linux-kernel - Re: kernel 5.15 does not boot with 3ware card (never had this issue <= 5.14) - scsi 0:0:0:0: WARNING: (0x06:0x002C) : Command (0x12) timed out, resetting card

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Message-ID: <0d9db49d-84c2-4fda-3c7d-0286cdff8cf6@huawei.com>
Date:   Mon, 1 Nov 2021 08:53:13 +0000
From:   John Garry <john.garry@...wei.com>
To:     Bart Van Assche <bvanassche@....org>,
        Justin Piszcz <jpiszcz@...idpixels.com>,
        <linux-kernel@...r.kernel.org>, <linux-scsi@...r.kernel.org>
Subject: Re: kernel 5.15 does not boot with 3ware card (never had this issue
 <= 5.14) - scsi 0:0:0:0: WARNING: (0x06:0x002C) : Command (0x12) timed out,
 resetting card

On 31/10/2021 23:52, Bart Van Assche wrote:
> On 10/31/21 16:19, Justin Piszcz wrote:
>> Diff between 5.14 and 5.15 .config files-- could it be something to do 
>> with
>> CONFIG_IOMMU_DEFAULT_DMA_LAZY=y?

On x86 (intel or amd) iommu we were using lazy mode previously, but just 
did not have a config option, so should not make a difference.


> 
> That's hard to say. Is CONFIG_MAGIC_SYSRQ enabled? If not, please enable 
> it and hit Alt-Printscreen-t (dump task list; see also 
> Documentation/admin-guide/sysrq.rst) and share the contents of the 
> kernel log. If that would not be convenient, please try to bisect this 
> issue.