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Date: Wed, 1 Sep 2010 13:32:37 +1000
From: Anton Blanchard <anton@samba.org>
Subject: Re: [PATCH 00/10] zram: various improvements and cleanups
Message-ID: <20100901033237.GA18958@kryten>
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To: Nitin Gupta <ngupta@vflare.org>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>, Minchan Kim <minchan.kim@gmail.com>, Andrew Morton <akpm@linux-foundation.org>, Greg KH <greg@kroah.com>, Linux Driver Project <devel@linuxdriverproject.org>, linux-mm <linux-mm@kvack.org>, linux-kernel <linux-kernel@vger.kernel.org>
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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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