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Date: Wed, 11 Jun 2014 16:14:43 -0500 From: Dave Chiluk <chiluk@...onical.com> To: "Eric W. Biederman" <ebiederm@...ssion.com> CC: paulmck@...ux.vnet.ibm.com, Rafael Tinoco <rafael.tinoco@...onical.com>, linux-kernel@...r.kernel.org, davem@...emloft.net, Christopher Arges <chris.j.arges@...onical.com>, Jay Vosburgh <jay.vosburgh@...onical.com> Subject: Re: Possible netns creation and execution performance/scalability regression since v3.8 due to rcu callbacks being offloaded to multiple cpus On 06/11/2014 03:46 PM, Eric W. Biederman wrote: > ip netns add also performs a bind mount so we get into all of the vfs > level locking as well. It's actually quite a bit worse than that as ip netns exec creates a new mount namespace as well. That being said, the vfs issues have been healthily mitigated by a number of recent patches by Al Viro to fs/namespace.c. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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