netdev - Re: [EXT] Aquantia ethernet driver suspend/resume issues

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Message-Id: <E8060D65-F6C2-4AF5-AE3F-8ED8A30F95EF@pwaller.net>
Date: Tue, 23 Jan 2024 15:13:54 +0000
From: Peter Waller <p@...ller.net>
To: Igor Russkikh <irusskikh@...vell.com>
Cc: Jakub Kicinski <kuba@...nel.org>,
 Linus Torvalds <torvalds@...ux-foundation.org>,
 Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
 Netdev <netdev@...r.kernel.org>
Subject: Re: [EXT] Aquantia ethernet driver suspend/resume issues

True, it is a warning rather than a hard crash, though shutdown hangs. Thanks for the workaround.

I can provide more dmesg when I’m back at my computer. Do you need the whole thing or is there something in particular you want from it? From memory there isn’t much more in the way of messages that looked connected to me.

Sent from my mobile, please excuse brevity

> On 23 Jan 2024, at 14:59, Igor Russkikh <irusskikh@...vell.com> wrote:
> 
> 
>> On 1/21/2024 10:05 PM, Peter Waller wrote:
>> I see a fix for double free [0] landed in 6.7; I've been running that
>> for a few days and have hit a resume from suspend issue twice. Stack
>> trace looks a little different (via __iommu_dma_map instead of
>> __iommu_dma_free), provided below.
>> 
>> I've had resume issues with the atlantic driver since I've had this
>> hardware, but it went away for a while and seems as though it may have
>> come back with 6.7. (No crashes since logs begin on Dec 15 till Jan 12,
>> Upgrade to 6.7; crashes 20th and 21st, though my usage style of the
>> system has also varied, maybe crashes are associated with higher memory
>> usage?).
> 
> Hi Peter,
> 
> Are these hard crashes, or just warnings in dmesg you see?
> From the log you provided it looks like a warning, meaning system is usable
> and driver can be restored with `if down/up` sequence.
> 
> If so, then this is somewhat expected, because I'm still looking into
> how to refactor this suspend/resume cycle to reduce mem usage.
> Permanent workaround would be to reduce rx/tx ring sizes with something like
> 
>    ethtool -G rx 1024 tx 1024
> 
> If its a hard panic, we should look deeper into it.
> 
>> Possibly unrelated but I also see fairly frequent (1 to ten times per
>> boot, since logs begin?) messages in my logs of the form "atlantic
>> 0000:0c:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0014
>> address=0xffce8000 flags=0x0020]".
> 
> Seems to be unrelated, but basically indicates HW or FW tries to access unmapped
> memory addresses, and iommu catches that.
> Full dmesg may help analyze this.
> 
> Regards
>  Igor