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From: Zheng Liu <gnehzuil.liu@gmail.com>
To: Slava Pestov <sp@datera.io>
Cc: linux-bcache@vger.kernel.org, Zheng Liu <wenqing.lz@taobao.com>
Subject: Re: How to invalidate all cache
Date: Mon, 13 Oct 2014 11:45:37 +0800	[thread overview]
Message-ID: <20141013034536.GA13155@gmail.com> (raw)
In-Reply-To: <CACHGV4Jn3ML=2PO9FtoT4OXZCtpt56bOb=TmnVanv7Tm2MJyDg@mail.gmail.com>

Hi Slava,

Thanks for your reply.

On Sun, Oct 12, 2014 at 08:16:31PM -0700, Slava Pestov wrote:
> You can try to detach the backing device, which will cause all dirty
> data to be written back, and attach it again.

Yes, detaching a backing device will make all dirty data to be written
back to the backing device.  But if I understand correctly it couldn't
invalidate all data in cache device.  That means that after attaching
backing device the data in cache device is still valid.  All I want to
do is to remove all data in cache device.  Any idea?

Regards,
                                                - Zheng

> 
> On Sun, Oct 12, 2014 at 8:03 PM, Zheng Liu <gnehzuil.liu@gmail.com> wrote:
> > Hi all,
> >
> > I am trying to do some benchmarks against bcache, espeically in cache
> > miss scenario, but I don't find a user interface to invalidate all
> > cache.  Anyone can tell me how to do that.
> >
> > Thanks in advance,
> >                                                 - Zheng
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-bcache" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html

  reply	other threads:[~2014-10-13  3:35 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-10-13  3:03 How to invalidate all cache Zheng Liu
2014-10-13  3:16 ` Slava Pestov
2014-10-13  3:45   ` Zheng Liu [this message]
2014-10-13  3:43     ` Re[2]: " Pavel Goran
2014-10-13 13:30       ` Zheng Liu
2014-10-13 18:13         ` (unknown) Eric Wheeler

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