From: Jeremy Fitzhardinge <jeremy@goop.org>
To: tgh <wwwwww4187@sina.com.cn>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>,
Xen-devel <xen-devel@lists.xensource.com>,
Andi Kleen <ak@suse.de>, lkml <linux-kernel@vger.kernel.org>,
Chris Wright <chrisw@sous-sol.org>,
Andrew Morton <akpm@linux-foundation.com>
Subject: Re: [Xen-devel] [patch 30/44] xen: Add support for preemption
Date: Tue, 30 Oct 2007 10:25:35 -0700 [thread overview]
Message-ID: <4727690F.4030502@goop.org> (raw)
In-Reply-To: <4726F51C.4030709@sina.com.cn>
tgh wrote:
> hi
> I am using xen,and I am curious about whether Xen support the preempt
> scheduler for the VMs or not
> could the VM be prempted by xen to scheduler another VM?
>
Yes, that's the normal mode of operation. The hypervisor will timeslice
multiple vcpus onto a single vcpu.
This patch doesn't relate to that; it's whether a Xen Linux guest's
kernel can be preempted to reschedule processes while running under Xen.
The normal xen-unstable or vendor Xen kernels don't support this, but
the mainline kernel with paravirt_ops/xen support does.
J
WARNING: multiple messages have this Message-ID (diff)
From: Jeremy Fitzhardinge <jeremy@goop.org>
To: tgh <wwwwww4187@sina.com.cn>
Cc: Xen-devel <xen-devel@lists.xensource.com>,
Jeremy Fitzhardinge <jeremy@xensource.com>,
lkml <linux-kernel@vger.kernel.org>, Andi Kleen <ak@suse.de>,
Chris Wright <chrisw@sous-sol.org>,
Andrew Morton <akpm@linux-foundation.com>
Subject: Re: [patch 30/44] xen: Add support for preemption
Date: Tue, 30 Oct 2007 10:25:35 -0700 [thread overview]
Message-ID: <4727690F.4030502@goop.org> (raw)
In-Reply-To: <4726F51C.4030709@sina.com.cn>
tgh wrote:
> hi
> I am using xen,and I am curious about whether Xen support the preempt
> scheduler for the VMs or not
> could the VM be prempted by xen to scheduler another VM?
>
Yes, that's the normal mode of operation. The hypervisor will timeslice
multiple vcpus onto a single vcpu.
This patch doesn't relate to that; it's whether a Xen Linux guest's
kernel can be preempted to reschedule processes while running under Xen.
The normal xen-unstable or vendor Xen kernels don't support this, but
the mainline kernel with paravirt_ops/xen support does.
J
next prev parent reply other threads:[~2007-10-30 17:25 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20070716231536.937393000@xensource.com>
2007-07-16 23:15 ` [patch 01/44] add kstrndup Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 02/44] add argv_split() Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 03/44] usermodehelper: split setup from execution Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 04/44] Add common orderly_poweroff() Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 05/44] usermodehelper: Tidy up waiting Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 06/44] use elfnote.h to generate vsyscall notes Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 07/44] paravirt: add an "mm" argument to alloc_pt Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 08/44] paravirt: add a hook for once the allocator is ready Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 09/44] paravirt: increase IRQ limit Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 10/44] paravirt: unstatic leave_mm Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 11/44] paravirt: unstatic smp_store_cpu_info Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 12/44] paravirt: make siblingmap functions visible Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 13/44] paravirt: export __supported_pte_mask Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 14/44] Allocate and free vmalloc areas Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 15/44] paravirt: helper to disable all IO space Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 16/44] Add a sched_clock paravirt_op Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 17/44] Add nosegneg capability to the vsyscall page notes Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 18/44] xen: Add Xen interface header files Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 19/44] xen: Core Xen implementation Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 20/44] xen: virtual mmu Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 21/44] xen: event channels Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 22/44] xen: time implementation Jeremy Fitzhardinge
2007-07-16 23:15 ` [patch 23/44] xen: configuration Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 24/44] xen: add pinned page flag Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 25/44] xen: Complete pagetable pinning Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 26/44] xen: ignore RW mapping of RO pages in pagetable_init Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 27/44] xen: Account for stolen time Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 28/44] xen: Implement sched_clock Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 29/44] xen: SMP guest support Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 30/44] xen: Add support for preemption Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 31/44] xen: lazy-mmu operations Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 32/44] xen: hack to prevent bad segment register reload Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 33/44] xen: use the hvc console infrastructure for Xen console Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 34/44] xen: Add grant table support Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 35/44] xen: add the Xenbus sysfs and virtual device hotplug driver Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 36/44] xen: add virtual block device driver Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 37/44] xen: add virtual network " Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 38/44] xen: machine operations Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 39/44] xen: handle external requests for shutdown, reboot and sysrq Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 40/44] xen: Place vcpu_info structure into per-cpu memory Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 41/44] xen: Attempt to patch inline versions of common operations Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 42/44] xen: suppress abs symbol warnings for unused reloc pointers Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 43/44] xen: use iret directly when possible Jeremy Fitzhardinge
2007-07-16 23:16 ` [patch 44/44] xen: disable all non-virtual drivers Jeremy Fitzhardinge
[not found] ` <20070716232912.409821000@xensource.com>
2007-07-17 0:41 ` [Xen-devel] [patch 03/44] usermodehelper: split setup from execution Rusty Russell
2007-07-17 0:57 ` Jeremy Fitzhardinge
2007-07-17 0:57 ` Jeremy Fitzhardinge
[not found] ` <20070716232914.029797000@xensource.com>
2007-07-17 0:45 ` [Xen-devel] [patch 17/44] Add nosegneg capability to the vsyscall page notes Rusty Russell
2007-07-17 1:04 ` Jeremy Fitzhardinge
2007-07-17 1:04 ` Jeremy Fitzhardinge
[not found] ` <20070716232916.472694000@xensource.com>
2007-07-17 1:07 ` [patch 37/44] xen: add virtual network device driver Jeff Garzik
2007-07-17 8:45 ` Stephen Hemminger
2007-07-17 14:28 ` Jeremy Fitzhardinge
2007-07-17 23:45 ` Rusty Russell
2007-07-18 0:40 ` Jeremy Fitzhardinge
[not found] ` <20070716232915.672717000@xensource.com>
2007-10-30 9:10 ` [Xen-devel] [patch 30/44] xen: Add support for preemption tgh
2007-10-30 9:10 ` tgh
2007-10-30 17:25 ` Jeremy Fitzhardinge [this message]
2007-10-30 17:25 ` Jeremy Fitzhardinge
2007-10-31 1:23 ` [Xen-devel] " tgh
2007-10-31 1:23 ` tgh
2007-10-31 1:38 ` [Xen-devel] " Jeremy Fitzhardinge
2007-10-31 6:11 ` tgh
2007-10-31 6:11 ` tgh
2007-10-31 15:07 ` [Xen-devel] " Jeremy Fitzhardinge
2007-10-31 15:07 ` Jeremy Fitzhardinge
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