Re: [patch 3/3] vmstat: Create our own workqueue

[Tejun Heo]

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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/