linux-kernel - Re: [PATCH] VMware balloon: stop locking pages when hypervisor tells us enough

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 7 Dec 2010 17:10:23 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Dmitry Torokhov <dtor@...are.com>
Cc:	linux-kernel@...r.kernel.org, pv-drivers@...are.com
Subject: Re: [PATCH] VMware balloon: stop locking pages when hypervisor
 tells us enough

On Fri, 3 Dec 2010 08:52:26 -0800
Dmitry Torokhov <dtor@...are.com> wrote:

> When hypervisor decides to decrease target balloon size while the
> balloon driver tries to lock pages hypervisor may respond with
> VMW_BALLOON_PPN_NOTNEEDED. Use this data and immediately stop reserving
> pages and wait for the next update cycle to fetch new target instead
> of continuing trying to lock pages until size of refused list grows
> above VMW_BALLOON_MAX_REFUSED (16) pages.

OK, but ... why?  What is the externally visible effect of this change?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/