Re: [PATCH] zsmalloc: fix migrate_zspage-zs_free race condition

[Minchan Kim]

Hello Russ,

On Tue, Jan 19, 2016 at 09:47:12AM -0600, Russell Knize wrote:
>    Just wanted to ack this, as we have been seeing the same problem (weird
>    race conditions during compaction) and fixed it in the same way a few
>    weeks ago (resetting the pin bit before recording the obj).
>    Russ

First of all, thanks for your comment.

The patch you tested have a problem although it's really subtle(ie,
it doesn't do store tearing when I disassemble ARM{32|64}) but it
could have a problem potentially for other architecutres or future ARM.
For right fix, I sent v5 - https://lkml.org/lkml/2016/1/18/263.
If you can prove it fixes your problem, please Tested-by to the thread.
It's really valuable to do testing for stable material.

Thanks!