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From: Salvatore Bonaccorso <>
To: Thorsten Leemhuis <>
Cc: Greg KH <>,
	Sagar Biradar <>,
	James Bottomley <>,
	"Martin K. Petersen" <>,
	Adaptec OEM Raid Solutions <>,
	"" <>,
	Sasha Levin <>,
	Linux kernel regressions list <>,
	Hannes Reinecke <>, scsi <>,
	LKML <>,
	Gilbert Wu <>,
	John Garry <>
Subject: Re: scsi regression that after months is still not addressed and now bothering 6.1.y users, too
Date: Fri, 29 Dec 2023 21:13:18 +0100	[thread overview]
Message-ID: <ZY8oXge0QKYUkO1b@eldamar.lan> (raw)
In-Reply-To: <>

Hi all,

On Sat, Nov 25, 2023 at 08:10:35AM +0100, Thorsten Leemhuis wrote:
> On 24.11.23 17:25, Greg KH wrote:
> > On Tue, Nov 21, 2023 at 10:50:57AM +0100, Thorsten Leemhuis wrote:
> >> * @SCSI maintainers: could you please look into below please?
> >>
> >> * @Stable team: you might want to take a look as well and consider a
> >> revert in 6.1.y (yes, I know, those are normally avoided, but here it
> >> might make sense).
> >>
> >> Hi everyone!
> >>
> >> TLDR: I noticed a regression (Adaptec 71605z with aacraid sometimes
> >> hangs for a while) that was reported months ago already but is still not
> >> fixed. Not only that, it apparently more and more users run into this
> >> recently, as the culprit was recently integrated into 6.1.y; I wonder if
> >> it would be best to revert it there, unless a fix for mainline comes
> >> into reach soon.
> >>
> >> Details:
> >>
> >> 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:
> >>
> >>
> >> 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.
> >[...]
> > I am loath to revert a stable patch that has been there for so long as
> > any upgrade will just cause the same bug to show back up. Why can't we
> > just revert it in Linus's tree now and I'll take that revert in the
> > stable trees as well?
> FWIW, I know and in general agree with that strategy, that's why I
> normally wouldn't have brought a stable-only revert up for
> consideration. But this issue to me looked somewhat special and urgent
> for two and a half reasons: (1) that backport apparently made a lot more
> people suddenly hit the issue (2) there was also this data corruption
> aspect one of the reporters mentioned (not sure if that is real and/or
> if this might be just a 6.1.y thing). Furthermore for 6.1.y it was
> recently confirmed that reverting the change fixes things, while we iirc
> had no such confirmation for recent mainline kernels at that point. So
> it looked like it would take a while to get this sorted out in mainline.
> But it seems we finally might get closer to that now, so yeah, maybe
> it's not worth a stable revert.

If I'm not completely wrong, finally indeed the commit has been
reverted in mainline, with c5becf57dd56 ("Revert "scsi: aacraid: Reply
queue mapping to CPUs based on IRQ affinity"") .

This is what was mentioned here:

So should/can it be reverted it now as well on the 6.1.y stable series
(and the others up as needed?)

#regzbot link:
#regzbot fixed-by: c5becf57dd56

Thorsten, hope I got the above right.


  reply	other threads:[~2023-12-29 20:13 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-21  9:50 scsi regression that after months is still not addressed and now bothering 6.1.y users, too Thorsten Leemhuis
2023-11-21  9:57 ` Thorsten Leemhuis
2023-11-21 11:30 ` John Garry
2023-11-21 12:24   ` Linux regression tracking (Thorsten Leemhuis)
2023-11-21 13:05     ` James Bottomley
2023-11-21 13:24       ` Linux regression tracking (Thorsten Leemhuis)
2023-11-21 13:31         ` James Bottomley
2023-11-24 16:25 ` Greg KH
2023-11-24 22:44   ` Martin K. Petersen
2023-11-25  7:10   ` Thorsten Leemhuis
2023-12-29 20:13     ` Salvatore Bonaccorso [this message]
2023-12-30 10:58       ` Greg KH

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