 Home |
Products |
Support |
Community |
News |
xen-devel
[Xen-devel] Linux question, user space virtual mem layout
| To: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Linux question, user space virtual mem layout |
| From: | Jacob Gorm Hansen <jacobg@xxxxxxx> |
| Date: | Fri, 08 Apr 2005 19:26:10 -0700 |
| Delivery-date: | Sat, 09 Apr 2005 02:26:12 +0000 |
| Envelope-to: | www-data@xxxxxxxxxxxxxxxxxxx |
| List-help: | <mailto:xen-devel-request@lists.xensource.com?subject=help> |
| List-id: | Xen developer discussion <xen-devel.lists.xensource.com> |
| List-post: | <mailto:xen-devel@lists.xensource.com> |
| List-subscribe: | <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe> |
| List-unsubscribe: | <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe> |
| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
| User-agent: | Mozilla Thunderbird 1.0 (X11/20050302) |
hi,I am trying to allow dom0 to be mapped permanently in the top parts of all domU address spaces, to save some TLB flushes when doing I/O (on x86-32) and see how much that helps performance. So far I have managed to get the dom0 kernel, and a relinked user space, to live between 0xf0000000 and 0xfc000000 where Xen starts. But I have the problem that even though me user-space binaries are linked to reside in the 0xf0000000 -> 0xf6000000 virtual area, mmap() in Linux still likes to create mappings below 0xf0000000. Can anyone on this list tell me how I can instruct Linux not to go below a certain address when dealing out virtual mappings to user-space? Thanks in advance, Jacob _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | Re: [Xen-devel] bug: chk fails to check for iproute tools, Steve Traugott |
|---|---|
| Next by Date: | Re: [Xen-devel] Linux question, user space virtual mem layout, Jacob Gorm Hansen |
| Previous by Thread: | RE: BK question Re: [Xen-devel] BUG at domain.c:144, Ian Pratt |
| Next by Thread: | Re: [Xen-devel] Linux question, user space virtual mem layout, Jacob Gorm Hansen |
| Indexes: | [Date] [Thread] [Top] [All Lists] |
