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SubjectRe: [patch 3/3] vmstat: Create our own workqueue
Hello,

That's weird.

On Wed, Oct 28, 2015 at 08:57:28PM +0900, Tetsuo Handa wrote:
> [ 272.851035] Showing busy workqueues and worker pools:
> [ 272.852583] workqueue events: flags=0x0
> [ 272.853942] pwq 6: cpus=3 node=0 flags=0x0 nice=0 active=1/256
> [ 272.855781] pending: vmw_fb_dirty_flush [vmwgfx]
> [ 272.857500] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
> [ 272.859359] pending: vmpressure_work_fn
> [ 272.860840] workqueue events_freezable_power_: flags=0x84
> [ 272.862461] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256
> [ 272.864479] in-flight: 11286:disk_events_workfn

What's this guy doing? Can you get stack dump on 11286 (or whatever
is in flight in the next lockup)?

> [ 272.866065] pending: disk_events_workfn
> [ 272.867587] workqueue vmstat: flags=0x8
> [ 272.868942] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
> [ 272.870785] pending: vmstat_update
> [ 272.872248] pool 2: cpus=1 node=0 flags=0x0 nice=0 workers=4 idle: 14 218 43

Thanks.

--
tejun


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