> Hi Helge,
> Could you provide me with the test case(s) you are running to
> reproduce the problem? I could test this on aliasing D-cache on ARM
> as well. Since kmap/kunmap do not flush in general on ARM, we
> might need the explicit flushes here.
Just google for aio-stress.c (e.g.
https://git
Hi Helge,
On Sun, Nov 17, 2013 at 10:23:08PM +0100, Helge Deller wrote:
> On 11/16/2013 09:09 PM, Benjamin LaHaise wrote:
> > On Sat, Nov 16, 2013 at 09:07:18PM +0100, Simon Baatz wrote:
> >> On Fri, Nov 15, 2013 at 02:42:05PM -0800, James Bottomley wrote:
> >>> On Fri, 2013-11-15 at 23:05 +0100,
On Sun, 2013-11-17 at 20:15 -0500, John David Anglin wrote:
> On 17-Nov-13, at 7:52 PM, James Bottomley wrote:
>
> >> +void flush_user_dcache_page(struct page *page);
> >> +
> >
> > The split into flush_kernel.. and flush_user.. is pointless. We
> > have no
> > use for a flush_user_.. API becau
On 17-Nov-13, at 7:52 PM, James Bottomley wrote:
+void flush_user_dcache_page(struct page *page);
+
The split into flush_kernel.. and flush_user.. is pointless. We
have no
use for a flush_user_.. API because it's not part of the standard
linux
one. Plus it's going to confuse those who c
On 17-Nov-13, at 6:47 PM, Helge Deller wrote:
I only changed kunmap_parisc() to always call
flush_kernel_dcache_page_addr(addr) - independend if we are on a
PA8800/8900
CPU or not - which is what you proposed in your original mail.
In which case the flushes in clear_user_page() and copy_use
On Mon, 2013-11-18 at 00:47 +0100, Helge Deller wrote:
> * James Bottomley :
> > On Sun, 2013-11-17 at 22:23 +0100, Helge Deller wrote:
> > > On 11/16/2013 09:09 PM, Benjamin LaHaise wrote:
> > > > On Sat, Nov 16, 2013 at 09:07:18PM +0100, Simon Baatz wrote:
> > > >> On Fri, Nov 15, 2013 at 02:42:0
* James Bottomley :
> On Sun, 2013-11-17 at 22:23 +0100, Helge Deller wrote:
> > On 11/16/2013 09:09 PM, Benjamin LaHaise wrote:
> > > On Sat, Nov 16, 2013 at 09:07:18PM +0100, Simon Baatz wrote:
> > >> On Fri, Nov 15, 2013 at 02:42:05PM -0800, James Bottomley wrote:
> > >>> On Fri, 2013-11-15 at 2
On Sun, 2013-11-17 at 22:23 +0100, Helge Deller wrote:
> On 11/16/2013 09:09 PM, Benjamin LaHaise wrote:
> > On Sat, Nov 16, 2013 at 09:07:18PM +0100, Simon Baatz wrote:
> >> On Fri, Nov 15, 2013 at 02:42:05PM -0800, James Bottomley wrote:
> >>> On Fri, 2013-11-15 at 23:05 +0100, Helge Deller wrote
On 11/16/2013 09:09 PM, Benjamin LaHaise wrote:
> On Sat, Nov 16, 2013 at 09:07:18PM +0100, Simon Baatz wrote:
>> On Fri, Nov 15, 2013 at 02:42:05PM -0800, James Bottomley wrote:
>>> On Fri, 2013-11-15 at 23:05 +0100, Helge Deller wrote:
When a user page mapping is released via kunmap*() funct
On 16-Nov-13, at 5:37 PM, James Bottomley wrote:
On Sat, 2013-11-16 at 17:32 -0500, John David Anglin wrote:
On 16-Nov-13, at 5:06 PM, James Bottomley wrote:
On Sat, 2013-11-16 at 21:07 +0100, Simon Baatz wrote:
On Fri, Nov 15, 2013 at 02:42:05PM -0800, James Bottomley wrote:
On Fri, 2013-1
On 16-Nov-13, at 5:06 PM, James Bottomley wrote:
On Sat, 2013-11-16 at 21:07 +0100, Simon Baatz wrote:
On Fri, Nov 15, 2013 at 02:42:05PM -0800, James Bottomley wrote:
On Fri, 2013-11-15 at 23:05 +0100, Helge Deller wrote:
When a user page mapping is released via kunmap*() functions, the
D-c
On Sat, 2013-11-16 at 17:32 -0500, John David Anglin wrote:
> On 16-Nov-13, at 5:06 PM, James Bottomley wrote:
>
> > On Sat, 2013-11-16 at 21:07 +0100, Simon Baatz wrote:
> >> On Fri, Nov 15, 2013 at 02:42:05PM -0800, James Bottomley wrote:
> >>> On Fri, 2013-11-15 at 23:05 +0100, Helge Deller wro
On Sat, 2013-11-16 at 21:07 +0100, Simon Baatz wrote:
> On Fri, Nov 15, 2013 at 02:42:05PM -0800, James Bottomley wrote:
> > On Fri, 2013-11-15 at 23:05 +0100, Helge Deller wrote:
> > > When a user page mapping is released via kunmap*() functions, the D-cache
> > > needs
> > > to be flushed via fl
On Sat, Nov 16, 2013 at 09:07:18PM +0100, Simon Baatz wrote:
> On Fri, Nov 15, 2013 at 02:42:05PM -0800, James Bottomley wrote:
> > On Fri, 2013-11-15 at 23:05 +0100, Helge Deller wrote:
> > > When a user page mapping is released via kunmap*() functions, the D-cache
> > > needs
> > > to be flushed
On Fri, Nov 15, 2013 at 02:42:05PM -0800, James Bottomley wrote:
> On Fri, 2013-11-15 at 23:05 +0100, Helge Deller wrote:
> > When a user page mapping is released via kunmap*() functions, the D-cache
> > needs
> > to be flushed via flush_dcache_page() to avoid D-cache aliasing issues.
> >
> > Thi
On Fri, 2013-11-15 at 23:05 +0100, Helge Deller wrote:
> When a user page mapping is released via kunmap*() functions, the D-cache
> needs
> to be flushed via flush_dcache_page() to avoid D-cache aliasing issues.
>
> This patch fixes aio on the parisc platform (and probably others).
This should
When a user page mapping is released via kunmap*() functions, the D-cache needs
to be flushed via flush_dcache_page() to avoid D-cache aliasing issues.
This patch fixes aio on the parisc platform (and probably others).
Signed-off-by: Helge Deller
To: Benjamin LaHaise
To: linux-...@kvack.org
Cc:
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