Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor

Rich Freeman wrote: > On Thu, Jan 4, 2018 at 8:52 PM, Jalus Bilieyich wrote: > > Is my Pentium D from 2007 affected? > > > > Any Intel x86 chip after and including the Pentium Pro should be > affected. That came out in 1995. The Pentium D is almost

Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor

On Thu, Jan 4, 2018 at 9:22 PM, R0b0t1 wrote: > > I think referring to BPF is a red herring, because it is really the > processor that is at fault. Not BPF. And yes, I'm aware of what AMD > claims. Of course the processor is at fault. However, in order to exploit the fault on

Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor

On Thu, Jan 4, 2018 at 10:18 AM, Rich Freeman wrote: > On Thu, Jan 4, 2018 at 10:44 AM, R0b0t1 wrote: >> >> I am still working through the information myself, but it looks like >> BPF filters are an easy way to make sure you have something to look >> for in

Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor

On Thu, Jan 4, 2018 at 8:52 PM, Jalus Bilieyich wrote: > Is my Pentium D from 2007 affected? > Any Intel x86 chip after and including the Pentium Pro should be affected. That came out in 1995. The Pentium D is almost certainly vulnerable. -- Rich

Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor

Is my Pentium D from 2007 affected? On 01/03/2018 09:34 PM, Adam Carter wrote: >> >> Project Zero (Google) found it; >> https://googleprojectzero.blogspot.com.au/2018/01/ >> reading-privileged-memory-with-side.html >> >> Phoronix has done some benchmarks on the impact of the kernel based >>

Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor

On Thu, Jan 4, 2018 at 10:44 AM, R0b0t1 wrote: > > I am still working through the information myself, but it looks like > BPF filters are an easy way to make sure you have something to look > for in kernelspace. My understanding is that for exploit 1 to work you need to have

Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor

On Thu, Jan 4, 2018 at 9:44 AM, R0b0t1 wrote: > But, if they do, then AMD processors are susceptible in the same way, and the issue can not be fixed. There are some news pieces and commenters claiming that AMD processors suffer similar issues.

Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor

On Thu, Jan 4, 2018 at 8:17 AM, Rich Freeman wrote: > On Thu, Jan 4, 2018 at 8:44 AM, Corbin Bird wrote: >> >> According to the Project Zero documentation having BPF JIT enabled >> is the key to the exploit. >> >> The way the docs read ... can it be

Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor

On 01/04/2018 08:17 AM, Rich Freeman wrote: > On Thu, Jan 4, 2018 at 8:44 AM, Corbin Bird wrote: >> According to the Project Zero documentation having BPF JIT enabled >> is the key to the exploit. >> >> The way the docs read ... can it be assumed that by having BPF

Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor

On Thu, Jan 4, 2018 at 8:44 AM, Corbin Bird wrote: > > According to the Project Zero documentation having BPF JIT enabled > is the key to the exploit. > > The way the docs read ... can it be assumed that by having BPF JIT > disabled on an AMD, that blocks this

Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor

On 01/03/2018 09:34 PM, Adam Carter wrote: > > Project Zero (Google) found it; > > https://googleprojectzero.blogspot.com.au/2018/01/reading-privileged-memory-with-side.html > > > > >

Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor

> > Project Zero (Google) found it; > https://googleprojectzero.blogspot.com.au/2018/01/ > reading-privileged-memory-with-side.html > > Phoronix has done some benchmarks on the impact of the kernel based > workaround ([Kernel] Page Table Isolation (PSI) nee Kaiser) >

Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor

On Thu, Jan 4, 2018 at 2:15 PM, P Levine wrote: > I'm not sure if it's been mentioned here before but there apparently is a > bug affecting all Intel CPUs manufactured in the last 10 years or so, in > which protected kernel memory is leaked to userspace. It can't be

[gentoo-user] Expect a ~15% average slowdown if you use an Intel processor

I'm not sure if it's been mentioned here before but there apparently is a bug affecting all Intel CPUs manufactured in the last 10 years or so, in which protected kernel memory is leaked to userspace. It can't be patched in microcode and will lead to some serious overhead to patch in the OS. See,