Re: [HMM 12/15] mm/migrate: new memory migration helper for use with device memory v4

From: Evgeny Baskakov
Date: Tue Jul 11 2017 - 15:35:39 EST

On 7/11/17 11:49 AM, Jerome Glisse wrote:

What are the symptoms ? The program just stop making any progress and you
trigger a sysrequest to dump current states of each threads ? In this
log i don't see migration_entry_wait() anymore but it seems to be waiting
on page lock so there might be 2 issues here.


That is correct, the program is not making any progress.

The stack traces in the kernel log are produced by a "sysrq w" (blocked tasks) command.


Evgeny Baskakov