From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Sam Bobroff <sam.bobroff@au1.ibm.com>, linuxppc-dev@lists.ozlabs.org
Subject: Re: [1/1] powerpc/pseries: Enable RAS hotplug events late
Date: Wed, 14 Feb 2018 16:43:47 +1100 (AEDT) [thread overview]
Message-ID: <3zh7cg1KxQz9t5R@ozlabs.org> (raw)
In-Reply-To: <b3202827b5f22e9a7e8f145f83140698911641f7.1518394650.git.sam.bobroff@au1.ibm.com>
On Mon, 2018-02-12 at 00:19:29 UTC, Sam Bobroff wrote:
> Currently if the kernel receives a memory hot-unplug event early
> enough, it may get stuck in an infinite loop in
> dissolve_free_huge_pages(). This appears as a stall just after:
>
> pseries-hotplug-mem: Attempting to hot-remove XX LMB(s) at YYYYYYYY
>
> It appears to be caused by "minimum_order" being uninitialized, due to
> init_ras_IRQ() executing before hugetlb_init().
>
> To correct this, extract the part of init_ras_IRQ() that enables
> hotplug event processing and place it in the machine_late_initcall
> phase, which is guaranteed to be after hugetlb_init() is called.
>
> Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
> Acked-by: Balbir Singh <bsingharora@gmail.com>
Applied to powerpc fixes, thanks.
https://git.kernel.org/powerpc/c/c9dccf1d074a67d36c510845f66398
cheers
prev parent reply other threads:[~2018-02-14 5:43 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-12 0:19 [PATCH 1/1] powerpc/pseries: Enable RAS hotplug events late Sam Bobroff
2018-02-12 5:46 ` Balbir Singh
2018-02-14 5:43 ` Michael Ellerman [this message]
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