Re: [PATCH] procfs: Improve Scaling in proc

2012-10-18 Thread Nathan Zimmer
On 10/18/2012 02:46 AM, Eric Dumazet wrote: On Wed, 2012-10-17 at 15:25 -0500, Nathan Zimmer wrote: I am currently tracking a hotlock reported by a customer on a large, 512 cores, system, I am currently running 3.7.0 rc1 but the issue looks like it has been this way for a very long time. The off

Re: [PATCH] procfs: Improve Scaling in proc

2012-10-18 Thread Eric Dumazet
On Wed, 2012-10-17 at 15:25 -0500, Nathan Zimmer wrote: > I am currently tracking a hotlock reported by a customer on a large, 512 > cores, > system, I am currently running 3.7.0 rc1 but the issue looks like it has been > this way for a very long time. > The offending lock is proc_dir_entry->pde_u

[PATCH] procfs: Improve Scaling in proc

2012-10-17 Thread Nathan Zimmer
I am currently tracking a hotlock reported by a customer on a large, 512 cores, system, I am currently running 3.7.0 rc1 but the issue looks like it has been this way for a very long time. The offending lock is proc_dir_entry->pde_unload_lock. This patch converts the replaces the lock with the rcu