search for: __get_cpu_var

...OL(cpu_16bit_stack); +#else +DEFINE_PER_CPU(unsigned int, xen_x86_cr0); +EXPORT_PER_CPU_SYMBOL(xen_x86_cr0); #endif static int cachesize_override __cpuinitdata = -1; @@ -681,6 +684,7 @@ old_gdt: cpu_gdt_descr->size = GDT_SIZE - 1; cpu_gdt_descr->address = (unsigned long)gdt; #else + __get_cpu_var(xen_x86_cr0) = raw_read_cr0(); if (cpu == 0 && cpu_gdt_descr->address == 0) { gdt = (struct desc_struct *)alloc_bootmem_pages(PAGE_SIZE); /* alloc_bootmem_pages panics on failure, so no check */ --- a/arch/i386/kernel/process-xen.c +++ b/arch/i386/kernel/process-xen.c @@ -641,6 +...

Hi Ingo, This series of patches implements a number of improvements to the softlockup watchdog and its users. They are: 1. Make the watchdog ignore stolen time When running under a hypervisor, the kernel may lose an arbitrary amount of time as "stolen time". This may cause the softlockup watchdog to trigger spruiously. Xen and VMI implement sched_clock() as measuring unstolen time,

Hi Ingo, This series of patches implements a number of improvements to the softlockup watchdog and its users. They are: 1. Make the watchdog ignore stolen time When running under a hypervisor, the kernel may lose an arbitrary amount of time as "stolen time". This may cause the softlockup watchdog to trigger spruiously. Xen and VMI implement sched_clock() as measuring unstolen time,

...ith gcc-6: non-fatal.c: In function 'init_nonfatal_mce_checker': non-fatal.c:103:2: error: statement is indented as if it were guarded by... [-Werror=misleading-indentation] switch (c->x86_vendor) { ^~~~~~ non-fatal.c:97:5: note: ...this 'if' clause, but it is not if ( __get_cpu_var(poll_bankmask) == NULL ) ^~ I was unable to reproduce (xen builds cleanly for me with "6.0.0 20160117 (experimental) [trunk revision 232481]") but looking at the code the issue above is clearly real. Correctly reindent the if statement. This file uses Linux coding style (infact th...

...alloon.c @@ -430,8 +430,13 @@ static enum bp_state decrease_reservation(unsigned long nr_pages, gfp_t gfp) /* No more mappings: invalidate P2M and add to balloon. */ for (i = 0; i < nr_pages; i++) { pfn = mfn_to_pfn(frame_list[i]); - __set_phys_to_machine(pfn, - pfn_to_mfn(page_to_pfn(__get_cpu_var(balloon_scratch_page)))); + if (!xen_feature(XENFEAT_auto_translated_physmap)) { + unsigned long p; + struct page *pg; + pg = __get_cpu_var(balloon_scratch_page); + p = page_to_pfn(pg); + __set_phys_to_machine(pfn, pfn_to_mfn(p)); + } balloon_append(pfn_to_page(pfn)); } -- 1.7.1...

...es(void) } #endif /* CONFIG_PM */ +#if defined(CONFIG_PAGE_DISCARD_LIST) +DEFINE_PER_CPU(struct list_head, page_discard_list); + +static void __page_shrink_discards(void *info) +{ + static DEFINE_SPINLOCK(splice_lock); + struct list_head *discard_list = info; + struct list_head *cpu_list = &__get_cpu_var(page_discard_list); + + if (list_empty(cpu_list)) + return; + spin_lock(&splice_lock); + list_splice_init(cpu_list, discard_list); + spin_unlock(&splice_lock); +} + +unsigned long page_shrink_discards(void) +{ + struct list_head pages_to_free = LIST_HEAD_INIT(pages_to_free); + struct page...

...es(void) } #endif /* CONFIG_PM */ +#if defined(CONFIG_PAGE_DISCARD_LIST) +DEFINE_PER_CPU(struct list_head, page_discard_list); + +static void __page_shrink_discards(void *info) +{ + static DEFINE_SPINLOCK(splice_lock); + struct list_head *discard_list = info; + struct list_head *cpu_list = &__get_cpu_var(page_discard_list); + + if (list_empty(cpu_list)) + return; + spin_lock(&splice_lock); + list_splice_init(cpu_list, discard_list); + spin_unlock(&splice_lock); +} + +unsigned long page_shrink_discards(void) +{ + struct list_head pages_to_free = LIST_HEAD_INIT(pages_to_free); + struct page...

...de); } vmi_ops; /* @@ -545,6 +546,26 @@ vmi_startup_ipi_hook(int phys_apicid, un } #endif +static void vmi_set_lazy_mode(enum paravirt_lazy_mode mode) +{ + static DEFINE_PER_CPU(int, lazy_mode); + + if (!vmi_ops.set_lazy_mode) + return; + + /* Modes should never nest or overlap */ + BUG_ON(__get_cpu_var(lazy_mode) && !(mode == PARAVIRT_LAZY_NONE || + mode == PARAVIRT_LAZY_FLUSH)); + + if (mode == PARAVIRT_LAZY_FLUSH) { + vmi_ops.set_lazy_mode(0); + vmi_ops.set_lazy_mode(__get_cpu_var(lazy_mode)); + } else { + vmi_ops.set_lazy_mode(mode); + __get_cpu_var(lazy_mode) = mode; + }...

...de); } vmi_ops; /* @@ -545,6 +546,26 @@ vmi_startup_ipi_hook(int phys_apicid, un } #endif +static void vmi_set_lazy_mode(enum paravirt_lazy_mode mode) +{ + static DEFINE_PER_CPU(int, lazy_mode); + + if (!vmi_ops.set_lazy_mode) + return; + + /* Modes should never nest or overlap */ + BUG_ON(__get_cpu_var(lazy_mode) && !(mode == PARAVIRT_LAZY_NONE || + mode == PARAVIRT_LAZY_FLUSH)); + + if (mode == PARAVIRT_LAZY_FLUSH) { + vmi_ops.set_lazy_mode(0); + vmi_ops.set_lazy_mode(__get_cpu_var(lazy_mode)); + } else { + vmi_ops.set_lazy_mode(mode); + __get_cpu_var(lazy_mode) = mode; + }...

drivers/xen/balloon.c:50: WARNING: Use #include <linux/uaccess.h> instead of <asm/uaccess.h> drivers/xen/balloon.c:158: ERROR: else should follow close brace '}' drivers/xen/balloon.c:277: ERROR: do not use assignment in if condition drivers/xen/balloon.c:293: ERROR: code indent should use tabs where possible drivers/xen/balloon.c:364: ERROR: that open brace { should be on the

drivers/xen/balloon.c:50: WARNING: Use #include <linux/uaccess.h> instead of <asm/uaccess.h> drivers/xen/balloon.c:158: ERROR: else should follow close brace '}' drivers/xen/balloon.c:277: ERROR: do not use assignment in if condition drivers/xen/balloon.c:293: ERROR: code indent should use tabs where possible drivers/xen/balloon.c:364: ERROR: that open brace { should be on the

drivers/xen/balloon.c:50: WARNING: Use #include <linux/uaccess.h> instead of <asm/uaccess.h> drivers/xen/balloon.c:158: ERROR: else should follow close brace '}' drivers/xen/balloon.c:277: ERROR: do not use assignment in if condition drivers/xen/balloon.c:293: ERROR: code indent should use tabs where possible drivers/xen/balloon.c:364: ERROR: that open brace { should be on the

...ed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/xen/multicalls.c b/arch/x86/xen/multicalls.c index 0d82003..5270407 100644 --- a/arch/x86/xen/multicalls.c +++ b/arch/x86/xen/multicalls.c @@ -195,9 +195,10 @@ void xen_mc_callback(void (*fn)(void *), void *data) struct mc_buffer *b = &__get_cpu_var(mc_buffer); struct callback *cb; - if (b->cbidx == MC_BATCH) { + if (b->cbidx >= MC_BATCH) { trace_xen_mc_flush_reason(XEN_MC_FL_CALLBACK); xen_mc_flush(); + return; } trace_xen_mc_callback(fn, data); -- 1.7.9.5

...ed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/xen/multicalls.c b/arch/x86/xen/multicalls.c index 0d82003..5270407 100644 --- a/arch/x86/xen/multicalls.c +++ b/arch/x86/xen/multicalls.c @@ -195,9 +195,10 @@ void xen_mc_callback(void (*fn)(void *), void *data) struct mc_buffer *b = &__get_cpu_var(mc_buffer); struct callback *cb; - if (b->cbidx == MC_BATCH) { + if (b->cbidx >= MC_BATCH) { trace_xen_mc_flush_reason(XEN_MC_FL_CALLBACK); xen_mc_flush(); + return; } trace_xen_mc_callback(fn, data); -- 1.7.9.5

Here's couple of patches to improve the softlockup watchdog. The first changes the softlockup timer from using jiffies to sched_clock() as a timebase. Xen and VMI implement sched_clock() as counting unstolen time, so time stolen by the hypervisor won't cause the watchdog to bite. The second adds per-cpu enable flags for the watchdog timer. This allows the timer to be disabled when the

Here's couple of patches to improve the softlockup watchdog. The first changes the softlockup timer from using jiffies to sched_clock() as a timebase. Xen and VMI implement sched_clock() as counting unstolen time, so time stolen by the hypervisor won't cause the watchdog to bite. The second adds per-cpu enable flags for the watchdog timer. This allows the timer to be disabled when the

As Michael mentioned, set affinity and select queue will not work very well when CPU IDs are not consecutive, this can happen with hot unplug. Fix this bug by traversal the online CPUs, and create a per cpu variable to find the mapping from CPU to the preferable virtual-queue. Cc: Rusty Russell <rusty at rustcorp.com.au> Cc: "Michael S. Tsirkin" <mst at redhat.com> Cc: Jason

As Michael mentioned, set affinity and select queue will not work very well when CPU IDs are not consecutive, this can happen with hot unplug. Fix this bug by traversal the online CPUs, and create a per cpu variable to find the mapping from CPU to the preferable virtual-queue. Cc: Rusty Russell <rusty at rustcorp.com.au> Cc: "Michael S. Tsirkin" <mst at redhat.com> Cc: Jason

...c @@ -552,24 +552,22 @@ vmi_startup_ipi_hook(int phys_apicid, un } #endif -static void vmi_set_lazy_mode(enum paravirt_lazy_mode mode) -{ - static DEFINE_PER_CPU(enum paravirt_lazy_mode, lazy_mode); - - if (!vmi_ops.set_lazy_mode) - return; - - /* Modes should never nest or overlap */ - BUG_ON(__get_cpu_var(lazy_mode) && !(mode == PARAVIRT_LAZY_NONE || - mode == PARAVIRT_LAZY_FLUSH)); - - if (mode == PARAVIRT_LAZY_FLUSH) { - vmi_ops.set_lazy_mode(0); - vmi_ops.set_lazy_mode(__get_cpu_var(lazy_mode)); - } else { - vmi_ops.set_lazy_mode(mode); - __get_cpu_var(lazy_mode) = mode; - }...

...c @@ -552,24 +552,22 @@ vmi_startup_ipi_hook(int phys_apicid, un } #endif -static void vmi_set_lazy_mode(enum paravirt_lazy_mode mode) -{ - static DEFINE_PER_CPU(enum paravirt_lazy_mode, lazy_mode); - - if (!vmi_ops.set_lazy_mode) - return; - - /* Modes should never nest or overlap */ - BUG_ON(__get_cpu_var(lazy_mode) && !(mode == PARAVIRT_LAZY_NONE || - mode == PARAVIRT_LAZY_FLUSH)); - - if (mode == PARAVIRT_LAZY_FLUSH) { - vmi_ops.set_lazy_mode(0); - vmi_ops.set_lazy_mode(__get_cpu_var(lazy_mode)); - } else { - vmi_ops.set_lazy_mode(mode); - __get_cpu_var(lazy_mode) = mode; - }...