On Mon, 2018-07-23 at 09:29 +0200, Joerg Roedel wrote:
> Hey David,
>
> On Sun, Jul 22, 2018 at 11:49:00PM -0400, David H. Gutteridge wrote:
> > Unfortunately, I can trigger a bug in KVM+QEMU with the Bochs VGA
> > driver. (This is the same VM definition I shared with you in a PM
> > back on Feb.
On Mon 2018-07-23 14:50:50, Andy Lutomirski wrote:
>
>
> > On Jul 23, 2018, at 2:38 PM, Pavel Machek wrote:
> >
> >> On Mon 2018-07-23 12:00:08, Linus Torvalds wrote:
> >>> On Mon, Jul 23, 2018 at 7:09 AM Pavel Machek wrote:
> >>>
> >>> Meanwhile... it looks like gcc is not slowed down signif
> On Jul 24, 2018, at 6:39 AM, Pavel Machek wrote:
>
>> On Mon 2018-07-23 12:00:08, Linus Torvalds wrote:
>>> On Mon, Jul 23, 2018 at 7:09 AM Pavel Machek wrote:
>>>
>>> Meanwhile... it looks like gcc is not slowed down significantly, but
>>> other stuff sees 30% .. 40% slowdowns... which is
On Mon 2018-07-23 12:00:08, Linus Torvalds wrote:
> On Mon, Jul 23, 2018 at 7:09 AM Pavel Machek wrote:
> >
> > Meanwhile... it looks like gcc is not slowed down significantly, but
> > other stuff sees 30% .. 40% slowdowns... which is rather
> > significant.
>
> That is more or less expected.
Ok
On 07/23/2018 02:59 PM, Josh Poimboeuf wrote:
> On Mon, Jul 23, 2018 at 11:38:30PM +0200, Pavel Machek wrote:
>> But for now I'd like at least "global" option of turning pti on/off
>> during runtime for benchmarking. Let me see...
>>
>> Something like this, or is it going to be way more complex? Do
On Mon, Jul 23, 2018 at 11:38:30PM +0200, Pavel Machek wrote:
> But for now I'd like at least "global" option of turning pti on/off
> during runtime for benchmarking. Let me see...
>
> Something like this, or is it going to be way more complex? Does
> anyone have patch by chance?
RHEL/CentOS has
Hi!
> > What I want is "if A can ptrace B, and B has pti disabled, A can have
> > pti disabled as well". Now.. I see someone may want to have it
> > per-thread, because for stuff like javascript JIT, thread may have
> > rights to call ptrace, but is unable to call ptrace because JIT
> > removed th
> On Jul 23, 2018, at 2:38 PM, Pavel Machek wrote:
>
>> On Mon 2018-07-23 12:00:08, Linus Torvalds wrote:
>>> On Mon, Jul 23, 2018 at 7:09 AM Pavel Machek wrote:
>>>
>>> Meanwhile... it looks like gcc is not slowed down significantly, but
>>> other stuff sees 30% .. 40% slowdowns... which is
On Mon 2018-07-23 12:00:08, Linus Torvalds wrote:
> On Mon, Jul 23, 2018 at 7:09 AM Pavel Machek wrote:
> >
> > Meanwhile... it looks like gcc is not slowed down significantly, but
> > other stuff sees 30% .. 40% slowdowns... which is rather
> > significant.
>
> That is more or less expected.
>
On Mon, Jul 23, 2018 at 7:09 AM Pavel Machek wrote:
>
> Meanwhile... it looks like gcc is not slowed down significantly, but
> other stuff sees 30% .. 40% slowdowns... which is rather
> significant.
That is more or less expected.
Gcc spends about 90+% of its time in user space, and the system ca
Hi!
> here are 3 patches which update the PTI-x86-32 patches recently merged
> into the tip-tree. The patches are ordered by importance:
It seems PTI is now in -next. I'll test that soon.
Meanwhile... it looks like gcc is not slowed down significantly, but
other stuff sees 30% .. 40% slowdowns..
Hey David,
On Sun, Jul 22, 2018 at 11:49:00PM -0400, David H. Gutteridge wrote:
> Unfortunately, I can trigger a bug in KVM+QEMU with the Bochs VGA
> driver. (This is the same VM definition I shared with you in a PM
> back on Feb. 20th, except note that 4.18 kernels won't successfully
> boot with
On Fri, 2018-07-20 at 18:22 +0200, Joerg Roedel wrote:
> Hi,
>
> here are 3 patches which update the PTI-x86-32 patches recently merged
> into the tip-tree. The patches are ordered by importance:
>
> Patch 1: Very important, it fixes a vmalloc-fault in NMI context
>when PTI
Hi,
here are 3 patches which update the PTI-x86-32 patches recently merged
into the tip-tree. The patches are ordered by importance:
Patch 1: Very important, it fixes a vmalloc-fault in NMI context
when PTI is enabled. This is pretty unlikely to hit
when
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