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Date: Sat, 23 Jan 2016 17:21:55 +0100 From: Mike Galbraith <umgwanakikbuti@...il.com> To: Christoph Lameter <cl@...ux.com> Cc: Peter Zijlstra <peterz@...radead.org>, LKML <linux-kernel@...r.kernel.org> Subject: fast path cycle muncher (vmstat: make vmstat_updater deferrable again and shut down on idle) Hi Christoph, While you're fixing that commit up, can you perhaps find a better home for quiet_vmstat()? It not only munches cycles when switching cross -core mightily, for -rt it injects a sleeping lock into the idle task. 12.89% [kernel] [k] refresh_cpu_vm_stats.isra.12 4.75% [kernel] [k] __schedule 4.70% [kernel] [k] mutex_unlock 3.14% [kernel] [k] __switch_to -Mike
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