Hi Peter,
On Thu, 2018-03-15 at 12:28 +0100, Peter Zijlstra wrote:
> On Thu, Mar 15, 2018 at 09:12:09AM +, Alexey Brodkin wrote:
> > On Thu, 2018-03-15 at 09:18 +0100, Peter Zijlstra wrote:
> > > Also, it might make sense to stuff this implementation in some lib/ file
> > > somewhere and make
Hi Vineet,
On Thu, 2018-03-15 at 09:38 -0700, Vineet Gupta wrote:
> On 03/15/2018 02:27 AM, Adrian Hunter wrote:
> > Please try:
> >
> > perf record -a -e mmc:* -- bonnie++ -u root -r 256 -s 512 -x 1 -d /mnt
> >
> > and share the resulting perf.data file when you are able
> > to reproduce th
On Thu, 2018-03-15 at 14:39 +0100, Ulf Hansson wrote:
> On 15 March 2018 at 14:18, Evgeniy Didin wrote:
> > Hello Ulf,
> >
> > On Thu, 2018-03-15 at 10:57 +0100, Ulf Hansson wrote:
> > > On 14 March 2018 at 20:30, Evgeniy Didin
> > > wrote:
> > > > It was found that in IDMAC mode after soft-res
+CC some more folks for intc/irq insights - please see question at the bottom !
On 03/15/2018 02:39 AM, Alexey Brodkin wrote:
Hi Peter,
On Thu, 2018-03-15 at 09:27 +0100, Peter Zijlstra wrote:
On Wed, Mar 14, 2018 at 01:19:01PM -0700, Vineet Gupta wrote:
+CC Peter since we have his attention
On 03/15/2018 02:27 AM, Adrian Hunter wrote:
Please try:
perf record -a -e mmc:* -- bonnie++ -u root -r 256 -s 512 -x 1 -d /mnt
and share the resulting perf.data file when you are able
to reproduce the hung task message.
You may want to add this patch first:
https://marc.info/
On 15 March 2018 at 14:18, Evgeniy Didin wrote:
> Hello Ulf,
>
> On Thu, 2018-03-15 at 10:57 +0100, Ulf Hansson wrote:
>> On 14 March 2018 at 20:30, Evgeniy Didin wrote:
>> > It was found that in IDMAC mode after soft-reset driver switches
>> > to PIO mode.
>> >
>> > That's what happens in case o
Hello Ulf,
On Thu, 2018-03-15 at 10:57 +0100, Ulf Hansson wrote:
> On 14 March 2018 at 20:30, Evgeniy Didin wrote:
> > It was found that in IDMAC mode after soft-reset driver switches
> > to PIO mode.
> >
> > That's what happens in case of DTO timeout overflow calculation failure:
> > 1. soft-re
On Thu, Mar 15, 2018 at 09:12:09AM +, Alexey Brodkin wrote:
> On Thu, 2018-03-15 at 09:18 +0100, Peter Zijlstra wrote:
> > Also, it might make sense to stuff this implementation in some lib/ file
> > somewhere and make all platforms that need it use the same code, afaict
> > there really isn't
On 14 March 2018 at 20:30, Evgeniy Didin wrote:
> It was found that in IDMAC mode after soft-reset driver switches
> to PIO mode.
>
> That's what happens in case of DTO timeout overflow calculation failure:
> 1. soft-reset is called
> 2. driver restarts dma
> 3. descriptors states are checked, one
Hi Peter,
On Thu, 2018-03-15 at 09:27 +0100, Peter Zijlstra wrote:
> On Wed, Mar 14, 2018 at 01:19:01PM -0700, Vineet Gupta wrote:
> > +CC Peter since we have his attention ;-)
>
> Yeah, timezone collision there, I typically sleep at 1am ;-)
>
> > On 03/01/2018 07:13 AM, Alexey Brodkin wrote:
>
On 14/03/18 14:32, Evgeniy Didin wrote:
> Hi Adrian,
>>>
>>> Was the performance affected? i.e. the results from bonnie++
>>
>> I have run bonnie++ several times before and after mentioned commit. Here is
>> output:
>> --<8---
Hi Peter,
On Thu, 2018-03-15 at 09:18 +0100, Peter Zijlstra wrote:
> On Wed, Mar 14, 2018 at 08:38:53PM +, Alexey Brodkin wrote:
> > > int sys_cmpxchg(u32 __user *user_ptr, u32 old, u32 new)
> > > {
> > > u32 val;
> > > int ret;
> > >
> > > again:
> > > ret = 0;
> > >
> > > preempt_d
On Wed, Mar 14, 2018 at 01:19:01PM -0700, Vineet Gupta wrote:
> +CC Peter since we have his attention ;-)
Yeah, timezone collision there, I typically sleep at 1am ;-)
> On 03/01/2018 07:13 AM, Alexey Brodkin wrote:
> > Hi Vineet,
> >
> > Just noticed that in comments for smp_call_function_many()
On Wed, Mar 14, 2018 at 08:38:53PM +, Alexey Brodkin wrote:
> > int sys_cmpxchg(u32 __user *user_ptr, u32 old, u32 new)
> > {
> > u32 val;
> > int ret;
> >
> > again:
> > ret = 0;
> >
> > preempt_disable();
> > val = get_user(user_ptr);
> > if (val == old)
> >
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