Re: fallout of 16K stacks

2014-07-07 Thread Linus Torvalds
On Mon, Jul 7, 2014 at 4:04 PM, Andi Kleen wrote: >> >> As in ENOMEM or does something worse happen? > > EAGAIN, then the workload stops. For an overnight stress > test that's pretty catastrophic. It may have killed some stuff > with the OOM killer too. I don't think it's OOM. We have long had t

Re: fallout of 16K stacks

2014-07-07 Thread Andi Kleen
On Mon, Jul 07, 2014 at 03:49:48PM -0700, H. Peter Anvin wrote: > On 07/07/2014 03:30 PM, Andi Kleen wrote: > > > > Since the 16K stack change I noticed a number of problems with > > my usual stress tests. They have a tendency to bomb out > > because something cannot fork. > > As in ENOMEM or doe

Re: fallout of 16K stacks

2014-07-07 Thread H. Peter Anvin
On 07/07/2014 03:30 PM, Andi Kleen wrote: > > Since the 16K stack change I noticed a number of problems with > my usual stress tests. They have a tendency to bomb out > because something cannot fork. As in ENOMEM or does something worse happen? > - AIM7 on a dual socket socket system now cannot

fallout of 16K stacks

2014-07-07 Thread Andi Kleen
Since the 16K stack change I noticed a number of problems with my usual stress tests. They have a tendency to bomb out because something cannot fork. - AIM7 on a dual socket socket system now cannot reliably run >1000 parallel jobs. - LTP stress + memhog stress in parallel to something else usua