On Tue, Oct 03, 2017 at 02:36:42AM -0400, Jon Masters wrote:
> On 09/29/2017 04:56 AM, Will Deacon wrote:
>
> > The full fix isn't just cosmetic; it's also addressing the wider problem
> > of unannotated racing page table accesses outside of the specific failure
> > case we've run into.
>
> Let u
On 09/29/2017 04:56 AM, Will Deacon wrote:
> The full fix isn't just cosmetic; it's also addressing the wider problem
> of unannotated racing page table accesses outside of the specific failure
> case we've run into.
Let us know if there are additional tests we should be running on the
Red Hat en
[+ Timur]
On Thu, Sep 28, 2017 at 03:38:00PM -0400, Jon Masters wrote:
> On 09/27/2017 11:49 AM, Will Deacon wrote:
>
> > The moral of the story is that read-after-read (same address) ordering
> > *only*
> > applies if READ_ONCE is used consistently. This means we need to fix page
> > table dere
On 09/27/2017 11:49 AM, Will Deacon wrote:
> The moral of the story is that read-after-read (same address) ordering *only*
> applies if READ_ONCE is used consistently. This means we need to fix page
> table dereferences in the core code as well as the arch code to avoid this
> problem. The two RFC
On 9/27/2017 9:49 AM, Will Deacon wrote:
> Hi,
>
> We recently had a crash report[1] on arm64 that involved a bad dereference
> in the page_vma_mapped code during ext4 writeback with THP active. I can
> reproduce this on -rc2:
>
> [ 254.032812] PC is at check_pte+0x20/0x170
> [ 254.032948] LR i
On Wed, Sep 27, 2017 at 04:49:27PM +0100, Will Deacon wrote:
> Hi,
>
> We recently had a crash report[1] on arm64 that involved a bad dereference
> in the page_vma_mapped code during ext4 writeback with THP active. I can
> reproduce this on -rc2:
>
> [ 254.032812] PC is at check_pte+0x20/0x170
>
Hi,
We recently had a crash report[1] on arm64 that involved a bad dereference
in the page_vma_mapped code during ext4 writeback with THP active. I can
reproduce this on -rc2:
[ 254.032812] PC is at check_pte+0x20/0x170
[ 254.032948] LR is at page_vma_mapped_walk+0x2e0/0x540
[...]
[ 254.036114
7 matches
Mail list logo