linux-kernel - Re: [PATCHSET v3] slab: make memcg slab destruction scalable

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Message-ID: <20170203174346.GA26336@mtj.duckdns.org>
Date:   Fri, 3 Feb 2017 12:43:46 -0500
From:   Tejun Heo <tj@...nel.org>
To:     vdavydov.dev@...il.com, cl@...ux.com, penberg@...nel.org,
        rientjes@...gle.com, iamjoonsoo.kim@....com,
        akpm@...ux-foundation.org
Cc:     jsvana@...com, hannes@...xchg.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, cgroups@...r.kernel.org, kernel-team@...com
Subject: Re: [PATCHSET v3] slab: make memcg slab destruction scalable

Hello,

On Tue, Jan 17, 2017 at 03:54:01PM -0800, Tejun Heo wrote:
> Changes from [V2] to V3.
> 
> * 0002-slub-separate-out-sysfs_slab_release-from-sysfs_slab.patch
>   separated out from
>   0002-slab-remove-synchronous-rcu_barrier-call-in-memcg-ca.patch.
> 
> * 0002-slab-remove-synchronous-rcu_barrier-call-in-memcg-ca.patch
>   replaced with
>   0003-slab-remove-synchronous-rcu_barrier-call-in-memcg-ca.patch.
>   It now keeps rcu_barrier() in the kmem_cache destruction path.
> 
> * 0010-slab-memcg-wq.patch added to limit concurrency on destruction
>   work items.

Are there more concerns on this patchset?  If not, Andrew, can you
please route these patches?  On certain setups, this can cause serious
performance and scalability issues.

Thanks.

-- 
tejun