linux-kernel - Re: scsi regression that after months is still not addressed and now bothering 6.1.y users, too

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Message-ID: <47e8fd80-3f87-4b87-a875-035e69961392@oracle.com>
Date:   Tue, 21 Nov 2023 11:30:51 +0000
From:   John Garry <john.g.garry@...cle.com>
To:     Thorsten Leemhuis <regressions@...mhuis.info>,
        Greg KH <gregkh@...uxfoundation.org>,
        Sagar Biradar <sagar.biradar@...rochip.com>,
        James Bottomley <James.Bottomley@...senPartnership.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Adaptec OEM Raid Solutions <aacraid@...rosemi.com>
Cc:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        Sasha Levin <sashal@...nel.org>,
        Linux kernel regressions list <regressions@...ts.linux.dev>,
        Hannes Reinecke <hare@...e.de>,
        scsi <linux-scsi@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Gilbert Wu <gilbert.wu@...rochip.com>
Subject: Re: scsi regression that after months is still not addressed and now
 bothering 6.1.y users, too

On 21/11/2023 09:50, Thorsten Leemhuis wrote:
> Quite a few machines with Adaptec controllers seems to hang for a few
> tens of seconds to a few minutes before things start to work normally
> again for a while:
> https://urldefense.com/v3/__https://bugzilla.kernel.org/show_bug.cgi?id=217599__;!!ACWV5N9M2RV99hQ!L26RD0hu99l3f709EFnXU_V7OaB1jG4Hi7BjKvxRuhDWKFmjrgfksLuXA6eBrBCRtOT8JcRRUvzRsHbyEm41r7tL_pbDfw$  
> 
> That problem is apparently caused by 9dc704dcc09eae ("scsi: aacraid:
> Reply queue mapping to CPUs based on IRQ affinity") [v6.4-rc7]. That
> commit despite a warning of mine to Sasha recently made it into 6.1.53
> -- and that way apparently recently reached more users recently, as
> quite a few joined that ticket.

Is there a full kernel log for this hanging system?

I can only see snippets in the ticket.

And what does /sys/class/scsi_host/host*/nr_hw_queues show?

Thanks,
John