[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] Re: [PATCH 01/32] use anonymous memory for kqemu.
From: |
Jan Kiszka |
Subject: |
[Qemu-devel] Re: [PATCH 01/32] use anonymous memory for kqemu. |
Date: |
Thu, 23 Oct 2008 16:17:43 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
Anthony Liguori wrote:
> The idea behind this patch is that currently kqemu uses /dev/shm for
> memory allocations instead of anonymous memory (like the rest of QEMU).
> Instead of introducing YA hook, we can just switch kqemu to use
> anonymous memory and eliminate the special case.
>
> If I recall correctly, the reason for using /dev/shm was concern that
> get_user_pages() didn't do the right thing for anonymous memory and the
> use of /dev/shm was a hack around that. However, I'm not sure that was
> ever the case. Certainly, with any sufficiently modern kernel
> get_user_pages() does what one would expect. KVM uses get_user_pages()
> on anonymous memory in roughly the same way kqemu uses it now.
>
> So I think it's safe to make the switch. Fabrice, what do you think?
This hack-around, was it purely Linux-motivated? Or did/do other OSes
have similar issues?
Jan
--
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux
- [Qemu-devel] [PATCH 0/32] New shot at accelerators, Glauber Costa, 2008/10/23
- [Qemu-devel] [PATCH 01/32] use anonymous memory for kqemu., Glauber Costa, 2008/10/23
- [Qemu-devel] Re: [PATCH 01/32] use anonymous memory for kqemu., Jan Kiszka, 2008/10/23
- [Qemu-devel] Re: [PATCH 01/32] use anonymous memory for kqemu., Anthony Liguori, 2008/10/23
- [Qemu-devel] Re: [PATCH 01/32] use anonymous memory for kqemu.,
Jan Kiszka <=
- [Qemu-devel] Re: [PATCH 01/32] use anonymous memory for kqemu., Anthony Liguori, 2008/10/23
- Re: [Qemu-devel] Re: [PATCH 01/32] use anonymous memory for kqemu., Leonardo Reiter, 2008/10/23
- Re: [Qemu-devel] Re: [PATCH 01/32] use anonymous memory for kqemu., Leonardo Reiter, 2008/10/23
- Re: [Qemu-devel] Re: [PATCH 01/32] use anonymous memory for kqemu., Andreas Färber, 2008/10/24
- Re: [Qemu-devel] Re: [PATCH 01/32] use anonymous memory for kqemu., Ben Taylor, 2008/10/24
- [Qemu-devel] QEMU on Solaris 10 (was: [PATCH 01/32] use anonymous memory for kqemu.), Andreas Färber, 2008/10/25
- Re: [Qemu-devel] QEMU on Solaris 10 (was: [PATCH 01/32] use anonymous memory for kqemu.), Andreas Färber, 2008/10/25
- Re: [Qemu-devel] QEMU on Solaris 10 (was: [PATCH 01/32] use anonymous memory for kqemu.), Blue Swirl, 2008/10/25
- [Qemu-devel] Re: [PATCH 01/32] use anonymous memory for kqemu., Glauber Costa, 2008/10/24
[Qemu-devel] [PATCH 02/32] protect exec-all.h frm multiple inclusion, Glauber Costa, 2008/10/23