From: Michal Hocko <mhocko@kernel.org>
To: Dan Williams <dan.j.williams@intel.com>
Cc: David Hildenbrand <david@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
stable <stable@vger.kernel.org>,
Vishal Verma <vishal.l.verma@intel.com>,
Pavel Tatashin <pasha.tatashin@soleen.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Linux MM <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mm/memory_hotplug: Fix remove_memory() lockdep splat
Date: Fri, 24 Jan 2020 13:45:12 +0100 [thread overview]
Message-ID: <20200124124512.GT29276@dhcp22.suse.cz> (raw)
In-Reply-To: <CAPcyv4iiYtN6iGt=rVuNR=O=H9YcY1b1yWp+5TuDhu0QoVqT_A@mail.gmail.com>
On Fri 10-01-20 13:27:24, Dan Williams wrote:
> On Fri, Jan 10, 2020 at 9:42 AM David Hildenbrand <david@redhat.com> wrote:
[...]
> > For your reference (roughly 5 months ago, so not that old)
> >
> > https://lkml.kernel.org/r/20190724143017.12841-1-david@redhat.com
>
> Oh, now I see the problem. You need to add that lock so far away from
> the __add_memory() to avoid lock inversion problems with the
> acpi_scan_lock. The organization I was envisioning would not work
> without deeper refactoring.
Sorry to come back to this late. Has this been resolved?
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2020-01-24 12:45 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-10 4:30 Dan Williams
2020-01-10 9:10 ` David Hildenbrand
2020-01-10 16:42 ` Dan Williams
2020-01-10 16:54 ` David Hildenbrand
2020-01-10 16:57 ` David Hildenbrand
2020-01-10 17:24 ` Dan Williams
2020-01-10 17:29 ` David Hildenbrand
2020-01-10 17:33 ` Dan Williams
2020-01-10 17:36 ` David Hildenbrand
2020-01-10 17:39 ` Dan Williams
2020-01-10 17:42 ` David Hildenbrand
2020-01-10 21:27 ` Dan Williams
2020-01-24 12:45 ` Michal Hocko [this message]
2020-01-24 18:04 ` Dan Williams
2020-01-24 18:13 ` David Hildenbrand
2020-01-27 13:47 ` Michal Hocko
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