> On 25 Oct 2016, at 12:15, Paul Mackerras <pau...@ozlabs.org> wrote:
>
> On Tue, Oct 25, 2016 at 11:24:34AM +0800, Li Zhong wrote:
>> The core_idle_lock_held loops when the lock bit is held by others.
>> However, it is possible that after the lock bit is cleared, som
the first one is still executing in the critical section.
This patch rechecks the lock bit after lwarx, and go back to loop if it
is set.
Signed-off-by: Li Zhong <zh...@linux.vnet.ibm.com>
---
arch/powerpc/kernel/idle_book3s.S | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/
On Jun 20, 2016, at 13:25, Paul Mackerras <pau...@ozlabs.org> wrote:On Mon, May 16, 2016 at 02:58:18PM +0800, Li Zhong wrote:This patch tries to use smaller locks for each irq in the ics, insteadof a lock at the ics level, to provide better scalability.This looks like a worth-while thing
> On Jun 20, 2016, at 13:27, Paul Mackerras <pau...@ozlabs.org> wrote:
>
> On Mon, May 16, 2016 at 03:02:13PM +0800, Li Zhong wrote:
>> It seems that we don't need to take the lock before evaluating irq's
>> resend flag. What needed is to make sure when we clear th
(),
and an newly added wmb when setting irq's resend flag, and icp's resend_map.
Signed-off-by: Li Zhong <zh...@linux.vnet.ibm.com>
---
arch/powerpc/kvm/book3s_hv_rm_xics.c | 14 +++---
arch/powerpc/kvm/book3s_xics.c | 22 +++---
2 files changed, 14 insertions(
This patch tries to use smaller locks for each irq in the ics, instead
of a lock at the ics level, to provide better scalability.
Signed-off-by: Li Zhong <zh...@linux.vnet.ibm.com>
---
arch/powerpc/kvm/book3s_hv_rm_xics.c | 24 ++---
arch/powerpc/kvm/book3s_xics.c
-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/perf/hv-24x7.c | 37 +
1 file changed, 29 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/perf/hv-24x7.c b/arch/powerpc/perf/hv-24x7.c
index 9445a82..ead1420 100644
--- a/arch/powerpc/perf/hv-24x7.c
and interface group to be
removed because of the error.
This patch moves the three events groups to the end of the attr groups,
and if create_events_from_catalog() fails to set their attributes, we
set them to NULL in attr_groups.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc
On 二, 2014-11-18 at 15:33 +1100, Michael Ellerman wrote:
On Mon, 2014-17-11 at 02:52:30 UTC, Li Zhong wrote:
It seems nvram_pstore_info's buf_lock is not initialized before
registering, which causes some strange behavior when trying to obtain
the lock during kdump process.
What kind
It seems nvram_pstore_info's buf_lock is not initialized before
registering, which causes some strange behavior when trying to obtain
the lock during kdump process.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/platforms/pseries/nvram.c | 2 ++
1 file changed, 2 insertions
On 二, 2014-10-14 at 15:35 +1100, Michael Ellerman wrote:
On Tue, 2014-10-14 at 10:39 +0800, Li Zhong wrote:
On 二, 2014-10-07 at 08:33 -0700, Nishanth Aravamudan wrote:
On 07.10.2014 [17:28:38 +1100], Michael Ellerman wrote:
On Fri, 2014-10-03 at 16:26 -0700, Nishanth Aravamudan wrote
should send
them
explicitly.
I think they occur every boot, unconditionally, on pseries. Doesn't
prevent boot, just really noisy. I think it'd be good to get them into
-stable.
Li Zhong, can you push them once they get sent upstream?
I guess I only need to send the first two patches
On 三, 2014-10-01 at 15:10 +1000, Anton Blanchard wrote:
Li Zhong points out an issue with our current __get_SP()
implementation. If ftrace function tracing is enabled (ie -pg
profiling using _mcount) we spill a stack frame on 64bit all the
time.
If a function calls __get_SP() and later
should send
them
explicitly.
I think they occur every boot, unconditionally, on pseries. Doesn't
prevent boot, just really noisy. I think it'd be good to get them into
-stable.
Li Zhong, can you push them once they get sent upstream?
Ok, I will send these patches to stable mailing
On 三, 2014-08-27 at 09:41 +0800, Li Zhong wrote:
On 二, 2014-08-26 at 08:10 -0500, Nathan Fontenot wrote:
On 08/25/2014 02:22 AM, Li Zhong wrote:
With commit 2fabf084b, during boottime, cpu_numa_callback() is called
earlier(before their online) for each cpu, and verify_cpu_node_mapping
siblings 1/2/3 and 0 don't belong to the same
node!
As we don't actually do the checking during this early stage, so maybe
we could directly call numa_setup_cpu() in do_init_bootmem().
Cc: Nishanth Aravamudan n...@linux.vnet.ibm.com
Cc: Nathan Fontenot nf...@linux.vnet.ibm.com
Signed-off-by: Li
, but not present cpus, their numa information
will be set up after they are started, as the original code did before commit
2fabf084b6ad.
Cc: Nishanth Aravamudan n...@linux.vnet.ibm.com
Cc: Nathan Fontenot nf...@linux.vnet.ibm.com
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/kernel
the first online node to
numa_cpu_lookup_table instead of 0 ( in case 0 might not be an online node? )
Cc: Nishanth Aravamudan n...@linux.vnet.ibm.com
Cc: Nathan Fontenot nf...@linux.vnet.ibm.com
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/mm/numa.c | 14 --
1 file
On 二, 2014-08-26 at 08:10 -0500, Nathan Fontenot wrote:
On 08/25/2014 02:22 AM, Li Zhong wrote:
With commit 2fabf084b, during boottime, cpu_numa_callback() is called
earlier(before their online) for each cpu, and verify_cpu_node_mapping()
uses cpu_to_node() to check whether siblings
On 五, 2014-08-22 at 15:04 -0700, Nishanth Aravamudan wrote:
On 22.08.2014 [10:12:56 +0800], Li Zhong wrote:
On ???, 2014-08-21 at 08:45 -0700, Nishanth Aravamudan wrote:
On 21.08.2014 [16:14:02 +0800], Li Zhong wrote:
With commit 2fabf084b, during boottime, cpu_numa_callback() is called
don't actually do the checking during this early stage, so maybe
we could directly call numa_setup_cpu() in do_init_bootmem().
Also, as Nish suggested, here it's better to use present cpu mask
instead of possible mask to avoid warning in numa_setup_cpu().
Signed-off-by: Li Zhong zh
!
As we don't actually do the checking during this early stage, so maybe
we could directly call numa_setup_cpu() in do_init_bootmem()?
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/mm/numa.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/powerpc/mm/numa.c
On 四, 2014-08-21 at 08:45 -0700, Nishanth Aravamudan wrote:
On 21.08.2014 [16:14:02 +0800], Li Zhong wrote:
With commit 2fabf084b, during boottime, cpu_numa_callback() is called
earlier(before their online) for each cpu, and verify_cpu_node_mapping()
uses cpu_to_node() to check whether
As opal_message_init() uses machine_early_initcall(powernv, ), and
opal_hmi_handler_init() depends on that early initcall, so it also needs
use machine_* to check the machine_id.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/platforms/powernv/opal-hmi.c | 3 ++-
1 file
path_openat+0x100/0x810
[c00073f97ce0] c0272ea8 do_filp_open+0x58/0xd0
[c00073f97dc0] c025ade8 do_sys_open+0x1b8/0x300
[c00073f97e30] c000a008 syscall_exit+0x0/0x7c
--- Exception: c01 (System Call) at 3fffaabe2854
Signed-off-by: Li Zhong zh
%DAR: 01a3fcf00020b4ac
Virtual PID = 0
ok
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
diff --git a/arch/powerpc/platforms/powernv/opal-takeover.S
b/arch/powerpc/platforms/powernv/opal-takeover.S
index 11a3169..9093540 100644
--- a/arch/powerpc/platforms/powernv/opal-takeover.S
+++ b
DaYu just reminded me that Michael already had a patch removing all the
related code.
Please ignore this patch..
Thanks, Zhong
On Wed, 2014-06-25 at 12:00 +0800, Li Zhong wrote:
In commit 752a6422f, new stack frame is created for parameters.
However, the r1 is added back a little earlier
the memory when continuous doing memory hot-plug/remove
operations, but didn't reclaim the pages already allocated, so the memory usage
will only increase, but won't exceed the value for the largest memory
configuration.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
Cc: Nathan Fontenot nf
This is to be called in vmemmap_free(), leave the implementation on BOOK3E
empty as before.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
Cc: Nathan Fontenot nf...@linux.vnet.ibm.com
---
arch/powerpc/mm/hash_utils_64.c |2 +-
arch/powerpc/mm/init_64.c | 22
vmemmap_free() does the opposite of vmemap_populate().
This patch also puts vmemmap_free() and vmemmap_list_free() into
CONFIG_MEMMORY_HOTPLUG.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
Cc: Nathan Fontenot nf...@linux.vnet.ibm.com
---
arch/powerpc/mm/init_64.c | 85
.
After we adjust start to be the start of the section, it also means it's
aligned with vmemmap as of the sizeof struct page, so we could use
page_to_pfn directly in the loop.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
Cc: Nathan Fontenot nf...@linux.vnet.ibm.com
---
arch/powerpc/mm/init_64
asm be compiled after
r1 being added back to the original value. But as a workaround, maybe we
could move this embedded asm into save_context_stack().
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/kernel/stacktrace.c | 9 -
1 file changed, 4 insertions(+), 5 deletions
easily be outside 32bit range.
Ah, yes, the stack here is obviously at a much higher address than 4GB.
You can add:
Signed-off-by: Anton Blanchard an...@samba.org
And also:
Cc: sta...@vger.kernel.org # 3.14+
OK,
Thanks, Zhong
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
-off-by: Li Zhong zh...@linux.vnet.ibm.com
Signed-off-by: Anton Blanchard an...@samba.org
Cc: sta...@vger.kernel.org # 3.14+
---
arch/powerpc/platforms/pseries/hotplug-cpu.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c
b/arch
[ 247.194751] ---[ end trace d1d21584135396ba ]---
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/platforms/pseries/hotplug-cpu.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c
b/arch/powerpc/platforms
by
* try_offline_node().
*/
void __ref remove_memory(int nid, u64 start, u64 size)
With this lock held, the other process(#1120 above) trying to online the
memory block will retry the system call when calling
lock_device_hotplug_sysfs(), and finally find No such device error.
Signed-off-by: Li Zhong
by
* try_offline_node().
*/
void __ref remove_memory(int nid, u64 start, u64 size)
With this lock held, the other process(#1120 above) trying to online the
memory block will retry the system call when calling
lock_device_hotplug_sysfs(), and finally find No such device error.
Signed-off-by: Li Zhong
48485279 6000 0fe0 3900 393f0038
4b80
[0.897992] ---[ end trace 1eeffdb9f825a556 ]---
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/sysdev/msi_bitmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/sysdev/msi_bitmap.c b/arch
780b17e1 41820078
2fa3
[ 204.774601] ---[ end trace edf1df93cf81e28d ]---
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/platforms/pseries/processor_idle.c |2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/platforms/pseries
On Fri, 2014-01-17 at 12:27 +0530, Aneesh Kumar K.V wrote:
Li Zhong zh...@linux.vnet.ibm.com writes:
It seems that forward declaration couldn't work well with typedef, use
struct spinlock directly to avoiding following build errors:
In file included from include/linux/spinlock.h:81
/include/asm/pgtable-ppc64.h:563: note: previous
declaration of 'spinlock_t' was here
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/include/asm/pgtable-ppc64.h |6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/include/asm/pgtable-ppc64.h
[0.563429] Instruction dump:
[0.563433] 635a0d00 3b61 2fbc 41fe0014 e8810070 7f83e378 486543c1
6000
[0.563450] e81e0022 829f0018 92810090 eaff0010 7efd012a a1210090 8aa10093
3809
[0.563469] ---[ end trace 3be1fd3d950f1716 ]---
Signed-off-by: Li Zhong zh
The patch adjusts the variable type and name for page in
__pte_free_tlb(), which now seems a little confusing.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/include/asm/pgalloc-64.h |4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc
This patch reverts my previous fix, and replace it with the correct
fix from Russell.
And as Russell pointed out -- dma_set_mask_and_coherent() (and the other
dma_set_mask() functions) are really supposed to be used by drivers
only.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch
-dev.dma_mask = viodev-dev.coherent_dma_mask;
}
/* register with generic device framework */
Right that's exactly what I had in mind. Li, can you test this please ?
Sure, and it works.
Tested-by: Li Zhong zh...@linux.vnet.ibm.com
The previous fix using dma_coerce_mask_and_coherent
I encountered following issue:
[0.283035] ibmvscsi 3015: couldn't initialize event pool
[5.688822] ibmvscsi: probe of 3015 failed with error -1
which prevents the storage from being recognized, and the machine from
booting.
After some digging, it seems that it is caused by commit
On Tue, 2013-11-19 at 15:04 +1100, Michael Ellerman wrote:
On Fri, Nov 15, 2013 at 03:36:04PM +0800, Li Zhong wrote:
This is seen when CONFIG_SMP is not enabled:
arch/powerpc/platforms/powernv/rng.c: In function 'rng_init_per_cpu':
arch/powerpc/platforms/powernv/rng.c:74: error: implicit
On Wed, 2013-11-20 at 12:28 +1100, Benjamin Herrenschmidt wrote:
On Tue, 2013-11-19 at 16:11 +0800, Li Zhong wrote:
I encountered following issue:
[0.283035] ibmvscsi 3015: couldn't initialize event pool
[5.688822] ibmvscsi: probe of 3015 failed with error -1
which
-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/platforms/pseries/rng.c |2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/rng.c
b/arch/powerpc/platforms/pseries/rng.c
index a702f1c..62c7838 100644
--- a/arch/powerpc/platforms/pseries/rng.c
This is seen when CONFIG_SMP is not enabled:
arch/powerpc/platforms/powernv/rng.c: In function 'rng_init_per_cpu':
arch/powerpc/platforms/powernv/rng.c:74: error: implicit declaration of
function 'cpu_to_chip_id'
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/platforms
On Tue, 2013-06-11 at 14:03 +0530, Srivatsa S. Bhat wrote:
On 06/11/2013 12:30 PM, Benjamin Herrenschmidt wrote:
On Thu, 2013-05-16 at 18:20 +0800, Li Zhong wrote:
It seems following race is possible:
.../...
vdso_getcpu_init();
#endif
- notify_cpu_starting(cpu
-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/kernel/smp.c |8 +---
1 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index ee7ac5e..c765937 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
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
patch, I listed
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:
enum ctx_state prev_state = exception_enter
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 together
with some other code(already
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
codes, I think we could assume
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
it. 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 zh...@linux.vnet.ibm.com
Acked-by: Frederic Weisbecker fweis...@gmail.com
---
arch/powerpc/include/asm
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 zh...@linux.vnet.ibm.com
---
arch/powerpc/kernel/traps.c | 80
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 zh...@linux.vnet.ibm.com
---
arch/powerpc/kernel/signal.c |5 +
1 file
This patch corresponds to
[PATCH] x86: Use the new schedule_user API on userspace preemption
commit 0430499ce9d78691f3985962021b16bf8f8a8048
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/include/asm/context_tracking.h | 10 ++
arch/powerpc/kernel/entry_64.S
Start context tracking support from pSeries.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
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
the 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
it. 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 zh...@linux.vnet.ibm.com
Acked-by: Frederic Weisbecker fweis...@gmail.com
---
arch/powerpc/include/asm
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 zh...@linux.vnet.ibm.com
---
arch/powerpc/kernel/traps.c | 91
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 zh...@linux.vnet.ibm.com
---
arch/powerpc/kernel/signal.c |5 +
1 file
This patch corresponds to
[PATCH] x86: Use the new schedule_user API on userspace preemption
commit 0430499ce9d78691f3985962021b16bf8f8a8048
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/include/asm/context_tracking.h | 10 ++
arch/powerpc/kernel/entry_64.S
Start context tracking support from pSeries.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
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
On Tue, 2013-05-07 at 10:32 +0800, Li Zhong wrote:
Saw this warning again, and this time from the ret_from_fork path.
It seems we could clear the back chain earlier in copy_thread(), which
could cover both path, and also fix potential lockdep usage in
schedule_tail(), or exception occurred
Saw this warning again, and this time from the ret_from_fork path.
It seems we could clear the back chain earlier in copy_thread(), which
could cover both path, and also fix potential lockdep usage in
schedule_tail(), or exception occurred before we clear the back chain.
Signed-off-by: Li Zhong
Saw this warning again, and this time from the ret_from_fork path.
It seems we could clear the back chain earlier in copy_thread(), which
could cover both path, and also fix potential lockdep usage in
schedule_tail(), or exception occurred before we clear the back chain.
Signed-off-by: Li Zhong
On Thu, 2013-04-18 at 11:46 +1000, Michael Ellerman wrote:
On Wed, May 30, 2012 at 05:31:58PM +0800, Li Zhong wrote:
I'm not sure whether it makes sense to add this dependency to avoid
CONFI_NUMA !CONFIG_SMP.
I want to do this because I saw some build errors on next-tree when
On Mon, 2013-04-15 at 08:56 +0200, Benjamin Herrenschmidt wrote:
On Mon, 2013-04-15 at 13:50 +1000, Paul Mackerras wrote:
On Fri, Apr 12, 2013 at 10:16:59AM +0800, Li Zhong wrote:
It seems that in kernel_unmap_linear_page(), it only checks whether there
is a map
On Mon, 2013-04-15 at 16:32 +1000, Michael Ellerman wrote:
On Fri, Apr 12, 2013 at 10:16:57AM +0800, Li Zhong wrote:
It seems that rflags don't get changed in the repeating loop, so move
it out of the loop.
You've also changed the way new_pte is handled on repeat, but I think
that's OK
On Mon, 2013-04-15 at 16:36 +1000, Michael Ellerman wrote:
On Fri, Apr 12, 2013 at 10:17:00AM +0800, Li Zhong wrote:
This patch tries to fix following issue when CONFIG_DEBUG_PAGEALLOC
is enabled:
Please include a better changelog.
OK, I'll use the following as a template, thank you
On Mon, 2013-04-15 at 13:27 +0200, Benjamin Herrenschmidt wrote:
On Mon, 2013-04-15 at 16:15 +0800, Li Zhong wrote:
So the code is implemented in ppc_md.hpte_remove(), may be called by
__hash_huge_page(), and asm code htab_call_hpte_remove?
This is why the linear mapping
It seems that new_pte and rflags don't get changed in the repeating loop, so
move their assignment out of the loop.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/mm/hugetlbpage-hash64.c |8
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch
Move the logic trying to insert hpte in __hash_page_huge() to an helper
function, so it could also be used by others.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/mm/hash_utils_64.c | 35 ++
arch/powerpc/mm/hugetlbpage-hash64.c | 31
7f63db78 48785781
6000
[ 543.076224] ---[ end trace bd5807e8d6ae186b ]---
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/mm/hash_utils_64.c | 13 +++--
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm
out of the repeating loop, so the
splitting is easier. Patch #3 removes the HPTE_V_BOLTED flag in
kernel_map_linear_page(), it seems not needed based on my understanding.
Changes are split into smaller ones, so each one did only one thing.
Thanks, Zhong
Li Zhong (4):
powerpc: Move
Move the logical trying to insert hpte in __hash_page_huge() to an helper
function, so it could also be used by others.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/mm/hash_utils_64.c | 35 ++
arch/powerpc/mm/hugetlbpage-hash64.c | 31
It seems that rflags don't get changed in the repeating loop, so move
it out of the loop.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/mm/hugetlbpage-hash64.c |8
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/mm/hugetlbpage-hash64.c
It seems that in kernel_unmap_linear_page(), it only checks whether there
is a map in the linear_map_hash_slots array, so seems we don't need bolt
the hpte.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/mm/hash_utils_64.c |2 +-
1 file changed, 1 insertion(+), 1 deletion
0b00 7f63db78 48785781
6000
[ 543.076224] ---[ end trace bd5807e8d6ae186b ]---
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/mm/hash_utils_64.c | 10 ++
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch
On Wed, 2013-04-10 at 12:21 +1000, Michael Ellerman wrote:
On Mon, Feb 25, 2013 at 05:29:35PM +0800, Li Zhong wrote:
This patch tries to fix following issue when CONFIG_DEBUG_PAGEALLOC
is enabled:
[ 543.075675] [ cut here ]
[ 543.075701] kernel BUG at arch
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/hash_utils_64.c
index 360fba8
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
...
diff --git a/arch/powerpc/mm/hash_utils_64
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
check,
alignment, fp
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_user API
it. 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 zh...@linux.vnet.ibm.com
Acked-by: Frederic Weisbecker fweis...@gmail.com
---
arch/powerpc/include/asm
for userspace RCU extended QS
commit 6ba3c97a38803883c2eee489505796cb0a727122
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/include/asm/context_tracking.h | 28 +
arch/powerpc/kernel/exceptions-64s.S|4 +-
arch/powerpc/kernel/traps.c
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 zh...@linux.vnet.ibm.com
---
arch/powerpc/kernel/signal.c |5 +
1 file
This patch corresponds to
[PATCH] x86: Use the new schedule_user API on userspace preemption
commit 0430499ce9d78691f3985962021b16bf8f8a8048
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/include/asm/context_tracking.h | 11 +++
arch/powerpc/kernel/entry_64.S
on 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 zh...@linux.vnet.ibm.com
---
arch/powerpc/include/asm/context_tracking.h | 29 ---
arch/powerpc/kernel/exceptions-64s.S|4
Start context tracking support from pSeries.
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
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
0b00 7f63db78 48785781
6000
[ 543.076224] ---[ end trace bd5807e8d6ae186b ]---
The code is borrowed from that in __hash_page_huge().
Signed-off-by: Li Zhong zh...@linux.vnet.ibm.com
---
arch/powerpc/mm/hash_utils_64.c | 17 +
1 file changed, 17 insertions(+)
diff
On Sun, 2013-02-10 at 15:10 +0100, Frederic Weisbecker wrote:
2013/2/1 Li Zhong zh...@linux.vnet.ibm.com:
This is the exception hooks for context tracking subsystem, including
data access, program check, single step, instruction breakpoint, machine
check,
alignment, fp unavailable
On Thu, 2013-02-07 at 01:29 +0100, Frederic Weisbecker wrote:
2013/2/1 Li Zhong zh...@linux.vnet.ibm.com:
This is the syscall slow path hooks for context tracking subsystem,
corresponding to
[PATCH] x86: Syscall hooks for userspace RCU extended QS
commit
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
it. 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 zh...@linux.vnet.ibm.com
---
arch/powerpc/include/asm/thread_info.h |7 +--
arch/powerpc/kernel
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