linux-kernel - Re: [PATCH] fs/proc: Move kfree outside pde_unload

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <50366E70.1020109@sgi.com>
Date:	Thu, 23 Aug 2012 12:54:56 -0500
From:	Nathan Zimmer <nzimmer@....com>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	<linux-kernel@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>,
	<adobriyan@...il.com>, Alexander Viro <viro@...iv.linux.org.uk>,
	David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH] fs/proc: Move kfree outside pde_unload_lock

On 08/22/2012 04:42 PM, Eric Dumazet wrote:
> On Wed, 2012-08-22 at 20:28 +0200, Eric Dumazet wrote:
>
>> Thats interesting, but if you really want this to fly, one RCU
>> conversion would be much better ;)
>>
>> pde_users would be an atomic_t and you would avoid the spinlock
>> contention.
> Here is what I had in mind, I would be interested to know how it helps a 512 core machine ;)
>
Thanks, I knew if I just took my time and read the rcu documentation
thoroughly that the answer would be forthcoming. ;)

Unfortunately I have to wait till tomorrow to get big box and test it.


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/