Re: [PATCH 2/4] signal: Make flush_sigqueue() use free_q to release memory

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To: Waiman Long <longman@xxxxxxxxxx>
Subject: Re: [PATCH 2/4] signal: Make flush_sigqueue() use free_q to release memory
From: Christopher Lameter <cl@xxxxxxxxx>
Date: Fri, 22 Mar 2019 17:50:20 +0000
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Pekka Enberg <penberg@xxxxxxxxxx>, David Rientjes <rientjes@xxxxxxxxxx>, Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, selinux@xxxxxxxxxxxxxxx, Paul Moore <paul@xxxxxxxxxxxxxx>, Stephen Smalley <sds@xxxxxxxxxxxxx>, Eric Paris <eparis@xxxxxxxxxxxxxx>, "Peter Zijlstra (Intel)" <peterz@xxxxxxxxxxxxx>
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In-reply-to: <d9e02cc4-3162-57b0-7924-9642aecb8f49@redhat.com>
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On Fri, 22 Mar 2019, Waiman Long wrote:

> I am looking forward to it.

There is also alrady rcu being used in these paths. kfree_rcu() would not
be enough? It is an estalished mechanism that is mature and well
understood.

Follow-Ups:
- Re: [PATCH 2/4] signal: Make flush_sigqueue() use free_q to release memory
  - From: Oleg Nesterov
- Re: [PATCH 2/4] signal: Make flush_sigqueue() use free_q to release memory
  - From: Waiman Long

References:
- [PATCH 0/4] Signal: Fix hard lockup problem in flush_sigqueue()
  - From: Waiman Long
- [PATCH 2/4] signal: Make flush_sigqueue() use free_q to release memory
  - From: Waiman Long
- Re: [PATCH 2/4] signal: Make flush_sigqueue() use free_q to release memory
  - From: Matthew Wilcox
- Re: [PATCH 2/4] signal: Make flush_sigqueue() use free_q to release memory
  - From: Oleg Nesterov
- Re: [PATCH 2/4] signal: Make flush_sigqueue() use free_q to release memory
  - From: Waiman Long

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