linux-kernel - Re: [Regression] 6.10-rc1: Fail to resurrect from suspend.

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Message-ID: <ZmrSVax+fzXNKyiq@duo.ucw.cz>
Date: Thu, 13 Jun 2024 13:04:53 +0200
From: Pavel Machek <pavel@....cz>
To: David Wang <00107082@....com>, regressions@...ts.linux.dev
Cc: sivanich@....com, kevin.tian@...el.com, baolu.lu@...ux.intel.co,
	jroedel@...e.de, linux-kernel@...r.kernel.org
Subject: Re: [Regression] 6.10-rc1: Fail to resurrect from suspend.

Hi!

> My system fails to resurrect after `systemctl suspend` with 6.10-rc1,
> when pressing power button, the machine "sounds" starting(fans roaring),
> but my keyboard/mouse/monitor is not powered, and I have nothing to
> do but powering cycle the system.
> 
> I run a bisect session, and narrows it down to following commit:
> 
> 	commit d74169ceb0d2e32438946a2f1f9fc8c803304bd6
> 	Author: Dimitri Sivanich <sivanich@....com>
> 	Date:   Wed Apr 24 15:16:29 2024 +0800
> 
> 	    iommu/vt-d: Allocate DMAR fault interrupts locally
> 	    
> 	    The Intel IOMMU code currently tries to allocate all DMAR fault interrupt
> 	    vectors on the boot cpu.  On large systems with high DMAR counts this
> 	    results in vector exhaustion, and most of the vectors are not initially
> 	    allocated socket local.
> 	    
> 	    Instead, have a cpu on each node do the vector allocation for the DMARs on
> 	    that node.  The boot cpu still does the allocation for its node during its
> 	    boot sequence.
> 	    
> 	    Signed-off-by: Dimitri Sivanich <sivanich@....com>
> 	    Reviewed-by: Kevin Tian <kevin.tian@...el.com>
> 	    Link: https://lore.kernel.org/r/Zfydpp2Hm+as16TY@hpe.com
> 	    Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
> 	    Signed-off-by: Joerg Roedel <jroedel@...e.de>
>  
> And I have confirmed that reverting this commit can fix my problem.

Bisected regression. Should we simply revert the patch?

								Pavel
-- 
People of Russia, stop Putin before his war on Ukraine escalates.

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