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Date:      Tue, 3 Jul 2018 14:47:07 -0400
From:      Michael Butler <imb@protected-networks.net>
To:        Sean Bruno <sbruno@freebsd.org>, freebsd-current@freebsd.org
Subject:   Re: em0 link fail
Message-ID:  <8e2bf594-6d7e-477e-836b-4cc4483cb525@protected-networks.net>
In-Reply-To: <c077fa70-e213-7229-1c19-2509f5db191b@freebsd.org>
References:  <739ef71a-f29f-68ea-955a-fb53c57960a6@protected-networks.net> <c077fa70-e213-7229-1c19-2509f5db191b@freebsd.org>

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On 07/03/18 14:31, Sean Bruno wrote:
> 
> 
> On 07/03/18 11:47, Michael Butler wrote:
>> On June 1st, I was able to do my monthly laptop ZFS snap-shot/back-up
>> (using "zfs snapshot -r zroot@backup; zfs send -R >nfs-filesys"). Now I
>> can't without the em0 interface stalling :-(
>>
> 
> Can you tell what version of FreeBSD SVN was in use on "June 1st" ?
> 
> sean

That would've been ..

Jun  1 09:56:15 toshi kernel: FreeBSD 12.0-CURRENT #35 r334484: Fri Jun
1 08:25:58 EDT 2018

I'm going to build one with SVN r334862 reverted to see if that works,

	imb


> 
>> On a guess, I tried reverting SVN r335303 but that didn't help.
>>
>> em0: <Intel(R) PRO/1000 Network Connection> port 0xf080-0xf09f mem
>> 0xf7e00000-0xf7e1ffff,0xf7e39000-0xf7e39fff irq 20 at device 25.0 on pci0
>> em0: attach_pre capping queues at 1
>> em0: using 1024 tx descriptors and 1024 rx descriptors
>> em0: msix_init qsets capped at 1
>> em0: PCIY_MSIX capability not found; or rid 0 == 0.
>> em0: Using an MSI interrupt
>> em0: allocated for 1 tx_queues
>> em0: allocated for 1 rx_queues
>> em0: Ethernet address: f0:1f:af:66:95:7e
>> em0: netmap queues/slots: TX 1/1024, RX 1/1024
>> em0: link state changed to UP
>>
>>  [ initiate "zfs send" ]
>>
>> em0: TX(0) desc avail = 41, pidx = 172
>> em0: link state changed to DOWN
>> em0: TX(0) desc avail = 1024, pidx = 0
>> em0: TX(0) desc avail = 1024, pidx = 0
>>
>>  .. ad nauseum ..
>>
>> "ifconfig em0 down; ifconfig em0 up" doesn't help.
>>
>> Any hints?
>>
>> 	imb
>>
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>>
> 




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