cause rcu hard-code the value to be 0. I will send another patch for
this.)
This patch below tries to replace the rcu_irq_enter/exit() with
rcu_idle_exit/enter(), if it is in rcu idle, and it is idle process;
otherwise, rcu_user_exit() is called to exit user eqs if necessary.
Signed-off-by: Li
This patch uses the real new value of dynticks_nesting instead of 0 in
rcu_eqs_enter_common().
Signed-off-by: Li Zhong
---
kernel/rcutree.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 7733eb5..6b7e314 100644
--- a/kernel
4949aa665 seems related to schedule(), which is not in the code
path if we are in cpu idle eqs )
I think we still need Gleb's patch about the idle check in
kvm_async_pf_task_wait(), and maybe another patch for the
exit_idle()/enter_idle() issue.
Signed-off-by: Li Zhong
---
arch/x86/kerne
On Tue, 2012-11-27 at 19:22 -0800, Christian Kujau wrote:
> On Tue, 27 Nov 2012 at 19:06, Christian Kujau wrote:
> > the same thing[0] happened again in 3.7-rc7, after ~20h uptime:
>
> I found the following on patchwork, but this seems to deal with powerpc64
> only, while this PowerBook G4 of min
On Wed, 2012-11-28 at 13:55 +0100, Frederic Weisbecker wrote:
> 2012/11/28 Li Zhong :
> > Thank you all for the review and education.
> >
> > Below are my current understandings and an update version. Would you
> > please help to review it again and give your comm
On Tue, 2012-11-27 at 19:33 +0100, Frederic Weisbecker wrote:
[]
> -
> - WARN_ON_ONCE(!current->mm);
> -
> - local_irq_save(flags);
> - rdtp = &__get_cpu_var(rcu_dynticks);
> - if (!rdtp->ignore_user_qs && !rdtp->in_user) {
> - rdtp->in_user = true;
> - r
As new context tracking subsystem added, it seems ignore_user_qs and
in_user defined in struct rcu_dynticks are no longer needed, so remove
them.
Signed-off-by: Li Zhong
---
kernel/rcutree.c | 3 ---
kernel/rcutree.h | 4
2 files changed, 7 deletions(-)
diff --git a/kernel/rcutree.c b
On Thu, 2012-11-29 at 19:25 +0200, Gleb Natapov wrote:
> On Thu, Nov 29, 2012 at 03:40:05PM +0100, Frederic Weisbecker wrote:
> > 2012/11/29 Li Zhong :
> > > On Wed, 2012-11-28 at 13:55 +0100, Frederic Weisbecker wrote:
> > >> > With rcu_user_exit() at the be
a matching rcu_irq_enter() before it,
which is illegal if the cpu happens to be in rcu idle state.
Signed-off-by: Li Zhong
---
arch/x86/kernel/kvm.c | 12 ++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 4180a87..342b
On Wed, 2013-02-06 at 18:44 -0500, Sasha Levin wrote:
> On 02/04/2013 02:17 AM, Michel Lespinasse wrote:
> > munlock_vma_pages_range() was always incrementing addresses by PAGE_SIZE
> > at a time. When munlocking THP pages (or the huge zero page), this resulted
> > in taking the mm->page_table_lock
On Thu, 2013-02-07 at 01:29 +0100, Frederic Weisbecker wrote:
> 2013/2/1 Li Zhong :
> > This is the syscall slow path hooks for context tracking subsystem,
> > corresponding to
> > [PATCH] x86: Syscall hooks for userspace RCU extended QS
> > commit bf5a3c13b9398
.
Signed-off-by: Li Zhong
---
kernel/cpuset.c | 13 ++---
1 files changed, 2 insertions(+), 11 deletions(-)
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 4f9dfe4..515a713 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -,17 +,8 @@ static void cpuset_hotplug_workfn
These patches try to support context tracking for Power arch, beginning with
64-bit pSeries. The codes are ported from that of the x86_64, and in each
patch, I listed the corresponding patch for x86.
Would you please help review and give your comments?
Thanks, Zhong
Li Zhong (5):
powerpc
This patch allows RCU usage in do_notify_resume, e.g. signal handling.
It corresponds to
[PATCH] x86: Exit RCU extended QS on notify resume
commit edf55fda35c7dc7f2d9241c3abaddaf759b457c6
Signed-off-by: Li Zhong
---
arch/powerpc/kernel/signal.c |5 +
1 file changed, 5 insertions
Start context tracking support from pSeries.
Signed-off-by: Li Zhong
---
arch/powerpc/platforms/pseries/Kconfig |1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/platforms/pseries/Kconfig
b/arch/powerpc/platforms/pseries/Kconfig
index 837cf49..a9570fe 100644
--- a/arch
for userspace RCU extended QS
commit 6ba3c97a38803883c2eee489505796cb0a727122
Signed-off-by: Li Zhong
---
arch/powerpc/include/asm/context_tracking.h | 20 +++
arch/powerpc/kernel/exceptions-64s.S|4 +-
arch/powerpc/kernel/traps.c | 79
This patch corresponds to
[PATCH] x86: Use the new schedule_user API on userspace preemption
commit 0430499ce9d78691f3985962021b16bf8f8a8048
Signed-off-by: Li Zhong
---
arch/powerpc/include/asm/context_tracking.h | 11 +++
arch/powerpc/kernel/entry_64.S |3 ++-
2
. TIF_NOHZ is added to _TIF_SYCALL_T_OR_A, so it is
better for it to be in the same 16 bits with others in the group, so in the
asm code, andi. with this group could work.
Signed-off-by: Li Zhong
---
arch/powerpc/include/asm/thread_info.h |7 +--
arch/powerpc/kernel/ptrace.c |5
, including user_exit(), and a few callers of
user_exit().
Signed-off-by: Li Zhong
--
arch/x86/kernel/ptrace.c | 4 ++--
arch/x86/kernel/signal.c | 2 +-
include/linux/rcupdate.h | 2 ++
kernel/context_tracking.c | 2 +-
kernel/sched/core.c | 2 +-
5 files changed, 7 insertions(+), 5
On Thu, 2013-02-28 at 08:38 -0800, Paul E. McKenney wrote:
> On Thu, Feb 28, 2013 at 04:26:10PM +0800, Li Zhong wrote:
> > I saw some RCU illegal usage from idle complaints when function tracer
> > is enabled with forced context tracking.
> >
> > It seems that __sc
ons, which are illegal in extended
quiescent states. This patch therefore moves the call to rcu_sched_qs()
so that it precedes the point at which we set the new value of
rcu_dynticks_nesting, which may indicate RCU is in an extended quiescent
state.
Signed-off-by: Li Zhong
Signed-off-by: Paul E
is a delta of my previous patch
[https://lkml.org/lkml/2012/4/11/814] and commit 919f797
Signed-off-by: Li Zhong
---
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 2936b44..b9dd7f0 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -832,7 +832,7 @@ void scsi_finish_co
On Mon, 2012-09-24 at 09:44 +0400, James Bottomley wrote:
> On Mon, 2012-09-24 at 13:30 +0800, Li Zhong wrote:
> > Just noticed that after commit 919f797, it is possible that
> > scsi_cmd_to_driver() returns NULL. This patch adds the NULL checking for
> > drv
> &
On Mon, 2012-09-24 at 11:35 +0400, James Bottomley wrote:
> On Mon, 2012-09-24 at 15:03 +0800, Li Zhong wrote:
> > On Mon, 2012-09-24 at 09:44 +0400, James Bottomley wrote:
> > > On Mon, 2012-09-24 at 13:30 +0800, Li Zhong wrote:
> > > > Just noticed that after commi
file system
(with backing device) to try other things that's not implemented this time.
Thanks, Zhong
Li Zhong (2):
vfs: partial revoke implementation suggested by Al Viro
proc: covert procfs to use the general revoke implementation
fs/Makefile|2 +-
fs/compat_ioctl.
This patch tries to partially implement what Al Viro suggested in
https://lkml.org/lkml/2013/4/5/15
Code also mostly copied from the above link
Signed-off-by: Li Zhong
---
fs/Makefile|2 +-
fs/revoke.c| 133
include
y. remove_proc_entry()/remove_proc_subtree() would call revoke_it()
on everything we are removing.
Signed-off-by: Li Zhong
---
fs/compat_ioctl.c |8 +-
fs/eventpoll.c | 10 ++-
fs/file_table.c| 13 ++-
fs/ioctl.c |7 +-
fs/proc/generic.c | 12 +--
fs/p
On Fri, 2012-11-30 at 12:26 +0200, Gleb Natapov wrote:
> On Fri, Nov 30, 2012 at 05:18:41PM +0800, Li Zhong wrote:
> > This patch adds user eqs exception hooks for async page fault page not
> > present code path, to exit the user eqs and re-enter it as necessary.
> >
&g
On Sat, 2012-12-01 at 12:32 -0800, Christian Kujau wrote:
> On Wed, 28 Nov 2012 at 16:41, Li Zhong wrote:
> > On Tue, 2012-11-27 at 19:22 -0800, Christian Kujau wrote:
> > > On Tue, 27 Nov 2012 at 19:06, Christian Kujau wrote:
> > > > the same thing[0] happened again
a matching rcu_irq_enter() before it,
which is illegal if the cpu happens to be in rcu idle state.
Signed-off-by: Li Zhong
---
arch/x86/kernel/kvm.c | 12 ++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 08b973f..e99af60 100
n't be conflicts, but we need change
the including file name after that. I don't know how to handle this kind
of thing...
Thanks, Zhong
>
> On Fri, Nov 30, 2012 at 05:18:41PM +0800, Li Zhong wrote:
> > This patch adds user eqs exception hooks for async page fault page not
> &
On Tue, 2012-12-04 at 07:11 +0200, Gleb Natapov wrote:
> On Tue, Dec 04, 2012 at 10:36:02AM +0800, Li Zhong wrote:
> > On Mon, 2012-12-03 at 11:57 +0200, Gleb Natapov wrote:
> > > Please regenerate the patch against
> > > git://git.kernel.org/pub/scm/virt/kvm/k
.}, at: []
> console_callback+0x20/0x194
> [ 97.803112]
> [ 97.803112] which lock already depends on the new lock.
>
> ...and on it goes. Please see the URL above for the whole dmesg and
> .config.
>
> @Li Zhong: I have applied your fix for the "MAX_STACK_TRACE_EN
On Thu, 2012-12-20 at 19:32 +0100, Frederic Weisbecker wrote:
> If we want to stop the tick further idle, we need to be
> able to account the cputime without using the tick.
>
> Virtual based cputime accounting solves that problem by
> hooking into kernel/user boundaries.
>
> However implementing
On Sat, 2012-12-29 at 17:42 +0100, Frederic Weisbecker wrote:
> While remotely reading the cputime of a task running in a
> full dynticks CPU, the values stored in utime/stime fields
> of struct task_struct may be stale. Its values may be those
> of the last kernel <-> user transition time snapshot
On Sat, 2012-12-29 at 17:42 +0100, Frederic Weisbecker wrote:
> Start with a very simple interface to define full dynticks CPU:
> use a boot time option defined cpumask through the "full_nohz="
> kernel parameter.
>
> Make sure you keep at least one CPU outside this range to handle
> the timekeepi
On Sat, 2013-01-05 at 12:26 +0800, Hui Zhu wrote:
> The comments of these WARN_ON_ONCE said "Can deadlock when called with
> interrupts disabled".
> But I didn't find anything that will block this function.
It seems that if two cpus try to IPI each other with wait equals true,
they will deadlock i
cpu is not used after commit 5b8621a68fdcd2baf1d3b413726f913a5254d46a
Signed-off-by: Li Zhong
---
kernel/time/tick-sched.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index e80183f..8145860 100644
--- a/kernel/time/tick-sched.c
+++ b
9b da 01 00 e9 4f ff ff
ff 66 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb 48 83 ec 08 48 85 ff 74 1d 87
00 01 00 00 01 74 1e 48 8d 7b 38 83 6b 38 01 0f 94 c0 84
[ 1845.185026] RIP [] kobject_put+0x11/0x60
[ 1845.185026] RSP
[ 1845.185026] CR2: a01601d0
[ 1845.185026] ---[ end trace
On Wed, 2013-08-21 at 09:18 -0700, Greg KH wrote:
> On Wed, Aug 21, 2013 at 05:49:58PM +0800, Li Zhong wrote:
> > DEBUG_KOBJECT_RELEASE helps to find the issue attached below.
> >
> > After some investigation, it seems the reason is:
> > The mod->mkobj.kobj(ff
On Wed, 2013-08-21 at 21:03 -0700, Greg KH wrote:
> On Thu, Aug 22, 2013 at 10:34:06AM +0800, Li Zhong wrote:
> > On Wed, 2013-08-21 at 09:18 -0700, Greg KH wrote:
> > > On Wed, Aug 21, 2013 at 05:49:58PM +0800, Li Zhong wrote:
> > > > DEBUG_KOBJECT_RELEASE helps to
74 1e 48 8d 7b 38 83 6b 38 01 0f 94 c0 84
[ 1845.185026] RIP [] kobject_put+0x11/0x60
[ 1845.185026] RSP
[ 1845.185026] CR2: a01601d0
[ 1845.185026] ---[ end trace 49a70afd109f5653 ]---
Signed-off-by: Li Zhong
---
drivers/base/core.c| 2 +-
drivers/base/module.c | 4 ++--
On Thu, 2013-08-22 at 16:30 +0930, Rusty Russell wrote:
> Greg KH writes:
> > On Wed, Aug 21, 2013 at 05:49:58PM +0800, Li Zhong wrote:
> > > struct kobj_type module_ktype = {
> > > + .release =module_kobj_release,
> > > .sysfs_ops =&module_sys
attribute to a couple of functions where
the above could happen, including user_exit(), and a few callers of
user_exit().
Signed-off-by: Li Zhong
--
arch/x86/kernel/ptrace.c | 4 ++--
arch/x86/kernel/signal.c | 2 +-
kernel/context_tracking.c | 2 +-
kernel/sched/core.c | 2 +-
4 files
exception are pulled into 3.10, so there is no dependency on
tip tree. So patch #2 and #6 in previous version_2 is merged together.
Li Zhong (5):
powerpc: Syscall hooks for context tracking subsystem
powerpc: Exception hooks for context tracking subsystem
powerpc: Exit user context on
6c1e0256fad84a843d915414e4b5973b7443d48d
context_tracking: Restore correct previous context state on exception exit
it is able for exception hooks to use the generic code above instead of a
redundant arch implementation.
Signed-off-by: Li Zhong
---
arch/powerpc/kernel/traps.c | 91
This patch corresponds to
[PATCH] x86: Use the new schedule_user API on userspace preemption
commit 0430499ce9d78691f3985962021b16bf8f8a8048
Signed-off-by: Li Zhong
---
arch/powerpc/include/asm/context_tracking.h | 10 ++
arch/powerpc/kernel/entry_64.S |3 ++-
2
Start context tracking support from pSeries.
Signed-off-by: Li Zhong
---
arch/powerpc/platforms/pseries/Kconfig |1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/platforms/pseries/Kconfig
b/arch/powerpc/platforms/pseries/Kconfig
index 9a0941b..023b288 100644
--- a/arch
This patch allows RCU usage in do_notify_resume, e.g. signal handling.
It corresponds to
[PATCH] x86: Exit RCU extended QS on notify resume
commit edf55fda35c7dc7f2d9241c3abaddaf759b457c6
Signed-off-by: Li Zhong
---
arch/powerpc/kernel/signal.c |5 +
1 file changed, 5 insertions
. TIF_NOHZ is added to _TIF_SYCALL_T_OR_A, so it is
better for it to be in the same 16 bits with others in the group, so in the
asm code, andi. with this group could work.
Signed-off-by: Li Zhong
Acked-by: Frederic Weisbecker
---
arch/powerpc/include/asm/thread_info.h |7 +--
arch/powerpc
On Mon, 2013-05-13 at 15:51 +1000, Benjamin Herrenschmidt wrote:
> On Mon, 2013-05-13 at 13:21 +0800, Li Zhong wrote:
> > These patches try to support context tracking for Power arch, beginning with
> > 64-bit pSeries. The codes are ported from that of the x86_64, and in each
>
On Mon, 2013-05-13 at 15:57 +1000, Benjamin Herrenschmidt wrote:
> On Mon, 2013-05-13 at 13:21 +0800, Li Zhong wrote:
> > int recover = 0;
> > + enum ctx_state prev_state;
> > +
> > + prev_state = exception_enter();
>
> Please make it nicer:
>
On Mon, 2013-05-13 at 18:59 +1000, Benjamin Herrenschmidt wrote:
> On Mon, 2013-05-13 at 16:03 +0800, Li Zhong wrote:
> >
> > To my understanding, it is used to enable RCU user extended quiescent
> > state, so RCU on that cpu doesn't need scheduler ticks. And togethe
On Mon, 2013-05-13 at 19:06 +1000, Benjamin Herrenschmidt wrote:
> On Mon, 2013-05-13 at 16:44 +0800, Li Zhong wrote:
> > Yes, the above and hash_page() are two C functions for a same exception.
> > And the exception hooks enable RCU usage in those C codes. But for asm
> > co
On Fri, 2013-05-10 at 17:12 -0400, Steven Rostedt wrote:
> plain text document attachment (fix-user-exit-preempt.patch)
> I started testing the new NOHZ_FULL in the kernel and had some issues,
> so I started function tracing and this bug report came out:
>
>
> [23446.458073] [ cut her
This patch allows RCU usage in do_notify_resume, e.g. signal handling.
It corresponds to
[PATCH] x86: Exit RCU extended QS on notify resume
commit edf55fda35c7dc7f2d9241c3abaddaf759b457c6
Signed-off-by: Li Zhong
---
arch/powerpc/kernel/signal.c |5 +
1 file changed, 5 insertions
6c1e0256fad84a843d915414e4b5973b7443d48d
context_tracking: Restore correct previous context state on exception exit
it is able for exception hooks to use the generic code above instead of a
redundant arch implementation.
Signed-off-by: Li Zhong
---
arch/powerpc/kernel/traps.c | 80
This patch corresponds to
[PATCH] x86: Use the new schedule_user API on userspace preemption
commit 0430499ce9d78691f3985962021b16bf8f8a8048
Signed-off-by: Li Zhong
---
arch/powerpc/include/asm/context_tracking.h | 10 ++
arch/powerpc/kernel/entry_64.S |3 ++-
2
Start context tracking support from pSeries.
Signed-off-by: Li Zhong
---
arch/powerpc/platforms/pseries/Kconfig |1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/platforms/pseries/Kconfig
b/arch/powerpc/platforms/pseries/Kconfig
index 9a0941b..023b288 100644
--- a/arch
These patches try to support context tracking for Power arch, beginning with
64-bit pSeries. The codes are ported from that of the x86_64, and in each
patch, I listed the corresponding patch for x86.
v4:
fixed some cosmetic issues suggested by Ben.
Li Zhong (5):
powerpc: Syscall hooks for
. TIF_NOHZ is added to _TIF_SYCALL_T_OR_A, so it is
better for it to be in the same 16 bits with others in the group, so in the
asm code, andi. with this group could work.
Signed-off-by: Li Zhong
Acked-by: Frederic Weisbecker
---
arch/powerpc/include/asm/thread_info.h |7 +--
arch/powerpc
On Mon, 2013-05-13 at 11:03 -0400, Steven Rostedt wrote:
> On Mon, 2013-05-13 at 17:56 +0800, Li Zhong wrote:
>
> > > All this before schedule_user() was able to call user_exit() and take us
> > > out of dynamic tick user context.
> >
> > Maybe we c
On Tue, 2013-05-14 at 16:13 +0200, Frederic Weisbecker wrote:
> On Fri, May 10, 2013 at 05:12:26PM -0400, Steven Rostedt wrote:
> > +/*
> > + * This is a entry point to the scheduler() just before going
> > + * back to user space. This is called with irqs disabled
> > + * which prevents races with
On Fri, 2013-04-05 at 13:50 +1100, Paul Mackerras wrote:
> On Fri, Mar 29, 2013 at 06:00:17PM +0800, Li Zhong wrote:
> > This is the exception hooks for context tracking subsystem, including
> > data access, program check, single step, instruction breakpoint, machine
> > che
On Wed, 2013-04-03 at 17:32 +0800, Li Zefan wrote:
> On 2013/4/2 15:16, Li Zhong wrote:
> > In cpuset_hotplug_workfn(), partition_sched_domains() is called without
> > hotplug lock held, which is actually needed (stated in the function
> > header of partition_sched_domains()).
Hi Zefan,
I did some test today, enabling cpuset and online/offline the cpus. It
caused NULL address dereferencing in get_group(). After adding some
debugging code, it seems that it is caused by using some offlined cpus
as the parameter to partition_sched_domains(). More details below:
=
On Wed, 2013-04-10 at 14:56 +1000, Michael Ellerman wrote:
> On Fri, Mar 29, 2013 at 06:00:21PM +0800, Li Zhong wrote:
> > After the exception handling moved to generic code, and some changes in
> ...
> > diff --git a/arch/powerpc/mm/hash_utils_64.c
> > b/arch/powerpc/mm/h
On Wed, 2013-04-10 at 13:32 +0800, Li Zhong wrote:
> On Wed, 2013-04-10 at 14:56 +1000, Michael Ellerman wrote:
> > On Fri, Mar 29, 2013 at 06:00:21PM +0800, Li Zhong wrote:
> > > After the exception handling moved to generic code, and some changes in
> > ...
> >
igned-off-by: Li Zhong
---
kernel/time/tick-sched.c |2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index da53c8f..0aa575b 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -251,7 +251,7 @@
On Sat, 2013-04-27 at 15:40 +0200, Frederic Weisbecker wrote:
> 2013/4/27 Li Zhong :
> > I saw following error when testing the latest nohz code on Power:
> >
> > [ 85.295384] BUG: using smp_processor_id() in preemptible []
> > code: rsyslogd/3493
&
On Sun, 2013-04-28 at 09:46 +0800, Li Zefan wrote:
> Reported by Fengguang's kbuild test robot:
Thank you for the quick fix, Zefan.
Strong robot :)
Thanks, Zhong
>
> kernel/cpuset.c:787: warning: 'generate_sched_domains' defined but not used
>
> Introduced by commit e0e80a02e5701c8790bd348ab
avoid the above complaint.
Signed-off-by: Li Zhong
---
kernel/time/tick-sched.c |7 ---
1 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index da53c8f..1c9f53b 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick
On Thu, 2013-04-11 at 16:57 +0800, Li Zefan wrote:
> On 2013/4/9 17:59, Li Zhong wrote:
> > Hi Zefan,
> >
> > I did some test today, enabling cpuset and online/offline the cpus. It
> > caused NULL address dereferencing in get_group(). After adding some
> > de
(), then the cpu
would be taken down with part of the DOWN_PREPARE notifier callbacks
called, and something bad could happen after that.
Signed-off-by: Li Zhong
---
kernel/time/tick-sched.c |2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/kernel/time/tick-sched.c b/kernel/time
for userspace RCU extended QS
commit 6ba3c97a38803883c2eee489505796cb0a727122
Signed-off-by: Li Zhong
---
arch/powerpc/include/asm/context_tracking.h | 28 +
arch/powerpc/kernel/exceptions-64s.S|4 +-
arch/powerpc/kernel/traps.c | 83
. TIF_NOHZ is added to _TIF_SYCALL_T_OR_A, so it is
better for it to be in the same 16 bits with others in the group, so in the
asm code, andi. with this group could work.
Signed-off-by: Li Zhong
Acked-by: Frederic Weisbecker
---
arch/powerpc/include/asm/thread_info.h |7 +--
arch/powerpc
This patch allows RCU usage in do_notify_resume, e.g. signal handling.
It corresponds to
[PATCH] x86: Exit RCU extended QS on notify resume
commit edf55fda35c7dc7f2d9241c3abaddaf759b457c6
Signed-off-by: Li Zhong
---
arch/powerpc/kernel/signal.c |5 +
1 file changed, 5 insertions
exception exit
it is able for this patch to replace the implementation in arch code
with the generic code in above commits.
Signed-off-by: Li Zhong
---
arch/powerpc/include/asm/context_tracking.h | 29 ---
arch/powerpc/kernel/exceptions-64s.S|4 +--
arch/powerpc/kernel
Start context tracking support from pSeries.
Signed-off-by: Li Zhong
---
arch/powerpc/platforms/pseries/Kconfig |1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/platforms/pseries/Kconfig
b/arch/powerpc/platforms/pseries/Kconfig
index 9a0941b..023b288 100644
--- a/arch
This patch corresponds to
[PATCH] x86: Use the new schedule_user API on userspace preemption
commit 0430499ce9d78691f3985962021b16bf8f8a8048
Signed-off-by: Li Zhong
---
arch/powerpc/include/asm/context_tracking.h | 11 +++
arch/powerpc/kernel/entry_64.S |3 ++-
2
rch/common code merging. And it
might also make future changes easier.
Thanks, Zhong
Li Zhong (6):
powerpc: Syscall hooks for context tracking subsystem
powerpc: Exception hooks for context tracking subsystem
powerpc: Exit user context on notify resume
powerpc: Use the new schedule_u
On Mon, 2012-07-09 at 09:01 -0500, Christoph Lameter wrote:
> > I was pointed by Glauber to the slab common code patches. I need some
> > more time to read the patches. Now I think the slab/slot changes in this
> > v3 are not needed, and can be ignored.
>
> That may take some kernel cycles. You ha
On Wed, 2012-07-11 at 15:42 -0700, Andrew Morton wrote:
> On Mon, 09 Jul 2012 15:04:25 +0800
> Li Zhong wrote:
>
> > This patch tries to fix a dead loop in async_synchronize_full(), which
> > could be seen when preemption is disabled on a single cpu ma
On Wed, 2012-07-11 at 15:50 -0700, Dan Williams wrote:
> On Wed, Jul 11, 2012 at 3:42 PM, Andrew Morton
> wrote:
> > The patch is fairly wordwrapped - please fix up your email client.
> >
> > More seriously, it does not apply to linux-next due to some fairly
> > significant changes which have been
On Sun, 2013-02-10 at 15:10 +0100, Frederic Weisbecker wrote:
> 2013/2/1 Li Zhong :
> > This is the exception hooks for context tracking subsystem, including
> > data access, program check, single step, instruction breakpoint, machine
> > check,
> > alignment, fp
On Sat, 2013-01-12 at 12:43 -0800, Christian Kujau wrote:
> On Wed, 28 Nov 2012 at 16:41, Li Zhong wrote:
> > On Tue, 2012-11-27 at 19:22 -0800, Christian Kujau wrote:
> > > On Tue, 27 Nov 2012 at 19:06, Christian Kujau wrote:
> > > > the same thing[0] happened again
PE_FS type only.
Signed-off-by: Li Zhong
---
drivers/scsi/scsi_error.c |8 +---
include/scsi/scsi_cmnd.h | 12 ++--
2 files changed, 7 insertions(+), 13 deletions(-)
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index de2337f..4001559 100644
--- a/dr
On Thu, 2012-09-27 at 13:43 -0400, Martin K. Petersen wrote:
> >>>>> "Li" == Li Zhong writes:
>
> > @@ -845,8 +844,11 @@ static int scsi_send_eh_cmnd(struct scsi_cmnd *scmd,
> > unsigned char *cmnd,
> >
> > scsi_eh_restore_cmn
fixes a bug where you get different behaviors
from REQ_TYPE_BLOCK_PC commands when a driver is and isn't attached.
v2: mirror code != REQ_TYPE_BLOCK_PC in scsi.c, rather than == REQ_TYPE_FS
Signed-off-by: Li Zhong
---
drivers/scsi/scsi_error.c |8 +---
include/scsi/scsi_cmnd
On Thu, 2012-07-05 at 20:51 -0700, Christian Kujau wrote:
> On Mon, 2 Jul 2012 at 14:04, Li Zhong wrote:
> > This patch tries to fix a dead loop in async_synchronize_full(), which
> > could be seen when preemption is disabled on a single cpu machine.
>
> This helps in
On Fri, 2012-07-06 at 17:12 +0800, Cong Wang wrote:
> On Mon, Jul 2, 2012 at 2:04 PM, Li Zhong wrote:
> > void async_synchronize_full(void)
> > {
> > - do {
> > - async_synchronize_cookie(next_cookie);
> > - } while (!list_empty(&a
On Fri, 2012-07-06 at 14:13 +0400, Glauber Costa wrote:
> On 07/05/2012 01:29 PM, Li Zhong wrote:
> > On Thu, 2012-07-05 at 12:23 +0400, Glauber Costa wrote:
> >> On 07/05/2012 05:41 AM, Li Zhong wrote:
> >>> On Wed, 2012-07-04 at 16:40 +0400, Glauber Costa wrote:
>
On Fri, 2012-07-06 at 08:56 -0500, Christoph Lameter wrote:
> I thought I posted this a couple of days ago. Would this not fix things
> without having to change all the allocators?
I was pointed by Glauber to the slab common code patches. I need some
more time to read the patches. Now I think the
Currently, async_synchronize_cookie_domain() expects a non-NULL running
list ( if NULL, there would be NULL pointer dereference ), so maybe a
NULL pointer could be used as an indication for the functions to
synchronize all works in all domains.
Reported-by: Paul E. McKenney
Signed-off-by: Li Zhong
Tested-by: Paul
evand
> Cc: Gilad Ben Yossef
> Cc: Hakan Akkan
> Cc: Ingo Molnar
> Cc: Li Zhong
> Cc: Namhyung Kim
> Cc: Paul E. McKenney
> Cc: Paul Gortmaker
> Cc: Peter Zijlstra
> Cc: Steven Rostedt
> Cc: Thomas Gleixner
> [ Forward port conflicts ]
> Signed-off-
ted-by: Paul E. McKenney
Signed-off-by: Li Zhong
Tested-by: Paul E. McKenney
Tested-by: Christian Kujau
---
kernel/async.c | 13 +
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/kernel/async.c b/kernel/async.c
index bd0c168..32d8dc9 100644
--- a/kernel/async.c
On Tue, 2014-02-11 at 10:27 -0500, Tejun Heo wrote:
> On Tue, Feb 11, 2014 at 12:00:36PM +0100, Peter Zijlstra wrote:
> > > Looks good to me. Can you please post the patch with SOB?
> >
> > ---
> > Subject: workqueue: Fix workqueue lockdep name
> >
> > Tommi noticed a 'funny' lock class name: "%
example looks like:
# cat phys_index end_phys_index
0320
0327
Signed-off-by: Li Zhong
---
drivers/base/memory.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index bece691..b10f2fa 100644
--- a/drivers/base/memory.c
On Wed, 2014-04-02 at 09:09 -0700, Dave Hansen wrote:
> On 04/02/2014 01:56 AM, Li Zhong wrote:
> > I noticed the phys_index and end_phys_index under
> > /sys/devices/system/memory/memoryXXX/ have the same value, e.g.
> > (for the test machine, one memory block ha
On Thu, 2014-04-03 at 09:37 +0800, Zhang Yanfei wrote:
> Add ccing
>
> On 04/02/2014 04:56 PM, Li Zhong wrote:
> > I noticed the phys_index and end_phys_index under
> > /sys/devices/system/memory/memoryXXX/ have the same value, e.g.
> > (for the test machine, one
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