Re: strace lockup when tracing exec in go

2016-09-22 Thread Aleksa Sarai
> This patch doesn't help, nor does the previous patch... but with both > applied, all is well. All you have to do now is figure out why :) Ohh, I should be more explicit, this needs the mm_access part as well. Sorry for not being clear enough. So the full change is >>> >>>

Re: strace lockup when tracing exec in go

2016-09-22 Thread Michal Hocko
On Thu 22-09-16 06:15:02, Mike Galbraith wrote: [...] > master.today... Thanks for trying to reproduce this. My tiny laptop (2 cores, 2 threads per core) cannot reproduce even in 10 minutes or so. I've tried to use the same machine I was testing with 3.12 kernel (2 sockets, 8 cores per soc. and 2

Re: strace lockup when tracing exec in go

2016-09-22 Thread Michal Hocko
On Thu 22-09-16 10:01:26, Michal Hocko wrote: > On Thu 22-09-16 06:15:02, Mike Galbraith wrote: > [...] > > master.today... > > Thanks for trying to reproduce this. My tiny laptop (2 cores, 2 threads > per core) cannot reproduce even in 10 minutes or so. I've tried to use > the same machine I was

Re: strace lockup when tracing exec in go

2016-09-22 Thread Mike Galbraith
On Thu, 2016-09-22 at 11:53 +0200, Michal Hocko wrote: > On Thu 22-09-16 11:40:09, Mike Galbraith wrote: > > This patch doesn't help, nor does the previous patch... but with both > > applied, all is well. All you have to do now is figure out why :) > > Ohh, I should be more explicit, this needs

Re: strace lockup when tracing exec in go

2016-09-22 Thread Mike Galbraith
On Wed, 2016-09-21 at 17:29 +0200, Michal Hocko wrote: > [I am CCing strace mailing list because even if this turns out to be a > kernel bug strace seems to be doing something unexpected - more on that > below] > > Hi, > Aleksa has reported the following lockup when stracing the following go >

Re: strace lockup when tracing exec in go

2016-09-22 Thread Michal Hocko
On Thu 22-09-16 11:40:09, Mike Galbraith wrote: > On Thu, 2016-09-22 at 10:36 +0200, Michal Hocko wrote: > > On Thu 22-09-16 10:01:26, Michal Hocko wrote: > > > On Thu 22-09-16 06:15:02, Mike Galbraith wrote: > > > [...] > > > > master.today... > > > > > > Thanks for trying to reproduce this. My

Re: strace lockup when tracing exec in go

2016-09-22 Thread Mike Galbraith
On Thu, 2016-09-22 at 10:36 +0200, Michal Hocko wrote: > On Thu 22-09-16 10:01:26, Michal Hocko wrote: > > On Thu 22-09-16 06:15:02, Mike Galbraith wrote: > > [...] > > > master.today... > > > > Thanks for trying to reproduce this. My tiny laptop (2 cores, 2 threads > > per core) cannot reproduce

Re: strace lockup when tracing exec in go

2016-09-22 Thread Michal Hocko
On Thu 22-09-16 12:09:05, Mike Galbraith wrote: > On Thu, 2016-09-22 at 11:53 +0200, Michal Hocko wrote: > > On Thu 22-09-16 11:40:09, Mike Galbraith wrote: > > > > This patch doesn't help, nor does the previous patch... but with both > > > applied, all is well. All you have to do now is figure

Re: strace lockup when tracing exec in go

2016-09-22 Thread Michal Hocko
On Thu 22-09-16 13:09:25, Michal Hocko wrote: > On Thu 22-09-16 12:09:05, Mike Galbraith wrote: > > On Thu, 2016-09-22 at 11:53 +0200, Michal Hocko wrote: > > > On Thu 22-09-16 11:40:09, Mike Galbraith wrote: > > > > > > This patch doesn't help, nor does the previous patch... but with both > > >