On Thu, Mar 22, 2018 at 3:48 AM, David Laight wrote:
> From: Linus Torvalds
>>
>> Note that we definitely have seen hardware that *depends* on the
>> regular memcpy_fromio()" not doing big reads. I don't know how
>> hardware people screw it up, but it's clearly possible.
[ That should have been "
From: Linus Torvalds
> Sent: 22 March 2018 01:27
> On Tue, Mar 20, 2018 at 7:42 AM, Alexander Duyck
> wrote:
> >
> > Instead of framing this as an enhanced version of the read/write ops
> > why not look at replacing or extending something like the
> > memcpy_fromio or memcpy_toio operations?
>
>
On Tue, Mar 20, 2018 at 7:42 AM, Alexander Duyck
wrote:
>
> Instead of framing this as an enhanced version of the read/write ops
> why not look at replacing or extending something like the
> memcpy_fromio or memcpy_toio operations?
Yes, doing something like "memcpy_fromio_avx()" is much more
pala
On Tuesday, March 03/20/18, 2018 at 20:12:15 +0530, Alexander Duyck wrote:
> On Tue, Mar 20, 2018 at 6:32 AM, Rahul Lakkireddy
> wrote:
> > On Monday, March 03/19/18, 2018 at 20:13:10 +0530, Thomas Gleixner wrote:
> >> On Mon, 19 Mar 2018, Rahul Lakkireddy wrote:
> >>
> >> > Use VMOVDQU AVX CPU in
On Tuesday, March 03/20/18, 2018 at 20:10:19 +0530, David Laight wrote:
> From: Rahul Lakkireddy
> > Sent: 20 March 2018 13:32
> ...
> > On High Availability Server, the logs of the failing system must be
> > collected as quickly as possible. So, we're concerned with the amount
> > of time taken t
On Tuesday, March 03/20/18, 2018 at 19:14:46 +0530, Andy Shevchenko wrote:
> On Tue, Mar 20, 2018 at 3:32 PM, Rahul Lakkireddy
> wrote:
> > On Monday, March 03/19/18, 2018 at 20:13:10 +0530, Thomas Gleixner wrote:
> >> On Mon, 19 Mar 2018, Rahul Lakkireddy wrote:
>
> >> Aside of that I very much
On Tue, Mar 20, 2018 at 6:32 AM, Rahul Lakkireddy
wrote:
> On Monday, March 03/19/18, 2018 at 20:13:10 +0530, Thomas Gleixner wrote:
>> On Mon, 19 Mar 2018, Rahul Lakkireddy wrote:
>>
>> > Use VMOVDQU AVX CPU instruction when available to do 256-bit
>> > IO read and write.
>>
>> That's not what th
From: Rahul Lakkireddy
> Sent: 20 March 2018 13:32
...
> On High Availability Server, the logs of the failing system must be
> collected as quickly as possible. So, we're concerned with the amount
> of time taken to collect our large on-chip memory. We see improvement
> in doing 256-bit reads at
On Tue, Mar 20, 2018 at 3:32 PM, Rahul Lakkireddy
wrote:
> On Monday, March 03/19/18, 2018 at 20:13:10 +0530, Thomas Gleixner wrote:
>> On Mon, 19 Mar 2018, Rahul Lakkireddy wrote:
>> Aside of that I very much doubt that this is faster than 4 consecutive
>> 64bit reads/writes as you have the full
On Monday, March 03/19/18, 2018 at 20:13:10 +0530, Thomas Gleixner wrote:
> On Mon, 19 Mar 2018, Rahul Lakkireddy wrote:
>
> > Use VMOVDQU AVX CPU instruction when available to do 256-bit
> > IO read and write.
>
> That's not what the patch does. See below.
>
> > Signed-off-by: Rahul Lakkireddy
On Mon, 19 Mar 2018, Rahul Lakkireddy wrote:
> Use VMOVDQU AVX CPU instruction when available to do 256-bit
> IO read and write.
That's not what the patch does. See below.
> Signed-off-by: Rahul Lakkireddy
> Signed-off-by: Ganesh Goudar
That Signed-off-by chain is wrong
> +#ifdef CONFIG_
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