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From: Greg KH <gregkh@linuxfoundation.org>
To: Ulf Markwardt <ulf.markwardt@tu-dresden.de>
Cc: stable@vger.kernel.org, regressions@lists.linux.dev
Subject: Re: Infiniband PKEY Regression 6.12.115
Date: Mon, 2 Nov 2026 12:22:45 +0100	[thread overview]
Message-ID: <2026110214-property-unaligned-70bb@gregkh> (raw)
In-Reply-To: <aaa3241b-4dc7-47da-8703-067ffc4ce252@tu-dresden.de>

On Mon, Nov 02, 2026 at 07:38:39AM +0100, Ulf Markwardt wrote:
> Dear Linux Developers,
> we are running 6.12.x kernels with AlmaLinux 9.8 as OS on some HPC clusters.
> From 6.12.114 to 6.12.115 we experience this regression on a certain host type:
> 
> The InfiniBand P_Key tables do not get populated by the SM (opensm) when
> booting kernel 6.12.115. All IPoIB child interfaces that require a specific P_Key
> (e.g. 0x8001, 0x8002) fail with "P_Key not found". With kernel 6.12.114 the
> P_Key tables get populated and all IPoIB subinterfaces come up at boot time.

Any chance you can run 'git bisect' to find the offending commit?

And always cc: the relevant subsystem developers to please.

thanks,

greg k-h

  reply	other threads:[~2026-11-02 11:22 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-11-02  6:38 Infiniband PKEY Regression 6.12.115 Ulf Markwardt
2026-11-02 11:22 ` Greg KH [this message]
2026-11-05  6:32   ` Ulf Markwardt

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