Displaying 20 results from an estimated 36 matches for "local_softirq_pending".
2012 May 16
1
[PATCH] virtio_net: invoke softirqs after __napi_schedule
__napi_schedule might raise softirq but nothing
causes do_softirq to trigger, so it does not in fact
run. As a result,
the error message "NOHZ: local_softirq_pending 08"
sometimes occurs during boot of a KVM guest when the network service is
started and we are oom:
...
Bringing up loopback interface: [ OK ]
Bringing up interface eth0:
Determining IP information for eth0...NOHZ: local_softirq_pending 08
done.
[ OK ]
...
Further, receiv...
2012 May 16
1
[PATCH] virtio_net: invoke softirqs after __napi_schedule
__napi_schedule might raise softirq but nothing
causes do_softirq to trigger, so it does not in fact
run. As a result,
the error message "NOHZ: local_softirq_pending 08"
sometimes occurs during boot of a KVM guest when the network service is
started and we are oom:
...
Bringing up loopback interface: [ OK ]
Bringing up interface eth0:
Determining IP information for eth0...NOHZ: local_softirq_pending 08
done.
[ OK ]
...
Further, receiv...
2010 Mar 02
3
2.6.33 high cpu usage
With the ATI bug I was hitting earlier fixed, only my btrfs partition
continues to show high cpu usage for some operations.
Rsync, git pull, git checkout and svn up are typicall operations which
trigger the high cpu usage.
As an example, this perf report is from using git checkout to change to
a new branch; the change needed to checkout 208 files out of about 1600
total files. du(1) reports
2018 Jan 23
2
Xen 4.6.6-9 (with XPTI meltdown mitigation) packages making their way to centos-virt-xen-testing
On Mon, Jan 22, 2018 at 10:38 PM, Nathan March <nathan at gt.net> wrote:
> Just a heads up that I'm seeing major stability problems on these builds.
> Didn't have console capture setup unfortunately, but have seen my test
> hypervisor hard lock twice over the weekend.
>
> This is with xpti being used, rather than the shim.
Thanks for the heads-up. It's been
2007 Apr 18
0
[PATCH 1/9] Vmi timer fixes round two.patch
...oid)
unsigned long seq, next;
unsigned long long real_cycles_expiry;
int cpu = smp_processor_id();
- int idle;
BUG_ON(!irqs_disabled());
if (sysctl_hz_timer != 0)
@@ -388,13 +384,13 @@ int vmi_stop_hz_timer(void)
cpu_set(cpu, nohz_cpu_mask);
smp_mb();
+
if (rcu_needs_cpu(cpu) || local_softirq_pending() ||
- (next = next_timer_interrupt(), time_before_eq(next, jiffies))) {
+ (next = next_timer_interrupt(),
+ time_before_eq(next, jiffies + HZ/CONFIG_VMI_ALARM_HZ))) {
cpu_clear(cpu, nohz_cpu_mask);
- next = jiffies;
- idle = 0;
- } else
- idle = 1;
+ return 0;
+ }
/* Conve...
2007 Apr 18
0
[PATCH 1/9] Vmi timer fixes round two.patch
...oid)
unsigned long seq, next;
unsigned long long real_cycles_expiry;
int cpu = smp_processor_id();
- int idle;
BUG_ON(!irqs_disabled());
if (sysctl_hz_timer != 0)
@@ -388,13 +384,13 @@ int vmi_stop_hz_timer(void)
cpu_set(cpu, nohz_cpu_mask);
smp_mb();
+
if (rcu_needs_cpu(cpu) || local_softirq_pending() ||
- (next = next_timer_interrupt(), time_before_eq(next, jiffies))) {
+ (next = next_timer_interrupt(),
+ time_before_eq(next, jiffies + HZ/CONFIG_VMI_ALARM_HZ))) {
cpu_clear(cpu, nohz_cpu_mask);
- next = jiffies;
- idle = 0;
- } else
- idle = 1;
+ return 0;
+ }
/* Conve...
2018 Jan 23
0
Xen 4.6.6-9 (with XPTI meltdown mitigation) packages making their way to centos-virt-xen-testing
...s like I can reproduce this pretty easily, this happened upon ssh'ing
into the server while I had a VM migrating into it. The system goes
completely unresponsive (can't even enter a keystroke via console):
[64722.291300] vlan208: port 4(vif5.0) entered forwarding state
[64722.291695] NOHZ: local_softirq_pending 08
[64929.006981] BUG: unable to handle kernel paging request at
0000000000002260
[64929.007020] IP: [<ffffffff81533a24>] n_tty_receive_buf_common+0xa4/0x1f0
[64929.007049] PGD 1f7a53067 [64929.007057] PUD 1ee0d4067
PMD 0 [64929.007069]
[64929.007077] Oops: 0000 [#1] SMP
[64929.007088] Modu...
2018 Jan 23
2
Xen 4.6.6-9 (with XPTI meltdown mitigation) packages making their way to centos-virt-xen-testing
...is pretty easily, this happened upon ssh'ing
> into the server while I had a VM migrating into it. The system goes
> completely unresponsive (can't even enter a keystroke via console):
>
> [64722.291300] vlan208: port 4(vif5.0) entered forwarding state
> [64722.291695] NOHZ: local_softirq_pending 08
> [64929.006981] BUG: unable to handle kernel paging request at
> 0000000000002260
> [64929.007020] IP: [<ffffffff81533a24>] n_tty_receive_buf_common+0xa4/0x1f0
> [64929.007049] PGD 1f7a53067 [64929.007057] PUD 1ee0d4067
> PMD 0 [64929.007069]
> [64929.007077] Oops: 000...
2007 Apr 18
1
[RFC, PATCH 24/24] i386 Vmi no idle hz
...xt;
+ unsigned long long real_cycles_expiry;
+ int cpu = smp_processor_id();
+
+ /* Allow disabling via /proc/sys/kernel/hz_timer. */
+ if (sysctl_hz_timer != 0)
+ return;
+
+ /* Set nohz_cpu_mask, check rcu_pending in same order as S390. */
+ cpu_set(cpu, nohz_cpu_mask);
+ if (rcu_pending(cpu) || local_softirq_pending()) {
+ cpu_clear(cpu, nohz_cpu_mask);
+ return;
+ }
+
+ next = next_timer_interrupt();
+
+ if (jiffies + VMI_MIN_NO_IDLE_HZ_SKIPPED_TICKS >= next) {
+ cpu_clear(cpu, nohz_cpu_mask);
+ return;
+ }
+
+ /* This cpu is going really idle. Disable the periodic alarm. */
+ vmi_cancel_alarm(VMI_CYCL...
2007 Apr 18
1
[RFC, PATCH 24/24] i386 Vmi no idle hz
...xt;
+ unsigned long long real_cycles_expiry;
+ int cpu = smp_processor_id();
+
+ /* Allow disabling via /proc/sys/kernel/hz_timer. */
+ if (sysctl_hz_timer != 0)
+ return;
+
+ /* Set nohz_cpu_mask, check rcu_pending in same order as S390. */
+ cpu_set(cpu, nohz_cpu_mask);
+ if (rcu_pending(cpu) || local_softirq_pending()) {
+ cpu_clear(cpu, nohz_cpu_mask);
+ return;
+ }
+
+ next = next_timer_interrupt();
+
+ if (jiffies + VMI_MIN_NO_IDLE_HZ_SKIPPED_TICKS >= next) {
+ cpu_clear(cpu, nohz_cpu_mask);
+ return;
+ }
+
+ /* This cpu is going really idle. Disable the periodic alarm. */
+ vmi_cancel_alarm(VMI_CYCL...
2007 Apr 18
0
[PATCH 6/6] VMI timer patches
...pu_clear are (SMP safe) atomic on x86. */
+
+ unsigned long seq, next;
+ unsigned long long real_cycles_expiry;
+ int cpu = smp_processor_id();
+ int idle;
+
+ BUG_ON(!irqs_disabled());
+ if (sysctl_hz_timer != 0)
+ return 0;
+
+ cpu_set(cpu, nohz_cpu_mask);
+ smp_mb();
+ if (rcu_needs_cpu(cpu) || local_softirq_pending() ||
+ (next = next_timer_interrupt(), time_before_eq(next, jiffies))) {
+ cpu_clear(cpu, nohz_cpu_mask);
+ next = jiffies;
+ idle = 0;
+ } else
+ idle = 1;
+
+ /* Convert jiffies to the real cycle counter. */
+ do {
+ seq = read_seqbegin(&xtime_lock);
+ real_cycles_expiry = real_cycl...
2007 Apr 18
0
[PATCH 6/6] VMI timer patches
...pu_clear are (SMP safe) atomic on x86. */
+
+ unsigned long seq, next;
+ unsigned long long real_cycles_expiry;
+ int cpu = smp_processor_id();
+ int idle;
+
+ BUG_ON(!irqs_disabled());
+ if (sysctl_hz_timer != 0)
+ return 0;
+
+ cpu_set(cpu, nohz_cpu_mask);
+ smp_mb();
+ if (rcu_needs_cpu(cpu) || local_softirq_pending() ||
+ (next = next_timer_interrupt(), time_before_eq(next, jiffies))) {
+ cpu_clear(cpu, nohz_cpu_mask);
+ next = jiffies;
+ idle = 0;
+ } else
+ idle = 1;
+
+ /* Convert jiffies to the real cycle counter. */
+ do {
+ seq = read_seqbegin(&xtime_lock);
+ real_cycles_expiry = real_cycl...
2007 Apr 18
0
[PATCH 5/5] Vmi timer.patch
...pu_clear are (SMP safe) atomic on x86. */
+
+ unsigned long seq, next;
+ unsigned long long real_cycles_expiry;
+ int cpu = smp_processor_id();
+ int idle;
+
+ BUG_ON(!irqs_disabled());
+ if (sysctl_hz_timer != 0)
+ return 0;
+
+ cpu_set(cpu, nohz_cpu_mask);
+ smp_mb();
+ if (rcu_needs_cpu(cpu) || local_softirq_pending() ||
+ (next = next_timer_interrupt(), time_before_eq(next, jiffies))) {
+ cpu_clear(cpu, nohz_cpu_mask);
+ next = jiffies;
+ idle = 0;
+ } else
+ idle = 1;
+
+ /* Convert jiffies to the real cycle counter. */
+ do {
+ seq = read_seqbegin(&xtime_lock);
+ real_cycles_expiry = real_cycl...
2007 Apr 18
0
[PATCH 5/5] Vmi timer.patch
...pu_clear are (SMP safe) atomic on x86. */
+
+ unsigned long seq, next;
+ unsigned long long real_cycles_expiry;
+ int cpu = smp_processor_id();
+ int idle;
+
+ BUG_ON(!irqs_disabled());
+ if (sysctl_hz_timer != 0)
+ return 0;
+
+ cpu_set(cpu, nohz_cpu_mask);
+ smp_mb();
+ if (rcu_needs_cpu(cpu) || local_softirq_pending() ||
+ (next = next_timer_interrupt(), time_before_eq(next, jiffies))) {
+ cpu_clear(cpu, nohz_cpu_mask);
+ next = jiffies;
+ idle = 0;
+ } else
+ idle = 1;
+
+ /* Convert jiffies to the real cycle counter. */
+ do {
+ seq = read_seqbegin(&xtime_lock);
+ real_cycles_expiry = real_cycl...
2007 Apr 18
1
[PATCH 9/10] Vmi timer update.patch
...cpu_set, cpu_clear are (SMP safe) atomic on x86. */
-
- unsigned long seq, next;
- unsigned long long real_cycles_expiry;
- int cpu = smp_processor_id();
-
- BUG_ON(!irqs_disabled());
- if (sysctl_hz_timer != 0)
- return 0;
-
- cpu_set(cpu, nohz_cpu_mask);
- smp_mb();
-
- if (rcu_needs_cpu(cpu) || local_softirq_pending() ||
- (next = next_timer_interrupt(),
- time_before_eq(next, jiffies + HZ/CONFIG_VMI_ALARM_HZ))) {
- cpu_clear(cpu, nohz_cpu_mask);
- return 0;
- }
-
- /* Convert jiffies to the real cycle counter. */
- do {
- seq = read_seqbegin(&xtime_lock);
- real_cycles_expiry = real_cycles_ac...
2007 Apr 18
1
[PATCH 9/10] Vmi timer update.patch
...cpu_set, cpu_clear are (SMP safe) atomic on x86. */
-
- unsigned long seq, next;
- unsigned long long real_cycles_expiry;
- int cpu = smp_processor_id();
-
- BUG_ON(!irqs_disabled());
- if (sysctl_hz_timer != 0)
- return 0;
-
- cpu_set(cpu, nohz_cpu_mask);
- smp_mb();
-
- if (rcu_needs_cpu(cpu) || local_softirq_pending() ||
- (next = next_timer_interrupt(),
- time_before_eq(next, jiffies + HZ/CONFIG_VMI_ALARM_HZ))) {
- cpu_clear(cpu, nohz_cpu_mask);
- return 0;
- }
-
- /* Convert jiffies to the real cycle counter. */
- do {
- seq = read_seqbegin(&xtime_lock);
- real_cycles_expiry = real_cycles_ac...
2007 Apr 18
31
[PATCH 00/28] Updates for firstfloor paravirt-ops patches
Hi Andi,
This is a set of updates for the firstfloor patch queue.
Quick rundown:
revert-mm-x86_64-mm-account-for-module-percpu-space-separately-from-kernel-percpu.patch
separate-module-percpu-space.patch
Update the module percpu accounting patch
fix-ff-allow-percpu-variables-to-be-page-aligned.patch
Make sure the percpu memory allocation is page-aligned
2007 Apr 18
31
[PATCH 00/28] Updates for firstfloor paravirt-ops patches
Hi Andi,
This is a set of updates for the firstfloor patch queue.
Quick rundown:
revert-mm-x86_64-mm-account-for-module-percpu-space-separately-from-kernel-percpu.patch
separate-module-percpu-space.patch
Update the module percpu accounting patch
fix-ff-allow-percpu-variables-to-be-page-aligned.patch
Make sure the percpu memory allocation is page-aligned
2007 Apr 18
34
[patch 00/34] Xen-pv_ops: Xen guest implementation for paravirt_ops interface
Hi Andi,
This patch series implements the Linux Xen guest as a paravirt_ops
backend. The features in implemented this patch series are:
* domU only
* UP and SMP guest support (NEW!)
* dynamic ticks (NEW!)
* writable pagetables, with late pinning/early unpinning
(no shadow pagetable support)
* supports both PAE and non-PAE modes
(non-PAE may be broken at the moment)
* xen hvc console
2007 Apr 18
34
[patch 00/34] Xen-pv_ops: Xen guest implementation for paravirt_ops interface
Hi Andi,
This patch series implements the Linux Xen guest as a paravirt_ops
backend. The features in implemented this patch series are:
* domU only
* UP and SMP guest support (NEW!)
* dynamic ticks (NEW!)
* writable pagetables, with late pinning/early unpinning
(no shadow pagetable support)
* supports both PAE and non-PAE modes
(non-PAE may be broken at the moment)
* xen hvc console