From: Arjan van de Ven <arjanv@redhat.com>
To: Petr Vandrovec <vandrove@vc.cvut.cz>
Cc: Ville Herva <vherva@viasys.com>, Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org
Subject: Re: 2.6.8.1-mm2 breaks vmware
Date: Sun, 22 Aug 2004 17:07:47 +0200 [thread overview]
Message-ID: <20040822150747.GB13131@devserv.devel.redhat.com> (raw)
In-Reply-To: <20040822143112.GB24092@vana.vc.cvut.cz>
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On Sun, Aug 22, 2004 at 04:31:12PM +0200, Petr Vandrovec wrote:
> Whole situation (with originally released vmmon) looked like that vmware binary
> issued ioctl() to allocate memory, marked that page PG_RESERVED, and returned
> physical page number to userspace. Userspace then opened /dev/mem, and mapped
> that page to the process. On cleanup /dev/mem was unmapped, PG_RESERVED bit
> was cleared, and page released (in my updates PG_RESERVED setting/clearing is
> removed, as it badly intereferes with page's refcounting).
I've sent andrew a patch that allows such mmaps again for PG_RESERVED pages.
The approach vmware did is rather questionable (as you say) and thankfully
fixed later, but breaking it is not entirely required.
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next prev parent reply other threads:[~2004-08-22 15:08 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-20 10:42 2.6.8.1-mm2 breaks vmware Ville Herva
2004-08-20 10:51 ` Andrew Morton
2004-08-20 13:18 ` Ville Herva
2004-08-20 14:43 ` Ville Herva
2004-08-20 15:16 ` Ville Herva
2004-08-20 18:45 ` Andrew Morton
2004-08-20 18:49 ` Arjan van de Ven
2004-08-20 19:30 ` Ville Herva
2004-08-22 11:42 ` Tonnerre
2004-08-22 13:59 ` Petr Vandrovec
2004-08-22 14:15 ` Alan Cox
2004-08-20 19:25 ` Ville Herva
2004-08-21 6:29 ` Ville Herva
[not found] ` <20040821134918.GA1585@devserv.devel.redhat.com>
[not found] ` <20040821190027.GQ3024@viasys.com>
[not found] ` <20040821190730.GA25932@devserv.devel.redhat.com>
2004-08-22 14:31 ` Petr Vandrovec
2004-08-22 15:07 ` Arjan van de Ven [this message]
2004-08-22 21:19 ` Ville Herva
2004-08-23 5:53 ` [OT] vmware, 2.6 kernel and altgr key (Re: 2.6.8.1-mm2 breaks vmware) Ville Herva
2004-08-20 12:11 ` 2.6.8.1-mm2 breaks vmware Arjan van de Ven
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