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

Zdenek Kaspar
2015-09-30T00:26:04Z

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.