On Thu, Sep 11, 2014 at 6:26 PM, Christian Borntraeger
wrote:
> Folks,
>
> we have seen the following bug with 3.16 as a KVM guest. It suspect the
> blk-mq rework that happened between 3.15 and 3.16, but it can be something
> completely different.
>
Care to share how you reproduce the issue?
>
On Wed, Sep 17, 2014 at 3:59 PM, Christian Borntraeger
wrote:
> On 09/12/2014 10:09 PM, Christian Borntraeger wrote:
>> On 09/12/2014 01:54 PM, Ming Lei wrote:
>>> On Thu, Sep 11, 2014 at 6:26 PM, Christian Borntraeger
>>> wrote:
>>>> Folks,
>>>&g
cause:
>
> tags->rqs[..] is not initialized with zeroes (via alloc_pages_node in
> blk-mq.c:blk_mq_init_rq_map()).
Yes, it may cause problem when the request is allocated at the 1st time,
and timeout handler may comes just after the allocation and before its
initialization, then oops t
tag_to_rq and the
> calling
> method to do the wrong thing.
Yes, clearing rq->cmd_flags should be enough.
And looks better to move rq initialization to __blk_mq_free_request()
too, otherwise timeout still may see old cmd_flags and rq->q before
rq's new initialization.
Thanks,
()
>> too, otherwise timeout still may see old cmd_flags and rq->q before
>> rq's new initialization.
>
> Yes, __blk_mq_free_request() should also reset at least rq->cmd_flags, and I
> think we can remove the initialization from __blk_mq_alloc_request().
>
> David
>
>>
>>
>> Thanks,
>
--
Ming Lei
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n't work in QEMU.
Signed-off-by: Ming Lei
---
arch/arm/kvm/Kconfig |1 +
arch/arm/kvm/Makefile |2 +-
arch/arm/kvm/arm.c |1 +
arch/arm/kvm/mmio.c| 19 +++
arch/arm64/kvm/Kconfig |1 +
5 files changed, 23 insertions(+), 1 deletion(-)
diff --git a/
On Tue, Nov 18, 2014 at 11:24 PM, Ming Lei wrote:
> From Documentation/virtual/kvm/api.txt, all ARCHs should support
> ioeventfd.
>
> Also ARM VM has supported PCI bus already, and ARM64 will do too,
> ioeventfd is required for some popular devices, like virtio-blk
> and virtio
n't work in QEMU.
This patch has been tested on both ARM and ARM64.
Signed-off-by: Ming Lei
---
v1:
- make eventfd.o built in ARM64
arch/arm/kvm/Kconfig|1 +
arch/arm/kvm/Makefile |2 +-
arch/arm/kvm/arm.c |1 +
arch/arm/kvm/mmio.c | 19 +
Hi Eric,
Thanks for your FYI.
On Fri, Nov 21, 2014 at 8:58 PM, Eric Auger wrote:
> Hi Ming,
>
> for your information there is a series written by Antonios (added in CC)
> https://lists.cs.columbia.edu/pipermail/kvmarm/2014-March/008416.html
> exactly on the same topic.
>
> The thread was reactiv
ter
applying the 5 patches, qemu can boot kernel successfully, otherwise
kernel can't be booted from qemu.
Thanks Marc.
Thanks,
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On Wed, Mar 5, 2014 at 1:23 PM, Ming Lei wrote:
> On Tue, Mar 4, 2014 at 10:27 AM, Marc Zyngier
>>
>> Marc Zyngier (12):
>> arm64: KVM: force cache clean on page fault when caches are off
>> arm64: KVM: allows discrimination of AArch32 sysreg access
>> arm
On Wed, Mar 5, 2014 at 5:16 PM, Anup Patel wrote:
> On Wed, Mar 5, 2014 at 10:55 AM, Ming Lei wrote:
>> On Wed, Mar 5, 2014 at 1:23 PM, Ming Lei wrote:
>>> On Tue, Mar 4, 2014 at 10:27 AM, Marc Zyngier
>>>>
>>>> Marc Zyngier (12):
>>>> a
le lock on cpu_add_remove_lock.
Considered that both two functions are only called inside
kvm_arch_init() with holding cpu_add_remove_lock, so simply use
__register_cpu_notifier() to fix the problem.
Cc: Paolo Bonzini
Cc: Christoffer Dall
Cc: Srivatsa S. Bhat
Cc: Rafael J. Wysocki
Signed-off-by
~2000
when running kernel building load in VM from APM xgene KVM host,
so the effect is very small, and the difference can't be observed
in my test at all.
Cc: Dann Frazier
Cc: Christoffer Dall
Cc: Marc Zyngier
Cc: kvm...@lists.cs.columbia.edu
Cc: kvm@vger.kernel.org
Signed-off-by: Ming L
On Wed, Sep 2, 2015 at 6:25 PM, Christoffer Dall
wrote:
> On Wed, Sep 02, 2015 at 02:31:21PM +0800, Ming Lei wrote:
>> This patch removes config option of KVM_ARM_MAX_VCPUS,
>> and like other ARCHs, just choose the maximum allowed
>> value from hardware, and follows the r
On Wed, Sep 2, 2015 at 7:42 PM, Ming Lei wrote:
> On Wed, Sep 2, 2015 at 6:25 PM, Christoffer Dall
> wrote:
>> On Wed, Sep 02, 2015 at 02:31:21PM +0800, Ming Lei wrote:
>>> This patch removes config option of KVM_ARM_MAX_VCPUS,
>>> and like other ARCHs, just choose
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