From: Michal Hocko <mhocko@kernel.org>
To: David Hildenbrand <david@redhat.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-acpi@vger.kernel.org,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Andrew Morton <akpm@linux-foundation.org>,
Oscar Salvador <osalvador@suse.de>
Subject: Re: [PATCH v1] ACPI / scan: Acquire device_hotplug_lock in acpi_scan_init()
Date: Fri, 26 Jul 2019 10:44:08 +0200 [thread overview]
Message-ID: <20190726084408.GK6142@dhcp22.suse.cz> (raw)
In-Reply-To: <38d76051-504e-c81a-293a-0b0839e829d3@redhat.com>
On Fri 26-07-19 10:36:42, David Hildenbrand wrote:
> On 26.07.19 10:31, Michal Hocko wrote:
[...]
> > Anyway, my dislike of the device_hotplug_lock persists. I would really
> > love to see it go rather than grow even more to the hotplug code. We
> > should be really striving for mem hotplug internal and ideally range
> > defined locking longterm.
>
> Yes, and that is a different story, because it will require major
> changes to all add_memory() users. (esp, due to the documented race
> conditions). Having that said, memory hotplug locking is not ideal yet.
I am really happy to hear that we are on the same page here. Do we have
any document (I am sorry but I am lacking behind recent development in
this area) that describes roadblocks to remove device_hotplug_lock?
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2019-07-26 8:44 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-24 14:30 [PATCH v1] ACPI / scan: Acquire device_hotplug_lock in acpi_scan_init() David Hildenbrand
2019-07-25 9:11 ` Rafael J. Wysocki
2019-07-25 9:18 ` Oscar Salvador
2019-07-25 9:22 ` Rafael J. Wysocki
2019-07-25 9:23 ` David Hildenbrand
2019-07-25 12:56 ` Michal Hocko
2019-07-25 13:05 ` David Hildenbrand
2019-07-25 13:57 ` Michal Hocko
2019-07-25 14:35 ` David Hildenbrand
2019-07-25 19:19 ` Michal Hocko
2019-07-25 20:49 ` David Hildenbrand
2019-07-25 21:23 ` Rafael J. Wysocki
2019-07-26 7:20 ` David Hildenbrand
2019-07-26 7:57 ` Michal Hocko
2019-07-26 8:05 ` David Hildenbrand
2019-07-26 8:31 ` Michal Hocko
2019-07-26 8:36 ` David Hildenbrand
2019-07-26 8:44 ` Michal Hocko [this message]
2019-07-26 8:57 ` David Hildenbrand
2019-07-26 10:31 ` Michal Hocko
2019-07-26 10:37 ` David Hildenbrand
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