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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] architecture-specific stuff in xend
I tried the patch on an ia64 box and it seemed to work just fine, I
think it's a great idea.
On Thu, 2006-08-10 at 16:12 -0500, Hollis Blanchard wrote:
> On Wed, 2006-08-09 at 17:18 +0100, Ewan Mellor wrote:
> >
> > Yes, your proposal sounds fine to me.
>
> OK, here is the first proof-of-concept.
>
> IA64 and HVM people will definitely need to check this over, because it
> looks like there was some *serious* bitrot in this area. (For example, I
> can't see how an HVM domain would have made it into class ImageHandler
> in the first place.)
>
> John, would you extend this scheme to cover host OS differences? I think
> it's worth separating the attributes of the host and the guest, and this
> patch below is all about guest stuff. W.R.T.
> tools/python/xen/util/Brctl.py, wouldn't it make more sense to replace
> that file entirely depending on the host OS?
>
>
>
> [XEND] Abstract architecture-specific guest code into a module.
> Signed-off-by: Hollis Blanchard <hollisb@xxxxxxxxxx>
>
> diff -r 8cca42e2610a tools/python/xen/xend/XendDomainInfo.py
> --- a/tools/python/xen/xend/XendDomainInfo.py Thu Aug 10 14:29:04 2006 +0100
> +++ b/tools/python/xen/xend/XendDomainInfo.py Thu Aug 10 15:45:00 2006 -0500
> @@ -1279,23 +1279,14 @@ class XendDomainInfo:
> cpu = [ int( cpus[v % len(cpus)] ) ]
> xc.vcpu_setaffinity(self.domid, v, cpu)
>
> - # set domain maxmem in KiB
> - xc.domain_setmaxmem(self.domid, self.info['maxmem'] * 1024)
> -
> - m = self.image.getDomainMemory(self.info['memory'] * 1024)
> - balloon.free(m)
> -
> - init_reservation = self.info['memory'] * 1024
> - if os.uname()[4] in ('ia64', 'ppc64'):
> - # Workaround for architectures that don't yet support
> - # ballooning.
> - init_reservation = m
> - # Following line from xiantao.zhang@xxxxxxxxx
> - # Needed for IA64 until supports ballooning -- okay for
> PPC64?
> - xc.domain_setmaxmem(self.domid, m)
> -
> - xc.domain_memory_increase_reservation(self.domid,
> init_reservation,
> - 0, 0)
> + # set memory limit
> + maxmem = self.image.getRequiredMemory(self.info['maxmem'] * 1024)
> + xc.domain_setmaxmem(self.domid, maxmem)
> +
> + # initial memory allocation
> + mem_kb = self.image.getRequiredMemory(self.info['memory'] * 1024)
> + balloon.free(mem_kb)
> + xc.domain_memory_increase_reservation(self.domid, mem_kb, 0, 0)
>
> self.createChannels()
>
> diff -r 8cca42e2610a tools/python/xen/xend/image.py
> --- a/tools/python/xen/xend/image.py Thu Aug 10 14:29:04 2006 +0100
> +++ b/tools/python/xen/xend/image.py Thu Aug 10 15:45:21 2006 -0500
> @@ -27,6 +27,7 @@ from xen.xend.XendLogging import log
> from xen.xend.XendLogging import log
> from xen.xend.server.netif import randomMAC
> from xen.xend.xenstore.xswatch import xswatch
> +from xen.xend import arch
>
>
> xc = xen.lowlevel.xc.xc()
> @@ -141,17 +142,8 @@ class ImageHandler:
> raise VmError('Building domain failed: ostype=%s dom=%d err=%s'
> % (self.ostype, self.vm.getDomid(), str(result)))
>
> -
> - def getDomainMemory(self, mem_kb):
> - """@return The memory required, in KiB, by the domain to store the
> - given amount, also in KiB."""
> - if os.uname()[4] != 'ia64':
> - # A little extra because auto-ballooning is broken w.r.t. HVM
> - # guests. Also, slack is necessary for live migration since that
> - # uses shadow page tables.
> - if 'hvm' in xc.xeninfo()['xen_caps']:
> - mem_kb += 4*1024;
> - return mem_kb
> + def getRequiredMemory(self, domain_kb):
> + return domain_kb
>
> def buildDomain(self):
> """Build the domain. Define in subclass."""
> @@ -349,20 +341,8 @@ class HVMImageHandler(ImageHandler):
> os.waitpid(self.pid, 0)
> self.pid = 0
>
> - def getDomainMemory(self, mem_kb):
> - """@see ImageHandler.getDomainMemory"""
> - if os.uname()[4] == 'ia64':
> - page_kb = 16
> - # ROM size for guest firmware, ioreq page and xenstore page
> - extra_pages = 1024 + 2
> - else:
> - page_kb = 4
> - # This was derived emperically:
> - # 2.4 MB overhead per 1024 MB RAM + 8 MB constant
> - # + 4 to avoid low-memory condition
> - extra_mb = (2.4/1024) * (mem_kb/1024.0) + 12;
> - extra_pages = int( math.ceil( extra_mb*1024 / page_kb ))
> - return mem_kb + extra_pages * page_kb
> + def getRequiredMemory(self, domain_kb):
> + return arch.HVMRequiredMemory(domain_kb)
>
> def register_shutdown_watch(self):
> """ add xen store watch on control/shutdown """
> diff -r 8cca42e2610a tools/python/xen/xend/arch/__init__.py
> --- /dev/null Thu Jan 01 00:00:00 1970 +0000
> +++ b/tools/python/xen/xend/arch/__init__.py Thu Aug 10 15:18:58 2006 -0500
> @@ -0,0 +1,28 @@
> +#!/usr/bin/env python
> +#
> +# This library is free software; you can redistribute it and/or
> +# modify it under the terms of version 2.1 of the GNU Lesser General Public
> +# License as published by the Free Software Foundation.
> +#
> +# This library is distributed in the hope that it will be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> +# Lesser General Public License for more details.
> +#
> +# You should have received a copy of the GNU Lesser General Public
> +# License along with this library; if not, write to the Free Software
> +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> +#
> +# Copyright (C) IBM Corp. 2006
> +#
> +# Authors: Hollis Blanchard <hollisb@xxxxxxxxxx>
> +
> +import os
> +
> +_uname = os.uname()[4]
> +if _uname in ("i386", "i486", "i586", "i686"):
> + from x86 import *
> +elif _uname in ("ia64"):
> + from ia64 import *
> +elif _uname in ("ppc", "ppc64"):
> + from powerpc import *
> diff -r 8cca42e2610a tools/python/xen/xend/arch/ia64.py
> --- /dev/null Thu Jan 01 00:00:00 1970 +0000
> +++ b/tools/python/xen/xend/arch/ia64.py Thu Aug 10 15:45:08 2006 -0500
> @@ -0,0 +1,24 @@
> +#!/usr/bin/env python
> +#
> +# This library is free software; you can redistribute it and/or
> +# modify it under the terms of version 2.1 of the GNU Lesser General Public
> +# License as published by the Free Software Foundation.
> +#
> +# This library is distributed in the hope that it will be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> +# Lesser General Public License for more details.
> +#
> +# You should have received a copy of the GNU Lesser General Public
> +# License along with this library; if not, write to the Free Software
> +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> +#
> +# Copyright (C) IBM Corp. 2006
> +#
> +# Authors: Hollis Blanchard <hollisb@xxxxxxxxxx>
> +
> +def HVMRequiredMemory(mem_kb):
> + page_kb = 16
> + # ROM size for guest firmware, ioreq page and xenstore page
> + extra_pages = 1024 + 2
> + return mem_kb + extra_pages * page_kb
> diff -r 8cca42e2610a tools/python/xen/xend/arch/x86.py
> --- /dev/null Thu Jan 01 00:00:00 1970 +0000
> +++ b/tools/python/xen/xend/arch/x86.py Thu Aug 10 15:45:13 2006 -0500
> @@ -0,0 +1,27 @@
> +#!/usr/bin/env python
> +#
> +# This library is free software; you can redistribute it and/or
> +# modify it under the terms of version 2.1 of the GNU Lesser General Public
> +# License as published by the Free Software Foundation.
> +#
> +# This library is distributed in the hope that it will be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> +# Lesser General Public License for more details.
> +#
> +# You should have received a copy of the GNU Lesser General Public
> +# License along with this library; if not, write to the Free Software
> +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> +#
> +# Copyright (C) IBM Corp. 2006
> +#
> +# Authors: Hollis Blanchard <hollisb@xxxxxxxxxx>
> +
> +def HVMRequiredMemory(mem_kb):
> + page_kb = 4
> + # This was derived emperically:
> + # 2.4 MB overhead per 1024 MB RAM + 8 MB constant
> + # + 4 to avoid low-memory condition
> + extra_mb = (2.4/1024) * (mem_kb/1024.0) + 12;
> + extra_pages = int( math.ceil( extra_mb*1024 / page_kb ))
> + return mem_kb + extra_pages * page_kb
>
>
>
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