From: Walker, Benjamin <benjamin.walker at intel.com>
To: spdk@lists.01.org
Subject: Re: [SPDK] "Requested device XXX cannot be used" warning in device detach procedure may be misleading
Date: Mon, 13 Mar 2017 16:10:54 +0000 [thread overview]
Message-ID: <1489421452.12574.5.camel@intel.com> (raw)
In-Reply-To: 8b74f6ae-5d34-3934-06d2-f30ed72159e4@gmail.com
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On Mon, 2017-03-13 at 12:28 +0800, Freeman Zhang wrote:
> Hi
>
> On 3/13/17 12:03 PM, Chang, Cunyin wrote:
> >
> > Actually, the error message caused by the function
> > spdk_pci_device_detach(), after we detach the device, we try to
> > call the function
> > rte_eal_pci_probe_one(), but we do not have callback function for
> > the dpdk nvme driver at this point, so the error message show up,
> > but this function will add the device back to dpdk pci device
> > list, then we could probe the device next time when
> > we want to use it again. So it has no adverse effects but just one
> > error message, but we still trying to fix it now.
> >
>
> Thanks for your reply!
>
> I've noticed it and that is why I think it's kind of misleading. So I
> guess we should not focus only on reusing codes but also making it
> clearer for both users and developers.
The problem is that DPDK is not exposing a public API to do the
operation we need to do (unload a driver but not remove it entirely
from the list of PCI devices). We're working with the DPDK team to add
a public API to do that while also investigating better ways to work
around the issue that don't leave us with this confusing error message.
>
>
> All the best!
> Freeman
>
> _______________________________________________
> SPDK mailing list
> SPDK(a)lists.01.org
> https://lists.01.org/mailman/listinfo/spdk
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next reply other threads:[~2017-03-13 16:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-13 16:10 Walker, Benjamin [this message]
-- strict thread matches above, loose matches on Subject: below --
2017-03-13 4:28 [SPDK] "Requested device XXX cannot be used" warning in device detach procedure may be misleading Freeman Zhang
2017-03-13 4:03 Chang, Cunyin
2017-03-12 3:43 Freeman Zhang
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