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, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>