linux-kernel - Re: [PATCH 1/2] lib: more scalable list

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Date:	Sun, 24 Jan 2010 21:59:06 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Dave Chinner <david@...morbit.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Don Mullis <don.mullis@...il.com>,
	linux-kernel@...r.kernel.org, airlied@...hat.com,
	dedekind@...radead.org
Subject: Re: [PATCH 1/2] lib: more scalable list_sort()

> Similarly, adding cond_resched() to list_sort means you can stop
> worrying about the scheduling latency impact of sorting long lists.
> I fail to see why you're making such a big deal out of this.....

It's not easy to add it to a low level library function like list_sort()
because you would need to ensure that all callers are allowed to sleep.

Or even if all callers currently allow it future ones might not.

So it would need a new flag or so if needed, completely changing 
the interface.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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