Hi Peter,
On Mon, 2018-07-09 at 17:53 +0300, Alexey Brodkin wrote:
> Hi Peter,
>
> On Mon, 2018-07-09 at 16:49 +0200, Peter Zijlstra wrote:
> > On Mon, Jul 09, 2018 at 02:33:26PM +, Alexey Brodkin wrote:
> > > > In fact, since alloc_dr() uses kmalloc() to allocate the entire thing,
> > > > it
On 07/09/2018 09:10 AM, David Laight wrote:
> From: Mark Rutland
>> Sent: 09 July 2018 16:49
>>
>> On Mon, Jul 09, 2018 at 05:45:21PM +0200, Peter Zijlstra wrote:
>>> On Mon, Jul 09, 2018 at 05:34:27PM +0200, Peter Zijlstra wrote:
On Mon, Jul 09, 2018 at 04:29:58PM +0100, Mark Rutland wrote:
>
From: Mark Rutland
> Sent: 09 July 2018 16:49
>
> On Mon, Jul 09, 2018 at 05:45:21PM +0200, Peter Zijlstra wrote:
> > On Mon, Jul 09, 2018 at 05:34:27PM +0200, Peter Zijlstra wrote:
> > > On Mon, Jul 09, 2018 at 04:29:58PM +0100, Mark Rutland wrote:
> > > > Shouldn't that be 8? AFAICT, __alignof__
On Mon, Jul 09, 2018 at 05:45:21PM +0200, Peter Zijlstra wrote:
> On Mon, Jul 09, 2018 at 05:34:27PM +0200, Peter Zijlstra wrote:
> > On Mon, Jul 09, 2018 at 04:29:58PM +0100, Mark Rutland wrote:
> > > Shouldn't that be 8? AFAICT, __alignof__(unsigned long long) is 8 on
> > > x86_32:
> >
> > Curio
On Mon, Jul 09, 2018 at 05:34:27PM +0200, Peter Zijlstra wrote:
> On Mon, Jul 09, 2018 at 04:29:58PM +0100, Mark Rutland wrote:
> > Shouldn't that be 8? AFAICT, __alignof__(unsigned long long) is 8 on
> > x86_32:
>
> Curious, I wonder why we put that align in atomic64_32 then.
Shiny, look at this
On Mon, Jul 09, 2018 at 04:29:58PM +0100, Mark Rutland wrote:
> Shouldn't that be 8? AFAICT, __alignof__(unsigned long long) is 8 on
> x86_32:
Curious, I wonder why we put that align in atomic64_32 then.
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On Mon, Jul 09, 2018 at 04:49:25PM +0200, Peter Zijlstra wrote:
> On Mon, Jul 09, 2018 at 02:33:26PM +, Alexey Brodkin wrote:
> > > In fact, since alloc_dr() uses kmalloc() to allocate the entire thing,
> > > it is impossible to guarantee a larger alignment than kmalloc does.
> >
> > Well but
On Mon, Jul 09, 2018 at 02:33:26PM +, Alexey Brodkin wrote:
> > In fact, since alloc_dr() uses kmalloc() to allocate the entire thing,
> > it is impossible to guarantee a larger alignment than kmalloc does.
>
> Well but 4-bytes [which is critical for atomic64_t] should be much less
> than a sa
On Mon, Jul 09, 2018 at 03:02:08PM +, David Laight wrote:
> Mostly related to the fpu - probably including the fpu save area.
So for the FPU save area in particular I know we play some horrific
games. As to the rest I really dont know.
I wouldn't mind it being changed, but from a cursory loo
From: Peter Zijlstra
> Sent: 09 July 2018 15:49
> On Mon, Jul 09, 2018 at 02:33:26PM +, Alexey Brodkin wrote:
> > > In fact, since alloc_dr() uses kmalloc() to allocate the entire thing,
> > > it is impossible to guarantee a larger alignment than kmalloc does.
> >
> > Well but 4-bytes [which is
Hi Peter,
On Mon, 2018-07-09 at 16:49 +0200, Peter Zijlstra wrote:
> On Mon, Jul 09, 2018 at 02:33:26PM +, Alexey Brodkin wrote:
> > > In fact, since alloc_dr() uses kmalloc() to allocate the entire thing,
> > > it is impossible to guarantee a larger alignment than kmalloc does.
> >
> > Well
Hi Peter,
On Mon, 2018-07-09 at 16:10 +0200, Peter Zijlstra wrote:
> On Mon, Jul 09, 2018 at 04:07:17PM +0200, Peter Zijlstra wrote:
> > On Mon, Jul 09, 2018 at 04:45:50PM +0300, Alexey Brodkin wrote:
> > > --- a/drivers/base/devres.c
> > > +++ b/drivers/base/devres.c
> > > @@ -24,8 +24,12 @@ stru
On Mon, Jul 09, 2018 at 04:07:17PM +0200, Peter Zijlstra wrote:
> On Mon, Jul 09, 2018 at 04:45:50PM +0300, Alexey Brodkin wrote:
> > --- a/drivers/base/devres.c
> > +++ b/drivers/base/devres.c
> > @@ -24,8 +24,12 @@ struct devres_node {
> >
> > struct devres {
> > struct devres_node
On Mon, Jul 9, 2018 at 4:04 PM Mark Rutland wrote:
> On Mon, Jul 09, 2018 at 03:54:09PM +0200, Peter Zijlstra wrote:
> > On Mon, Jul 09, 2018 at 04:45:50PM +0300, Alexey Brodkin wrote:
> > > diff --git a/drivers/base/devres.c b/drivers/base/devres.c
> > > index f98a097e73f2..d65327cb83c9 100644
>
Hi Peter,
On Mon, 2018-07-09 at 15:54 +0200, Peter Zijlstra wrote:
> On Mon, Jul 09, 2018 at 04:45:50PM +0300, Alexey Brodkin wrote:
> > diff --git a/drivers/base/devres.c b/drivers/base/devres.c
> > index f98a097e73f2..d65327cb83c9 100644
> > --- a/drivers/base/devres.c
> > +++ b/drivers/base/dev
On Mon, Jul 09, 2018 at 04:45:50PM +0300, Alexey Brodkin wrote:
> --- a/drivers/base/devres.c
> +++ b/drivers/base/devres.c
> @@ -24,8 +24,12 @@ struct devres_node {
>
> struct devres {
> struct devres_node node;
> - /* -- 3 pointers */
> - unsigned long long
On Mon, Jul 09, 2018 at 03:54:09PM +0200, Peter Zijlstra wrote:
> On Mon, Jul 09, 2018 at 04:45:50PM +0300, Alexey Brodkin wrote:
> > diff --git a/drivers/base/devres.c b/drivers/base/devres.c
> > index f98a097e73f2..d65327cb83c9 100644
> > --- a/drivers/base/devres.c
> > +++ b/drivers/base/devres.
On Mon, Jul 09, 2018 at 04:45:50PM +0300, Alexey Brodkin wrote:
> diff --git a/drivers/base/devres.c b/drivers/base/devres.c
> index f98a097e73f2..d65327cb83c9 100644
> --- a/drivers/base/devres.c
> +++ b/drivers/base/devres.c
> @@ -24,8 +24,12 @@ struct devres_node {
>
> struct devres {
>
data[] must be 64-bit aligned even on 32-bit architectures because
it might be accessed by instructions that require aligned memory arguments.
One example is "atomic64_t" type accessed by special atomic instructions
which may read/write entire 64-bit word.
Atomic instructions are a bit special co
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