From: "Roger Pau Monné" <roger.pau@citrix.com>
To: Valentin Vidic <Valentin.Vidic@CARNet.hr>
Cc: <drbd-user@lists.linbit.com>, Jens Axboe <axboe@kernel.dk>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
<linux-kernel@vger.kernel.org>, <stable@vger.kernel.org>,
<linux-block@vger.kernel.org>, <xen-devel@lists.xenproject.org>
Subject: Re: [DRBD-user] [PATCH] xen-blkback: Switch to closed state after releasing the backing device
Date: Fri, 14 Sep 2018 18:18:41 +0200 [thread overview]
Message-ID: <20180914161841.zqenjczqgfkycdmm@mac.bytemobile.com> (raw)
In-Reply-To: <20180914114951.GH2153@gavran.carpriv.carnet.hr>
On Fri, Sep 14, 2018 at 01:49:51PM +0200, Valentin Vidic wrote:
> On Thu, Sep 13, 2018 at 05:08:00PM +0200, Roger Pau Monné wrote:
> > So I have the following patch which I think might solve your issues
> > while keeping the reset logic working. Would you mind giving it a try
> > with your use case and pvgrub?
>
> Thanks for the patch. It seems to be having some problems with pvgrub:
> machines don't boot past pvgrub and they are using 100% CPU. Also in
> dom0 xenstored is usind 100% CPU - strace reports it is looping in this:
>
> read(26, "\\\240\0\0", 4) = 4
> read(26, "\0\0\0\0L\0\0\0)\0\0\0\35\0\0\0+\\\232`\231\31\1&", 24) = 24
> read(26, "/local/domain/0/backend/vbd/1/51712/state", 41) = 41
> read(26, "\2\0\0\0\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0004", 29) = 29
> read(26, "\0\330\0\0", 4) = 4
> read(26, "\0\0\0\0L\0\0\0)\0\0\0\35\0\0\0+\\JG\231\31\1&", 24) = 24
> read(26, "/local/domain/0/backend/vbd/2/51712/state", 41) = 41
> read(26, "\2\0\0\0\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\2\0\0\0\1\0\0\0004", 29) = 29
> read(26, "\0\200\1\0", 4) = 4
> read(26, "\0\0\0\0L\0\0\0)\0\0\0\35\0\0\0+\\Z\373\231\31\1&", 24) = 24
> read(26, "/local/domain/0/backend/vbd/5/51712/state", 41) = 41
> read(26, "\2\0\0\0\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\5\0\0\0\1\0\0\0004", 29) = 29
> read(12, "\321\1\0\0", 4) = 4
> write(12, "\321\1\0\0", 4) = 4
I see the issue, blkfront in pvgrub is waiting for the backend to
switch to Closed state before booting the OS kernel, so my fix is not
going to work. I guess I will have to find a proper way to switch to
Closed state.
Thanks, Roger.
next prev parent reply other threads:[~2018-09-14 16:19 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-29 6:52 [PATCH] xen-blkback: Switch to closed state after releasing the backing device Valentin Vidic
2018-08-29 8:16 ` Juergen Gross
2018-08-29 8:27 ` Valentin Vidic
2018-08-29 8:43 ` Juergen Gross
2018-08-29 9:23 ` Valentin Vidic
2018-08-29 9:29 ` Juergen Gross
2018-09-05 10:36 ` Roger Pau Monné
2018-09-05 16:27 ` Valentin Vidic
2018-09-06 16:14 ` Roger Pau Monné
2018-09-06 22:03 ` Valentin Vidic
2018-09-07 12:03 ` [DRBD-user] " Lars Ellenberg
2018-09-07 12:13 ` Valentin Vidic
2018-09-07 13:28 ` Lars Ellenberg
2018-09-07 16:45 ` Valentin Vidic
2018-09-07 17:14 ` Valentin Vidic
2018-09-08 7:34 ` Valentin Vidic
2018-09-10 12:45 ` Lars Ellenberg
2018-09-10 13:22 ` Valentin Vidic
2018-09-10 15:00 ` Roger Pau Monné
2018-09-10 16:18 ` Valentin Vidic
2018-09-13 15:08 ` Roger Pau Monné
2018-09-14 11:49 ` Valentin Vidic
2018-09-14 16:18 ` Roger Pau Monné [this message]
[not found] ` <20180905113515.GU26705@gavran.carpriv.carnet.hr>
2018-09-05 16:28 ` Valentin Vidic
2018-09-06 16:29 ` Roger Pau Monné
2018-09-06 22:19 ` Valentin Vidic
2018-09-07 7:15 ` Roger Pau Monné
2018-09-07 7:23 ` Valentin Vidic
2018-09-07 7:54 ` Roger Pau Monné
2018-09-07 10:20 ` Valentin Vidic
2018-09-07 10:43 ` Roger Pau Monné
2018-09-07 11:15 ` Valentin Vidic
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