From: Bart Van Assche <Bart.VanAssche@sandisk.com>
To: "linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"bergwolf@gmail.com" <bergwolf@gmail.com>
Cc: "jejb@linux.vnet.ibm.com" <jejb@linux.vnet.ibm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"martin.petersen@oracle.com" <martin.petersen@oracle.com>
Subject: Re: [PATCH RFC] scsi: wait sd probing in manual scan
Date: Wed, 3 May 2017 18:15:02 +0000 [thread overview]
Message-ID: <1493835300.3901.28.camel@sandisk.com> (raw)
In-Reply-To: <1493365699-25566-1-git-send-email-bergwolf@gmail.com>
On Fri, 2017-04-28 at 15:48 +0800, Peng Tao wrote:
> We have a guest init programe trying to mount a device after doing scsi host scan
> at boot time. Occasionally it fails to find the device when mounting. After digging
> a bit, it seems the root cause is sd async_schedule probing.
>
> With async probing, there is no guarantee of device readiness when scsi host
> scan finishes. However, users do expect to have a valid way to make sure device
> is usable. Change scsi scan to wait sd probing in manual scan case so that we
> don't leave user with random device state when scsi host scan returns.
>
> Is this the right way to have such guarantee?
Hello Peng,
Please fix the guest init program such that it waits until the SCSI device
it needs is ready.
Thanks,
Bart.
prev parent reply other threads:[~2017-05-03 18:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-28 7:48 [PATCH RFC] scsi: wait sd probing in manual scan Peng Tao
2017-05-03 18:15 ` Bart Van Assche [this message]
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