Date: Sun, 11 Dec 2005 21:05:35 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Ed Tomlinson <edt@aei.ca>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org,
       Matt Mackall <mpm@selenic.com>
Subject: Re: [patch -mm] fix SLOB on x64
Message-ID: <20051211200535.GB19322@elte.hu>
References: <20051211141217.GA5912@elte.hu> <200512111222.56067.edt@aei.ca>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <200512111222.56067.edt@aei.ca>
User-Agent: Mutt/1.4.2.1i
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1082
Lines: 25


* Ed Tomlinson <edt@aei.ca> wrote:

> On Sunday 11 December 2005 09:12, Ingo Molnar wrote:
> > this patch fixes 32-bitness bugs in mm/slob.c. Successfully booted x64 
> > with SLOB enabled. (i have switched the PREEMPT_RT feature to use the 
> > SLOB allocator exclusively, so it must work on all platforms)
> 
> Its a good idea to get this working everywhere.  Why have you switched 
> to use SLOB exclusively?

because the SLAB hacks were getting ugly, and i gave up on it during the 
2.6.15-rc5 merge. (The SLAB code has lots of irqs-off / per-cpu and 
non-preempt assumptions integrated, which were a pain to sort out.)

We'll eventually do a cleaner conversion of SLAB to PREEMPT_RT, but for 
now the SLOB is turned on exclusively if PREEMPT_RT. (in other 
preemption modes it's optionally selectable if EMBEDDED is enabled)

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