/* + * This support kernel to check if one cpu is preempted or not. + * Then we can fix some lock holder preemption issue. + */ +#ifdef CONFIG_PPC_PSERIES +#defi...

change fomr v1: a simplier definition of default vcpu_is_preempted skip mahcine type check on ppc, and add config. remove dedicated macro. add one patch to drop overload of rwsem_spin_on_owner and mutex_spin_on_owner. add more comments thanks boqun and Peter's suggestion. This patch set aims to fix lock holder preemption issues. test-case: perf record -a perf bench sched messaging -g

change fomr v1: a simplier definition of default vcpu_is_preempted skip mahcine type check on ppc, and add config. remove dedicated macro. add one patch to drop overload of rwsem_spin_on_owner and mutex_spin_on_owner. add more comments thanks boqun and Peter's suggestion. This patch set aims to fix lock holder preemption issues. test-case: perf record -a perf bench sched messaging -g

change from v2: no code change, fix typos, update some comments change from v1: a simplier definition of default vcpu_is_preempted skip mahcine type check on ppc, and add config. remove dedicated macro. add one patch to drop overload of rwsem_spin_on_owner and mutex_spin_on_owner. add more comments thanks boqun and Peter's suggestion. This patch set aims to fix lock holder preemption

change from v2: no code change, fix typos, update some comments change from v1: a simplier definition of default vcpu_is_preempted skip mahcine type check on ppc, and add config. remove dedicated macro. add one patch to drop overload of rwsem_spin_on_owner and mutex_spin_on_owner. add more comments thanks boqun and Peter's suggestion. This patch set aims to fix lock holder preemption