summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2013-04-16 19:49:26 +0200
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2013-04-16 21:11:54 +0200
commit888b65b4bc5e7fcbbb967023300cd5d44dba1950 (patch)
tree76af113bf9505a739ff1d57530318d4fd6c894ac
parentxen kconfig: fix select INPUT_XEN_KBDDEV_FRONTEND (diff)
downloadlinux-888b65b4bc5e7fcbbb967023300cd5d44dba1950.tar.xz
linux-888b65b4bc5e7fcbbb967023300cd5d44dba1950.zip
xen/smp: Fix leakage of timer interrupt line for every CPU online/offline.
In the PVHVM path when we do CPU online/offline path we would leak the timer%d IRQ line everytime we do a offline event. The online path (xen_hvm_setup_cpu_clockevents via x86_cpuinit.setup_percpu_clockev) would allocate a new interrupt line for the timer%d. But we would still use the old interrupt line leading to: kernel BUG at /home/konrad/ssd/konrad/linux/kernel/hrtimer.c:1261! invalid opcode: 0000 [#1] SMP RIP: 0010:[<ffffffff810b9e21>] [<ffffffff810b9e21>] hrtimer_interrupt+0x261/0x270 .. snip.. <IRQ> [<ffffffff810445ef>] xen_timer_interrupt+0x2f/0x1b0 [<ffffffff81104825>] ? stop_machine_cpu_stop+0xb5/0xf0 [<ffffffff8111434c>] handle_irq_event_percpu+0x7c/0x240 [<ffffffff811175b9>] handle_percpu_irq+0x49/0x70 [<ffffffff813a74a3>] __xen_evtchn_do_upcall+0x1c3/0x2f0 [<ffffffff813a760a>] xen_evtchn_do_upcall+0x2a/0x40 [<ffffffff8167c26d>] xen_hvm_callback_vector+0x6d/0x80 <EOI> [<ffffffff81666d01>] ? start_secondary+0x193/0x1a8 [<ffffffff81666cfd>] ? start_secondary+0x18f/0x1a8 There is also the oddity (timer1) in the /proc/interrupts after offlining CPU1: 64: 1121 0 xen-percpu-virq timer0 78: 0 0 xen-percpu-virq timer1 84: 0 2483 xen-percpu-virq timer2 This patch fixes it. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> CC: stable@vger.kernel.org
-rw-r--r--arch/x86/xen/smp.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 09ea61d2e02f..f80e69cc77be 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -662,6 +662,7 @@ static void xen_hvm_cpu_die(unsigned int cpu)
unbind_from_irqhandler(per_cpu(xen_debug_irq, cpu), NULL);
unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu), NULL);
unbind_from_irqhandler(per_cpu(xen_irq_work, cpu), NULL);
+ xen_teardown_timer(cpu);
native_cpu_die(cpu);
}