Messages in this thread | | | Date | Tue, 31 Mar 2015 14:32:12 -0400 | From | Chris Metcalf <> | Subject | Re: [PATCH] watchdog: nohz: don't run watchdog on nohz_full cores |
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On 03/30/2015 10:04 PM, Mike Galbraith wrote: > On Mon, Mar 30, 2015 at 02:51:05PM -0400, cmetcalf@ezchip.com wrote: >> From: Chris Metcalf <cmetcalf@ezchip.com> >> >> Running watchdog can be a helpful debugging feature on regular >> cores, but it's incompatible with nohz_full, since it forces >> regular scheduling events. Accordingly, just exit out immediately >> from any nohz_full core. > Hm, I don't see why this is needed, for debugging/testing you turn it > on, when you set up for critical operation, you turn it off.
It can be helpful to keep the watchdog running even in production to help diagnose hard-to-reproduce failures. You just can't have it running on the nohz_full cores.
-- Chris Metcalf, EZChip Semiconductor http://www.ezchip.com
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