Displaying 20 results from an estimated 621 matches for "pagetables".
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pagetable
2007 Oct 16
8
Xeno Linux never pins L1 tables ?
hi,
I''m developing my own 32-bit (no PAE) paravirtualized kernel for xen with
Mini-OS as a starting point. I am currently working on process page table
support (equivalent of arch/i386/mm/pgtable-xen.c) and mostly following
Linux for the moment. I noticed that linux-2.6.18-xen never pins an L1 table
(a pte), yet __pgd_pin() walks the page directory and gives up write access
on the kernel
2007 Jun 13
15
page table question!
I want to know any difference between writing, reading and shadow page
table (for example performance).
I am thankful for any help or resource for that.
--
Best Regards
Mohamad Taghi Mir Mohamad Rezaie
Iran University of Science and Technology
Department of Computer Science & Engineering
System Software Group
_______________________________________________
Xen-devel mailing list
2007 Nov 28
20
Page tables in Xen
Hi,
I have a question about memory page tables in Xen. As far as I
understood, every modification
to page table will go through Xen(hypervisor). Is it so that all page
tables are actually allocated
in Xen(hypervisor) instead of guest OS(domain)? Also, is it the case
that Xen(hypervisor) needs to
maintain a page table for each process running in every domain?
Thanks
Haifeng
2007 Nov 15
0
[patch 12/19] xen: deal with stale cr3 values when unpinning pagetables
-stable review patch. If anyone has any objections, please let us know.
------------------
From: Jeremy Fitzhardinge <jeremy@goop.org>
patch 9f79991d4186089e228274196413572cc000143b in mainline.
When a pagetable is no longer in use, it must be unpinned so that its
pages can be freed. However, this is only possible if there are no
stray uses of the pagetable. The code currently deals
2007 Nov 15
0
[patch 12/19] xen: deal with stale cr3 values when unpinning pagetables
-stable review patch. If anyone has any objections, please let us know.
------------------
From: Jeremy Fitzhardinge <jeremy@goop.org>
patch 9f79991d4186089e228274196413572cc000143b in mainline.
When a pagetable is no longer in use, it must be unpinned so that its
pages can be freed. However, this is only possible if there are no
stray uses of the pagetable. The code currently deals
2011 Feb 21
5
How to create shadow page table of my own?
Hi, guys
Recently I have been doing some research & I''ve got in trouble.
I have altered the kernel of domU and put the code section and data section of selinux security server which locate ~/security/selinux/ss into two seperate sections in the final vmlinux image(see below)
objdump -h vmlinux
vmlinux: file format elf32-i386
Sections:
Idx Name Size VMA
2009 Jan 30
0
[PATCH 2/2] amd-iommu: drop locks before printing error messages
Signed-off-by: Jan Beulich <jbeulich@novell.com>
--- 2009-01-27.orig/xen/drivers/passthrough/amd/iommu_map.c 2009-01-30 08:43:35.000000000 +0100
+++ 2009-01-27/xen/drivers/passthrough/amd/iommu_map.c 2009-01-30 08:46:29.000000000 +0100
@@ -461,8 +461,8 @@ int amd_iommu_map_page(struct domain *d,
iommu_l2e = iommu_l2e_from_pfn(hd->root_table, hd->paging_mode, gfn);
if (
2007 Jun 06
2
"Bad type" when setting PML4 on x86_64
...000010000 000 180 000 010)
vm_enter:895: about to instantiate new maps pml4=0x6000010000
vm_enter:901: Using physical pml4 0x13091000 for Xen
(XEN) mm.c:1664:d72 Bad type (saw 00000000e8000001 != exp 0000000080000000) for
mfn 13091 (pfn 10)
(XEN) mm.c:1724:d72 New baseptr 13091: slow path via idle pagetables
(XEN) mm.c:1664:d72 Bad type (saw 00000000e8000001 != exp 0000000080000000) for
mfn 13091 (pfn 10)
(XEN) mm.c:1737:d72 Fatal error while installing new baseptr 13091
I''ve tried both with and without the writable page tables turned on
with vm_assist. Is there something that I am missing?...
2008 Dec 11
4
paging and shadow paging in xen: trying to implement split memory
Hi all,
I''ve been reading through the code regarding paging --> spending a lot of
time in mm/*.*, as well as some of the other parts up a level or two, but
I''m still unclear as to some key things.
Here''s what I think I know:
I think I know how a domain''s shadow page table is first allocated E.G. the
hash_table is xmalloc''ed and when it is
2007 Dec 07
9
Question about implementation of 32-bit guests on 64-bit hypervisor (IDT-related)
In a recent conversation one of my coworkers raised a concern about
memory limitations when running 32-bit guests on top of the 64-bit
hypervisor. At this point the discussion is academic; I don''t know
when/if we''ll ever be able to get system resources to test it, to see if
the concerns that he expressed are real. So I decided to post this in
hope of getting comments from the
2009 Apr 22
7
Consult some concepts about shadow paging mechanism
Dear All:
I am pretty new to xen-devel, please correct me in the following.
Assume we have the following terms
GPT: guest page table
SPT: shadow page table
(Question a) When guest OS is running, is it always using SPT for
address translation? If it is the case, how does guest OS refer and
modify its own GPT content? It seems that there is a page table entry
in SPT for the GPT page.
(Question
2009 Aug 26
6
can dom0 modify Shadow PT of HVM domU?
Hi all,
Can Xen hypervisor modify HVM domU's Shadow page table, under the dom0's context, like trapped from dom0's hypercall?
I think it have to call 2 functions at least: guest_walk_tables() and flush_tlb_all(). Can these 2 functions called in dom0's context?
In my test, if hypervisor tries to modify HVM's shadow page table, it will bring down the whole system. I am not
2006 Jul 27
0
[PATCH] clear MPT l2 entries when allocating monitor pagetable
clear MPT l2 entries when allocating monitor pagetable
Changeset 10734 removed the code clearing MPT l2 entries, however these
entries are stained when copying from idle_pg_table_l2.
Signed-off-by: Xin Li <xin.b.li@intel.com>
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2011 May 13
3
XEN Dom 0 boot and Out of Memory issue
...: 186, btch: 31 usd: 0
CPU 1: hi: 186, btch: 31 usd: 0
active_anon:5831 inactive_anon:2 isolated_anon:0
active_file:3833 inactive_file:57589 isolated_file:0
unevictable:1124 dirty:99 writeback:0 unstable:0
free:283729 slab_reclaimable:4785 slab_unreclaimable:2380
mapped:3362 shmem:36 pagetables:1029 bounce:0
Node 0 DMA free:12904kB min:32kB low:40kB high:48kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:12712kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimabl...
2007 Oct 12
10
[PATCH 00/10] REVIEW: Xen patches for 2.6.24
This is my current set of updates to Xen for 2.6.24. This is largely
a bugfix set, and a couple of them are also relevent to 2.6.23.
These are in the pre-x86 merge form; I'll update them once the merge
goes into git.
Quick overview:
- remove some dead code in arch/i386/mm/init.c
- clean up some duplicate includes
- when sending an IPI, yield the vcpu if the destination doesn't have
2007 Oct 12
10
[PATCH 00/10] REVIEW: Xen patches for 2.6.24
This is my current set of updates to Xen for 2.6.24. This is largely
a bugfix set, and a couple of them are also relevent to 2.6.23.
These are in the pre-x86 merge form; I'll update them once the merge
goes into git.
Quick overview:
- remove some dead code in arch/i386/mm/init.c
- clean up some duplicate includes
- when sending an IPI, yield the vcpu if the destination doesn't have
2007 Oct 12
10
[PATCH 00/10] REVIEW: Xen patches for 2.6.24
This is my current set of updates to Xen for 2.6.24. This is largely
a bugfix set, and a couple of them are also relevent to 2.6.23.
These are in the pre-x86 merge form; I'll update them once the merge
goes into git.
Quick overview:
- remove some dead code in arch/i386/mm/init.c
- clean up some duplicate includes
- when sending an IPI, yield the vcpu if the destination doesn't have
2007 Feb 15
2
Mapping foreign frames from dom0
Hello,
I am hacking on a Mini-OS that is able to run as domain 0 and is able to
start a guest (another Mini-OS for now). I was able to get a memory
allocated to the guest and am now trying to build its pagetable and
after that copy the kernel to the right places. The problem is:
Given a machine frame number from a memory frame of the guest, how do I
conceptionally map this into
2006 Jul 25
18
[PATCH] turn off writable page tables
At OLS I gave a talk on some of the Xen scalability inhibitors, and one
of these was writable page tables. We went over why the feature does
not scale, but just as important, we found that the uniprocessor case
does not provide any advantage either. These tests were done on x86_64,
so I wanted to run the 1-way test on 32 bit to show the same problem.
So, I have run with writable PTs and
2005 Apr 30
4
[PATCH] disable writable pagetables on FreeBSD
...le page tables. In the short-term I''m more interested in
functionality than performance. This patch disables them and fixes a
compile issue.
# This is a BitKeeper generated diff -Nru style patch.
#
# ChangeSet
# 2005/04/29 19:26:00-07:00 kmacy@curly.lab.netapp.com
# disable writable pagetables + compile fix
# Signed-off-by: Kip Macy <kmacy@fsmware.com>
#
# freebsd-5.3-xen-sparse/i386-xen/include/xenpmap.h
# 2005/04/29 19:25:58-07:00 kmacy@curly.lab.netapp.com +5 -3
# disable writable pagetables + compile fix
#
diff -Nru a/freebsd-5.3-xen-sparse/i386-xen/include/xenpmap.h
b...