linux-kernel - Re: [BLOCK] bh: Ensure bh fits within a page

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Message-ID: <Pine.LNX.4.64.0608011254270.18917@schroedinger.engr.sgi.com>
Date:	Tue, 1 Aug 2006 12:55:29 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Steven Rostedt <rostedt@...dmis.org>
cc:	Andrew Morton <akpm@...l.org>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	linux-kernel@...r.kernel.org, ext2-devel@...ts.sourceforge.net
Subject: Re: [BLOCK] bh: Ensure bh fits within a page

On Tue, 1 Aug 2006, Steven Rostedt wrote:

> > Yes. But then that number must always be a fraction of pagesize.
> > 
> 
> understood, as is 1024, 2048, and 4096 are.  Well, if pagesize is 4096
> is 4096 really a fraction of 4096? :)
> 
> Also, isn't all sizes for kmalloc that are under pagesize a fraction of
> the page size? Or more correctly, a power of 2?

Well the size of the object and the alignment must be a fraction of the 
pagesize. If you get page aligned pages then I wonder why use the slab 
allocator? The page allocator will be much better suited.

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