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Re: [PATCH 4.1 125/159] net: call rcu_read_lock early in process_backlog

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On 09/29/2015 12:48 PM, Andre Tomt wrote:
> On 29. sep. 2015 12:21, Andre Tomt wrote:
>> Meanwhile I'll revert both the mentioned net patches and see how it goes.
> 
> So that blew up as well, meaning it's not any of these two patches:
> [PATCH 4.1 124/159] net: do not process device backlog during unregistration
> [PATCH 4.1 125/159] net: call rcu_read_lock early in process_backlog
> 
> I'll be offline for a half+ day, I'll look into bisecting when back if
> nobody has figured it out by then.

After I noticed your crash I did ran some tests with 4.1.9 on physical
host (old core2duo) with kvm guest..

nfs client/server between guest/host + X on guest, next kvm guest to
force host to swap some memory to create memory pressure and all this
with 'perf top' on host machine without any problems..

HTH, Z.
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[PATCH 4.1 125/159] net: call rcu_read_lock early in process_backlog Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-09-26 23:40 +0200
  Re: [PATCH 4.1 125/159] net: call rcu_read_lock early in  process_backlog "Andre Tomt (LKML)" <lkml@tomt.net> - 2015-09-29 04:20 +0200
    Re: [PATCH 4.1 125/159] net: call rcu_read_lock early in  process_backlog Julian Anastasov <ja@ssi.bg> - 2015-09-29 09:50 +0200
      Re: [PATCH 4.1 125/159] net: call rcu_read_lock early in  process_backlog Andre Tomt <andre@tomt.net> - 2015-09-29 12:50 +0200
        Re: [PATCH 4.1 125/159] net: call rcu_read_lock early in  process_backlog Zdenek Kaspar <zkaspar82@gmail.com> - 2015-09-30 02:30 +0200
        kernel 4.1.9: networking hangs with rcu_preempt self-detected stall, 4.1.8 works; was: Re: [PATCH 4.1 125/159] net: call rcu_read_lock early in process_backlog Wolfgang Walter <linux@stwm.de> - 2015-10-01 13:40 +0200
          Re: kernel 4.1.9: networking hangs with rcu_preempt self-detected  stall, 4.1.8 works; was: Re: [PATCH 4.1 125/159] net: call rcu_read_lock  early in process_backlog Holger Hoffstätte   <holger.hoffstaette@googlemail.com> - 2015-10-01 13:50 +0200
      Re: [PATCH 4.1 125/159] net: call rcu_read_lock early in  process_backlog Julian Anastasov <ja@ssi.bg> - 2015-09-29 21:30 +0200

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