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

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Date:	Tue, 01 Aug 2006 15:35:13 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Christoph Lameter <clameter@....com>
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, 2006-08-01 at 12:10 -0700, Christoph Lameter wrote:
> On Tue, 1 Aug 2006, Steven Rostedt wrote:
> 
> > If you set the alignment for ext3 the same as the size (ie 1024, 2048,
> > 4096 for the above respectively) then wouldn't that guarantee not
> > straddling a page?
> 
> 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?

-- Steve


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