On Thu, Aug 13, 2015 at 9:11 PM, David Miller wrote:
> From: James Bottomley
>> At least on some PA architectures, you have to be very careful.
>> Improperly managed, multiple aliases will cause the system to crash
>> (actually a machine check in the cache chequerboard). For the most
>> temperame
From: James Bottomley
Date: Thu, 13 Aug 2015 20:59:20 -0700
> On Thu, 2015-08-13 at 20:30 -0700, Dan Williams wrote:
>> On Thu, Aug 13, 2015 at 7:31 AM, Christoph Hellwig wrote:
>> > On Wed, Aug 12, 2015 at 09:01:02AM -0700, Linus Torvalds wrote:
>> >> I'm assuming that anybody who wants to use
On Thu, 2015-08-13 at 20:30 -0700, Dan Williams wrote:
> On Thu, Aug 13, 2015 at 7:31 AM, Christoph Hellwig wrote:
> > On Wed, Aug 12, 2015 at 09:01:02AM -0700, Linus Torvalds wrote:
> >> I'm assuming that anybody who wants to use the page-less
> >> scatter-gather lists always does so on memory th
On Thu, Aug 13, 2015 at 7:31 AM, Christoph Hellwig wrote:
> On Wed, Aug 12, 2015 at 09:01:02AM -0700, Linus Torvalds wrote:
>> I'm assuming that anybody who wants to use the page-less
>> scatter-gather lists always does so on memory that isn't actually
>> virtually mapped at all, or only does so o
On Wed, Aug 12, 2015 at 09:01:02AM -0700, Linus Torvalds wrote:
> I'm assuming that anybody who wants to use the page-less
> scatter-gather lists always does so on memory that isn't actually
> virtually mapped at all, or only does so on sane architectures that
> are cache coherent at a physical lev
On Wed, Aug 12, 2015 at 12:05 AM, Christoph Hellwig wrote:
> Make all cache invalidation conditional on sg_has_page() and use
> sg_phys to get the physical address directly.
So this worries me a bit (I'm just reacting to one random patch in the series).
The reason?
I think this wants a big honk
Make all cache invalidation conditional on sg_has_page() and use
sg_phys to get the physical address directly.
Signed-off-by: Christoph Hellwig
---
arch/parisc/kernel/pci-dma.c | 29 ++---
1 file changed, 18 insertions(+), 11 deletions(-)
diff --git a/arch/parisc/kernel/
