linux-kernel - Re: Can context switches be faster?

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Date:	Thu, 12 Oct 2006 14:20:31 -0400
From:	Phillip Susi <psusi@....rr.com>
To:	John Richard Moser <nigelenki@...cast.net>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Can context switches be faster?

John Richard Moser wrote:
> Can context switches be made faster?  This is a simple question, mainly
> because I don't really understand what happens during a context switch
> that the kernel has control over (besides storing registers).
> 

Besides saving the registers, the expensive operation in a context 
switch involves flushing caches and switching page tables.  This can be 
avoided if the new and old processes both share the same address space.

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