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

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To: Sergey Senozhatsky <sergey.senozhatsky.work@xxxxxxxxx>
Subject: Re: [PATCH] zsmalloc: fix migrate_zspage-zs_free race condition
From: Russell Knize <rknize@xxxxxxxxxxxx>
Date: Tue, 19 Jan 2016 09:47:12 -0600
Cc: Minchan Kim <minchan@xxxxxxxxxx>, Junil Lee <junil0814.lee@xxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, ngupta@xxxxxxxxxx, linux-mm@xxxxxxxxx, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>
Delivered-to: linux-mm-outgoing@xxxxxxxxx
In-reply-to: <20160115050722.GE1993@swordfish>

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

Follow-Ups:
- Re: [PATCH] zsmalloc: fix migrate_zspage-zs_free race condition
  - From: Minchan Kim

References:
- [PATCH] zsmalloc: fix migrate_zspage-zs_free race condition
  - From: Junil Lee
- Re: [PATCH] zsmalloc: fix migrate_zspage-zs_free race condition
  - From: Minchan Kim
- Re: [PATCH] zsmalloc: fix migrate_zspage-zs_free race condition
  - From: Sergey Senozhatsky
- Re: [PATCH] zsmalloc: fix migrate_zspage-zs_free race condition
  - From: Minchan Kim
- Re: [PATCH] zsmalloc: fix migrate_zspage-zs_free race condition
  - From: Sergey Senozhatsky

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