linux-kernel - RE: Linux does not use more than the startup RAM under Hyper-V with dynamic memory enabled RE: [PATCH 2/2] Drivers: hv: balloon: Online the hot-added memory "in context" Re: [PATCH 1/1] Drivers: hv:

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Date:	Thu, 6 Mar 2014 10:25:07 -0800
From:	"Jeff Leung" <jleung@...networks.ca>
To:	"Brian Wong" <draconicpenguin1@...oo.com>,
	"Victor Miasnikov" <vvm@....by>,
	"KY Srinivasan" <kys@...rosoft.com>, <linux-kernel@...r.kernel.org>
Cc:	"Abhishek Gupta (LIS)" <abgupta@...rosoft.com>
Subject: RE: Linux does not use more than the startup RAM under Hyper-V with dynamic memory enabled RE: [PATCH 2/2] Drivers: hv: balloon: Online the hot-added memory "in context" Re: [PATCH 1/1] Drivers: hv:

> So can I expect to see this patched by the next kernel version?

I would hold your breath on this one. The maintainers of the memory
subsystem has rejected the patch exposing certain functions so
hv_balloon can online the newly added memory to the system. They think
that having udev to handle such events is a better place.

And in case if somebody hasn't posted it here, this is the udev rule
that KY has given to me in the past:

SUBSYSTEM=="memory", ACTION=="add", RUN+="/bin/sh -c '[ -f
/sys$devpath/state ] && echo online > /sys$devpath/state'"

> --
> Brian Wong
> http://www.fierydragonlord.com
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