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Date:   Tue, 26 Mar 2019 14:36:04 +0100
From:   Oleg Nesterov <>
To:     Christopher Lameter <>
Cc:     Matthew Wilcox <>,
        Waiman Long <>,
        Andrew Morton <>,
        Pekka Enberg <>,
        David Rientjes <>,
        Joonsoo Kim <>,,,, Paul Moore <>,
        Stephen Smalley <>,
        Eric Paris <>,
        "Peter Zijlstra (Intel)" <>
Subject: Re: [PATCH 2/4] signal: Make flush_sigqueue() use free_q to release

On 03/25, Christopher Lameter wrote:
> On Fri, 22 Mar 2019, Matthew Wilcox wrote:
> > Only for SLAB and SLUB.  SLOB requires that you pass a pointer to the
> > slab cache; it has no way to look up the slab cache from the object.
> Well then we could either fix SLOB to conform to the others or add a
> kmem_cache_free_rcu() variant.

Speaking of struct sigqueue we can simply use call_rcu() but see my previous
email, I am not sure this is the best option.


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