Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1411558

Re: [PATCH v7 00/12] Support non-lru page migration

Show all headers | View raw

On Wed,  1 Jun 2016 08:21:09 +0900 Minchan Kim <minchan@kernel.org> wrote:

> Recently, I got many reports about perfermance degradation in embedded
> system(Android mobile phone, webOS TV and so on) and easy fork fail.
> 
> The problem was fragmentation caused by zram and GPU driver mainly.
> With memory pressure, their pages were spread out all of pageblock and
> it cannot be migrated with current compaction algorithm which supports
> only LRU pages. In the end, compaction cannot work well so reclaimer
> shrinks all of working set pages. It made system very slow and even to
> fail to fork easily which requires order-[2 or 3] allocations.
> 
> Other pain point is that they cannot use CMA memory space so when OOM
> kill happens, I can see many free pages in CMA area, which is not
> memory efficient. In our product which has big CMA memory, it reclaims
> zones too exccessively to allocate GPU and zram page although there are
> lots of free space in CMA so system becomes very slow easily.

But this isn't presently implemented for GPU drivers or for CMA, yes?

What's the story there?

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH v7 00/12] Support non-lru page migration Minchan Kim <minchan@kernel.org> - 2016-06-01 01:30 +0200
  [PATCH v7 10/12] zsmalloc: use freeobj for index Minchan Kim <minchan@kernel.org> - 2016-06-01 01:30 +0200
  [PATCH v7 02/12] mm: migrate: support non-lru movable page migration Minchan Kim <minchan@kernel.org> - 2016-06-01 01:30 +0200
  [PATCH v7 03/12] mm: balloon: use general non-lru movable page feature Minchan Kim <minchan@kernel.org> - 2016-06-01 01:30 +0200
  Re: [PATCH v7 00/12] Support non-lru page migration Andrew Morton <akpm@linux-foundation.org> - 2016-06-01 23:50 +0200
    Re: [PATCH v7 00/12] Support non-lru page migration Daniel Vetter <daniel@ffwll.ch> - 2016-06-02 00:50 +0200
    Re: [PATCH v7 00/12] Support non-lru page migration Minchan Kim <minchan@kernel.org> - 2016-06-02 02:40 +0200

csiph-web