On Tue, Oct 08, 2019 at 03:43:19PM -0700, Palmer Dabbelt wrote:
> > diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c
> > index deeb820bd855..ea8f301de65b 100644
> > --- a/arch/riscv/mm/fault.c
> > +++ b/arch/riscv/mm/fault.c
> > @@ -111,11 +111,12 @@ asmlinkage void do_page_fault(struct
On Sun, 22 Sep 2019 21:25:18 PDT (-0700), pet...@redhat.com wrote:
The idea comes from the upstream discussion between Linus and Andrea:
https://lore.kernel.org/lkml/20171102193644.gb22...@redhat.com/
A summary to the issue: there was a special path in handle_userfault()
in the past that
On Tue, Sep 24, 2019 at 08:45:18AM -0700, Matthew Wilcox wrote:
[...]
> Oh, and while you're looking at the callers of handle_mm_fault(), a
> lot of them don't check conditions in the right order. x86, at least,
> handles FAULT_RETRY before handling FAULT_ERROR, which is clearly wrong.
>
>
On Tue, Sep 24, 2019 at 08:45:18AM -0700, Matthew Wilcox wrote:
> On Tue, Sep 24, 2019 at 11:19:08AM +0800, Peter Xu wrote:
> > On Mon, Sep 23, 2019 at 07:54:47PM -0700, Matthew Wilcox wrote:
> > > On Tue, Sep 24, 2019 at 10:47:21AM +0800, Peter Xu wrote:
> > > > On Mon, Sep 23, 2019 at 11:03:49AM
On Tue, Sep 24, 2019 at 11:19:08AM +0800, Peter Xu wrote:
> On Mon, Sep 23, 2019 at 07:54:47PM -0700, Matthew Wilcox wrote:
> > On Tue, Sep 24, 2019 at 10:47:21AM +0800, Peter Xu wrote:
> > > On Mon, Sep 23, 2019 at 11:03:49AM -0700, Linus Torvalds wrote:
> > > > On Sun, Sep 22, 2019 at 9:26 PM
On Mon, Sep 23, 2019 at 07:54:47PM -0700, Matthew Wilcox wrote:
> On Tue, Sep 24, 2019 at 10:47:21AM +0800, Peter Xu wrote:
> > On Mon, Sep 23, 2019 at 11:03:49AM -0700, Linus Torvalds wrote:
> > > On Sun, Sep 22, 2019 at 9:26 PM Peter Xu wrote:
> > > >
> > > > This patch is a preparation of
On Tue, Sep 24, 2019 at 10:47:21AM +0800, Peter Xu wrote:
> On Mon, Sep 23, 2019 at 11:03:49AM -0700, Linus Torvalds wrote:
> > On Sun, Sep 22, 2019 at 9:26 PM Peter Xu wrote:
> > >
> > > This patch is a preparation of removing that special path by allowing
> > > the page fault to return even
On Mon, Sep 23, 2019 at 11:03:49AM -0700, Linus Torvalds wrote:
> On Sun, Sep 22, 2019 at 9:26 PM Peter Xu wrote:
> >
> > This patch is a preparation of removing that special path by allowing
> > the page fault to return even faster if we were interrupted by a
> > non-fatal signal during a
On Sun, Sep 22, 2019 at 9:26 PM Peter Xu wrote:
>
> This patch is a preparation of removing that special path by allowing
> the page fault to return even faster if we were interrupted by a
> non-fatal signal during a user-mode page fault handling routine.
So I really wish saome other vm person
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