Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is enabled

From	Tejun Heo <tj@kernel.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is enabled
Date	2015-08-31 15:50 +0200
Message-ID	<q3xDb-RS-11@gated-at.bofh.it> (permalink)
References	<q3g9j-17i-3@gated-at.bofh.it> <q3xjQ-v6-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Hello,

On Mon, Aug 31, 2015 at 03:24:15PM +0200, Michal Hocko wrote:
> Right but isn't that what the caller explicitly asked for? Why should we
> ignore that for kmem accounting? It seems like a fix at a wrong layer to
> me. Either we should start failing GFP_NOWAIT charges when we are above
> high wmark or deploy an additional catchup mechanism as suggested by
> Tejun. I like the later more because it allows to better handle GFP_NOFS
> requests as well and there are many sources of these from kmem paths.

Yeah, this is beginning to look like we're trying to solve the problem
at the wrong layer.  slab/slub or whatever else should be able to use
GFP_NOWAIT in whatever frequency they want for speculative
allocations.

Thanks.

-- 
tejun
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Thread

[PATCH 0/2] Fix memcg/memory.high in case kmem accounting is enabled Vladimir Davydov <vdavydov@parallels.com> - 2015-08-30 21:10 +0200
  [PATCH 2/2] mm/slub: do not bypass memcg reclaim for high-order page allocation Vladimir Davydov <vdavydov@parallels.com> - 2015-08-30 21:10 +0200
  [PATCH 1/2] mm/slab: skip memcg reclaim only if in atomic context Vladimir Davydov <vdavydov@parallels.com> - 2015-08-30 21:10 +0200
  Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Michal Hocko <mhocko@kernel.org> - 2015-08-31 15:30 +0200
    Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Tejun Heo <tj@kernel.org> - 2015-08-31 15:50 +0200
      Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Tejun Heo <tj@kernel.org> - 2015-08-31 16:40 +0200
        Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Vladimir Davydov <vdavydov@parallels.com> - 2015-08-31 17:20 +0200
          Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Tejun Heo <tj@kernel.org> - 2015-08-31 17:50 +0200
            Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Vladimir Davydov <vdavydov@parallels.com> - 2015-08-31 19:00 +0200
              Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Tejun Heo <tj@kernel.org> - 2015-08-31 19:10 +0200
                Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Vladimir Davydov <vdavydov@parallels.com> - 2015-08-31 21:30 +0200
                Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Christoph Lameter <cl@linux.com> - 2015-08-31 22:30 +0200
                Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Vladimir Davydov <vdavydov@parallels.com> - 2015-09-01 11:30 +0200
      Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Vladimir Davydov <vdavydov@parallels.com> - 2015-08-31 16:40 +0200
    Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Vladimir Davydov <vdavydov@parallels.com> - 2015-08-31 16:30 +0200
      Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Tejun Heo <tj@kernel.org> - 2015-08-31 16:50 +0200
        Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Vladimir Davydov <vdavydov@parallels.com> - 2015-08-31 17:30 +0200
      Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Michal Hocko <mhocko@kernel.org> - 2015-09-01 14:40 +0200
        Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Vladimir Davydov <vdavydov@parallels.com> - 2015-09-01 15:50 +0200
          Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Michal Hocko <mhocko@kernel.org> - 2015-09-01 17:10 +0200
            Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Vladimir Davydov <vdavydov@parallels.com> - 2015-09-01 19:00 +0200
              Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Michal Hocko <mhocko@kernel.org> - 2015-09-01 20:40 +0200
                Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Vladimir Davydov <vdavydov@parallels.com> - 2015-09-02 11:40 +0200
                Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Christoph Lameter <cl@linux.com> - 2015-09-02 20:20 +0200
                Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Vladimir Davydov <vdavydov@parallels.com> - 2015-09-03 11:40 +0200
                Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Tejun Heo <tj@kernel.org> - 2015-09-03 18:40 +0200
                Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Vladimir Davydov <vdavydov@parallels.com> - 2015-09-04 13:20 +0200
                Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Tejun Heo <tj@kernel.org> - 2015-09-04 17:50 +0200
                Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Vladimir Davydov <vdavydov@parallels.com> - 2015-09-04 20:30 +0200
                Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Tejun Heo <tj@kernel.org> - 2015-09-04 21:40 +0200
                Re: [PATCH 0/2] Fix memcg/memory.high in case kmem accounting is  enabled Michal Hocko <mhocko@kernel.org> - 2015-09-04 16:40 +0200

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