From: Kent Overstreet <kent.overstreet@gmail.com>
To: Marc MERLIN <marc@merlins.org>
Cc: linux-bcache@vger.kernel.org
Subject: Re: echo dev > /sys/fs/bcache/register gives page allocation failure: order:4, mode:0x2040d0
Date: Mon, 15 Feb 2016 03:11:04 -0900 [thread overview]
Message-ID: <20160215121104.GA30514@kmo-pixel> (raw)
In-Reply-To: <20160215060410.GA30802@merlins.org>
On Sun, Feb 14, 2016 at 10:04:10PM -0800, Marc MERLIN wrote:
> I was able to make one bcache ok, but when trying to make a 2nd one
> where I only have a backing device, I'm getting repeated page allocation
> failures.
>
> Just to be clear, this is what I want to do: every new HD backed device
> will have bcache on top even if I don't have a cache device for it, so
> that I can add bcache later.
> Is it something reasonable to do? Setup partitions as bcache backing
> devices without a cache device for them?
>
> So right now, I'm trying to do
> md5 - bcache - dmcrypt - btrfs
>
> So I did
> make-bcache -B /dev/md5
> echo /dev/md5 > /sys/fs/bcache/register
>
> and it fails:
> bash: page allocation failure: order:4, mode:0x2040d0
You want CONFIG_COMPACTION=y
next prev parent reply other threads:[~2016-02-15 12:11 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-15 6:04 echo dev > /sys/fs/bcache/register gives page allocation failure: order:4, mode:0x2040d0 Marc MERLIN
2016-02-15 12:02 ` Johannes Thumshirn
2016-02-15 15:32 ` Marc MERLIN
2016-02-15 15:45 ` Christoph Nelles
2016-02-23 16:32 ` Marc MERLIN
2016-02-23 20:57 ` Marc MERLIN
2016-02-24 20:45 ` BUG: drivers/md/bcache/writeback.c:237 Marc MERLIN
2016-02-25 0:58 ` Eric Wheeler
2016-02-25 6:41 ` Eric Wheeler
2016-02-25 7:36 ` Eric Wheeler
2016-02-25 10:08 ` Zhu Yanhai
2016-02-26 2:38 ` Eric Wheeler
2016-02-26 2:46 ` Marc MERLIN
2016-02-26 3:19 ` Marc MERLIN
2016-02-26 4:55 ` Eric Wheeler
2016-02-26 16:27 ` Marc MERLIN
2016-02-26 21:17 ` Eric Wheeler
2016-03-03 4:17 ` Eric Wheeler
2016-03-03 4:25 ` Marc MERLIN
2016-02-25 10:18 ` Zhu Yanhai
2016-02-25 15:20 ` Marc MERLIN
2016-02-25 23:44 ` Eric Wheeler
2016-02-26 0:17 ` Marc MERLIN
2016-02-15 12:11 ` Kent Overstreet [this message]
2016-02-24 6:53 ` echo dev > /sys/fs/bcache/register gives page allocation failure: order:4, mode:0x2040d0 Eric Wheeler
2016-02-24 16:37 ` Disabling bcache from boot when it crashes? Marc MERLIN
2016-02-24 19:10 ` Eric Wheeler
2016-02-25 5:48 ` Marc MERLIN
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