linux-kernel - Re: [patch] aio: streamline read events after woken up

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Message-Id: <0B3B0231-4AFD-4870-B96F-00AC78F80E52@oracle.com>
Date:	Tue, 2 Jan 2007 17:05:33 -0800
From:	Zach Brown <zach.brown@...cle.com>
To:	"Chen, Kenneth W" <kenneth.w.chen@...el.com>
Cc:	"'Andrew Morton'" <akpm@...l.org>, <linux-aio@...ck.org>,
	<linux-kernel@...r.kernel.org>,
	"'Benjamin LaHaise'" <bcrl@...ck.org>, <suparna@...ibm.com>
Subject: Re: [patch] aio: streamline read events after woken up

> Given the previous patch "aio: add per task aio wait event condition"
> that we properly wake up event waiting process knowing that we have
> enough events to reap, it's just plain waste of time to insert itself
> into a wait queue, and then immediately remove itself from the wait
> queue for *every* event reap iteration.

Hmm, I dunno.  It seems like we're still left with a pretty silly loop.

Would it be reasonable to have a loop that copied multiple events at  
a time?  We could use some __copy_to_user_inatomic(), it didn't exist  
when this stuff was first written.

- z
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