linux-kernel - Re: [PATCH 06/10] AXFS: axfs

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Message-ID: <6934efce0808212005h30fa16d8w48833e8a0becfd8c@mail.gmail.com>
Date:	Thu, 21 Aug 2008 20:05:48 -0700
From:	"Jared Hulbert" <jaredeh@...il.com>
To:	"Phillip Lougher" <phillip@...gher.demon.co.uk>
Cc:	Linux-kernel@...r.kernel.org, linux-embedded@...r.kernel.org,
	linux-mtd <linux-mtd@...ts.infradead.org>,
	"Jörn Engel" <joern@...fs.org>,
	tim.bird@...sony.com, cotte@...ibm.com, nickpiggin@...oo.com.au
Subject: Re: [PATCH 06/10] AXFS: axfs_super.c

> From this it would appear that if the region data can't be mapped XIP (i.e.
> it is compressed or on a block device), it is cached in its entirety in RAM?

That is correct.

> This implies for block devices that the entire filesystem metadata has to be
> cached in RAM.  This severely limits the size of AXFS filesystems when using
> block devices, or the else memory usage will be excessive.

This is where 64bit squashfs could be a better fit.
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