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Date: Thu, 13 Jun 2024 13:04:53 +0200
From: Pavel Machek <pavel@ucw.cz>
To: David Wang <00107082@163.com>, regressions@lists.linux.dev
Cc: sivanich@hpe.com, kevin.tian@intel.com, baolu.lu@linux.intel.co,
	jroedel@suse.de, linux-kernel@vger.kernel.org
Subject: Re: [Regression] 6.10-rc1: Fail to resurrect from suspend.
Message-ID: <ZmrSVax+fzXNKyiq@duo.ucw.cz>
References: <20240530114907.4836-1-00107082@163.com>
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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.
>=20
> I run a bisect session, and narrows it down to following commit:
>=20
> 	commit d74169ceb0d2e32438946a2f1f9fc8c803304bd6
> 	Author: Dimitri Sivanich <sivanich@hpe.com>
> 	Date:   Wed Apr 24 15:16:29 2024 +0800
>=20
> 	    iommu/vt-d: Allocate DMAR fault interrupts locally
> 	   =20
> 	    The Intel IOMMU code currently tries to allocate all DMAR fault inte=
rrupt
> 	    vectors on the boot cpu.  On large systems with high DMAR counts this
> 	    results in vector exhaustion, and most of the vectors are not initia=
lly
> 	    allocated socket local.
> 	   =20
> 	    Instead, have a cpu on each node do the vector allocation for the DM=
ARs on
> 	    that node.  The boot cpu still does the allocation for its node duri=
ng its
> 	    boot sequence.
> 	   =20
> 	    Signed-off-by: Dimitri Sivanich <sivanich@hpe.com>
> 	    Reviewed-by: Kevin Tian <kevin.tian@intel.com>
> 	    Link: https://lore.kernel.org/r/Zfydpp2Hm+as16TY@hpe.com
> 	    Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
> 	    Signed-off-by: Joerg Roedel <jroedel@suse.de>
> =20
> And I have confirmed that reverting this commit can fix my problem.

Bisected regression. Should we simply revert the patch?

								Pavel
--=20
People of Russia, stop Putin before his war on Ukraine escalates.

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