Am 07.11.2013 um 08:55 schrieb Benjamin Herrenschmidt
b...@kernel.crashing.org:
On Thu, 2013-11-07 at 08:52 +0100, Alexander Graf wrote:
Am 06.11.2013 um 20:58 schrieb Benjamin Herrenschmidt
b...@kernel.crashing.org:
On Wed, 2013-11-06 at 12:24 +0100, Alexander Graf wrote:
On
On Thu, 2013-11-07 at 09:14 +0100, Alexander Graf wrote:
And ? An explanation isn't going to be clearer than the code in that
case ...
It's pretty non-obvious when you do a git show on that patch in 1 year
from now, as the redundancy is out of scope of what the diff shows.
And ? How would
On 07.11.2013, at 07:22, Liu Ping Fan kernelf...@gmail.com wrote:
Since kvmppc_hv_find_lock_hpte() is called from both virtmode and
realmode, so it can trigger the deadlock.
Suppose the following scene:
Two physical cpuM, cpuN, two VM instances A, B, each VM has a group of vcpus.
If
On 07.11.2013, at 07:22, Liu Ping Fan kernelf...@gmail.com wrote:
ret is assigned twice with the same value, so remove the later one.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
Acked-by: Paul Mackerras pau...@samba.org
I suppose my last request for a patch description was
Hi Peter,
Couple of minor fixes on the arm64 side...
On Wed, Nov 06, 2013 at 01:57:36PM +, Peter Zijlstra wrote:
--- a/arch/arm64/include/asm/barrier.h
+++ b/arch/arm64/include/asm/barrier.h
@@ -35,11 +35,59 @@
#define smp_mb() barrier()
#define smp_rmb() barrier()
2013/11/1 Arnd Bergmann a...@arndb.de:
On Friday 01 November 2013, Alexander Popov wrote:
+ * of_dma_xlate_by_chan_id - Translate dt property to DMA channel by
channel id
+ * @dma_spec:pointer to DMA specifier as found in the device tree
+ * @of_dma: pointer to DMA controller data
Unaligned stores take alignment exceptions on POWER7 running in little-endian.
This is a dumb little-endian base memcpy that prevents unaligned stores.
Once booted the feature fixup code switches over to the VMX copy loops
(which are already endian safe).
The question is what we do before that
On Thu, Nov 07, 2013 at 11:17:41AM +, Will Deacon wrote:
Hi Peter,
Couple of minor fixes on the arm64 side...
On Wed, Nov 06, 2013 at 01:57:36PM +, Peter Zijlstra wrote:
--- a/arch/arm64/include/asm/barrier.h
+++ b/arch/arm64/include/asm/barrier.h
@@ -35,11 +35,59 @@
Hello Becky Bruce,
This is a semi-automatic email about new static checker warnings.
The patch 41151e77a4d9: powerpc: Hugetlb for BookE from Jun 28,
2011, leads to the following Smatch complaint:
arch/powerpc/mm/hugetlbpage-book3e.c:120 flush_hugetlb_page()
warn: variable dereferenced
On Thu, 7 Nov 2013, Alistair Popple wrote:
Thanks. Based on the discussion for the EHCI driver I would like to change
the
compatibility string to usb-ochi (instead of ibm,akebono-ohci). Are you
still happy for me to add the Acked-by with the alternate compatibility (and
of course the
On Thu, 2013-11-07 at 15:17 +0800, Kevin Hao wrote:
It makes no sense to initialize the mpic ipi for the SoC which has
doorbell support. So set the smp_85xx_ops.probe to NULL for this
case. Since the smp_85xx_ops.probe is also used in function
smp_85xx_setup_cpu() to check if we need to invoke
On Thu, Nov 07, 2013 at 03:01:02AM +, Li Xiubo wrote:
The SGTL5000 is based on regulators and when it is disabled, there
will be an error returns directly while the SGTL5000 codec is probing.
What makes you say this?
static int ldo_regulator_register(struct snd_soc_codec *codec,
On Thu, Nov 07, 2013 at 11:34:51AM -0600, Scott Wood wrote:
On Thu, 2013-11-07 at 15:17 +0800, Kevin Hao wrote:
It makes no sense to initialize the mpic ipi for the SoC which has
doorbell support. So set the smp_85xx_ops.probe to NULL for this
case. Since the smp_85xx_ops.probe is also used
On Thu, Nov 7, 2013 at 5:54 PM, Alexander Graf ag...@suse.de wrote:
On 07.11.2013, at 07:22, Liu Ping Fan kernelf...@gmail.com wrote:
Since kvmppc_hv_find_lock_hpte() is called from both virtmode and
realmode, so it can trigger the deadlock.
Suppose the following scene:
Two physical cpuM,
On Thu, Nov 7, 2013 at 6:06 PM, Alexander Graf ag...@suse.de wrote:
On 07.11.2013, at 07:22, Liu Ping Fan kernelf...@gmail.com wrote:
ret is assigned twice with the same value, so remove the later one.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
Acked-by: Paul Mackerras
syscall is a very common behavior inside guest, and this patch
optimizes the path for the emulation of BOOK3S_INTERRUPT_SYSCALL,
so hypervisor can return to guest without heavy exit, i.e, no need
to swap TLB, HTAB,.. etc
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
Compiled, but
On Mon, Nov 4, 2013 at 6:31 PM, Hongbo Zhang hongbo.zh...@freescale.com wrote:
Hi Vinod Koul and Dan Williams,
Ping?
Not much to review from the dmaengine side, just one question below.
It would be helpful if you can send these to the new dmaengine
patchwork at dmaeng...@vger.kernel.org with
On 08.11.2013, at 03:44, Liu Ping Fan kernelf...@gmail.com wrote:
syscall is a very common behavior inside guest, and this patch
optimizes the path for the emulation of BOOK3S_INTERRUPT_SYSCALL,
so hypervisor can return to guest without heavy exit, i.e, no need
to swap TLB, HTAB,.. etc
The
On Fri, 2013-11-08 at 04:10 +0100, Alexander Graf wrote:
On 08.11.2013, at 03:44, Liu Ping Fan kernelf...@gmail.com wrote:
syscall is a very common behavior inside guest, and this patch
optimizes the path for the emulation of BOOK3S_INTERRUPT_SYSCALL,
so hypervisor can return to guest
On Fri, 2013-11-08 at 15:05 +1100, Benjamin Herrenschmidt wrote:
On Fri, 2013-11-08 at 04:10 +0100, Alexander Graf wrote:
On 08.11.2013, at 03:44, Liu Ping Fan kernelf...@gmail.com wrote:
syscall is a very common behavior inside guest, and this patch
optimizes the path for the
* Peter Zijlstra (pet...@infradead.org) wrote:
[...]
Hi Peter,
Looking at this simplified version of perf's ring buffer
synchronization, I get concerned about the following issue:
/*
* One important detail is that the kbuf part and the kbuf_writer() are
* strictly per cpu and we can thus
On Fri, Nov 8, 2013 at 11:10 AM, Alexander Graf ag...@suse.de wrote:
On 08.11.2013, at 03:44, Liu Ping Fan kernelf...@gmail.com wrote:
syscall is a very common behavior inside guest, and this patch
optimizes the path for the emulation of BOOK3S_INTERRUPT_SYSCALL,
so hypervisor can return to
On Fri, Nov 8, 2013 at 12:11 PM, Benjamin Herrenschmidt
b...@kernel.crashing.org wrote:
On Fri, 2013-11-08 at 15:05 +1100, Benjamin Herrenschmidt wrote:
On Fri, 2013-11-08 at 04:10 +0100, Alexander Graf wrote:
On 08.11.2013, at 03:44, Liu Ping Fan kernelf...@gmail.com wrote:
syscall is a
Highlight the lock pair for the reader. (and later it will the
place to hide the detail about preemption disable)
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
arch/powerpc/include/asm/kvm_book3s.h | 1 +
arch/powerpc/kvm/book3s_64_mmu_hv.c | 7 ++-
v2-v3:
introduce kvmppc_hv_unlock_hpte() to pair with kvmppc_hv_find_lock_hpte()
and hide the preemption detail inside this pair from the callers
Liu Ping Fan (2):
powerpc: kvm: pair kvmppc_hv_find_lock_hpte with _unlock_hpte
powerpc: kvm: fix rare but potential deadlock scene
Since kvmppc_hv_find_lock_hpte() is called from both virtmode and
realmode, so it can trigger the deadlock.
Suppose the following scene:
Two physical cpuM, cpuN, two VM instances A, B, each VM has a group of vcpus.
If on cpuM, vcpu_A_1 holds bitlock X (HPTE_V_HVLOCK), then is switched out,
and
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