Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date: Wed, 3 Jan 2018 13:57:55 +0000
From: Ard Biesheuvel <>
To: Jinbum Park <>
Cc: Dave Martin <>,, 
	LKML <>, 
	Kernel Hardening <>, Russell King <>, 
	Will Deacon <>, Peter Zijlstra <>,, 
	Ingo Molnar <>, Mark Rutland <>, 
	Nicolas Pitre <>,, 
	Kees Cook <>, Laura Abbott <>
Subject: Re: [PATCH] arm: kernel: implement fast refcount checking

On 3 January 2018 at 13:36, Jinbum Park <> wrote:
>>> This is a nice result. However, without any insight into the presence
>>> of actual refcount hot spots, it is not obvious that we need this
>>> patch. This is the reason we ended up enabling CONFIG_REFCOUNT_FULL
>>> for arm64. I will let others comment on whether we want this patch in
>>> the first place,
> Dear Ard, Dave,
> I wanna hear some comment on above point.
> Is CONFIG_REFCOUNT_FULL much better for arm?
> If it is, I don't need to prepare v2 patch. (then, just needed to add
> "select REFCOUNT_FULL")

Well, we should probably turn that around. Please use REFCOUNT_FULL,
until you run into a use case where the slowdown is noticeable. If
nobody ever notices, we don't need to fix anything.

Powered by blists - more mailing lists

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.