linux-kernel - Re: [PATCH 00/10] zram: various improvements and cleanups

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Date:	Wed, 1 Sep 2010 13:32:37 +1000
From:	Anton Blanchard <anton@...ba.org>
To:	Nitin Gupta <ngupta@...are.org>
Cc:	Pekka Enberg <penberg@...helsinki.fi>,
	Minchan Kim <minchan.kim@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg KH <greg@...ah.com>,
	Linux Driver Project <devel@...uxdriverproject.org>,
	linux-mm <linux-mm@...ck.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 00/10] zram: various improvements and cleanups


Hi Nitin,

I gave zram a try on a ppc64 box with a 64kB PAGE_SIZE. It looks like the
xvmalloc allocator fails when we add in a large enough block (in this case
65532 bytes).

flindex ends up as 127 which is larger than BITS_PER_LONG. We continually call
grow_block inside find_block and fail:

zram: Error allocating memory for compressed page: 0, size=467

Anton
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