From: Michael Ellerman <michael@ellerman.id.au>
To: Anton Blanchard <anton@samba.org>
Cc: paulmck@linux.vnet.ibm.com, paulus@samba.org,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH] powerpc: Make 64-bit non-VMX __copy_tofrom_user bi-endian
Date: Tue, 24 Dec 2013 14:34:53 +1100 [thread overview]
Message-ID: <1387856093.15093.3.camel@concordia> (raw)
In-Reply-To: <20131224120259.454bc44c@kryten>
On Tue, 2013-12-24 at 12:02 +1100, Anton Blanchard wrote:
> Hi Michael,
>
> > > To try and catch any screw ups in our ppc64 memcpy and
> > > copy_tofrom_user loops, I wrote a quick test:
> > >
> > > http://ozlabs.org/~anton/junkcode/validate_kernel_copyloops.tar.gz
> >
> > Nice! How's this look?
>
> Love it!
Cool, I'll add your Signed-off-by and resubmit.
> At the moment my other copy_to/from_user tests run against the kernel
> (testing we copy all data right up to a page fault and that we return
> the correct number of bytes not copied etc). A small signal handler
> that walks the exception entries and branches to the handler should be
> all it takes to do it completely in userspace.
That'd be nice. Are they in your junkcode? I couldn't spot them at a glance.
cheers
prev parent reply other threads:[~2013-12-24 3:34 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-17 22:29 [PATCH] powerpc: Make 64-bit non-VMX __copy_tofrom_user bi-endian Anton Blanchard
2013-12-18 10:15 ` Anton Blanchard
2013-12-19 13:17 ` Michael Ellerman
2013-12-24 1:02 ` Anton Blanchard
2013-12-24 3:34 ` Michael Ellerman [this message]
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