[arch-dev-public] Fwd: a kernel26-xen bug?

Tobias Powalowski t.powa at gmx.de
Wed Aug 11 12:10:35 EDT 2010

----------  Weitergeleitete Nachricht  ----------

Betreff: a kernel26-xen bug?
Datum: Sonntag 08 August 2010, 23:21:49
Von: VPSee <vpseecom at gmail.com>
An:  tpowa at archlinux.org
Kopie:  thomas at archlinux.org, raczkow at gmail.com

Hi, I followed a guide to build a xen domu kernel for archlinux VPS:
# makepkg --asroot
# pacman -U kernel26-xen-
# pacman -U kernel26-xen-headers-

It's all fine, my i686 new kernel can run without a problem. The problem I
found is that when I tried to increase the archlinux domu's memory to
1024MB, the new domu only accept 726048k:
top - 19:23:40 up 28 min,  1 user,  load average: 0.00, 0.01, 0.00
Tasks:  41 total,   1 running,  40 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,
Mem:    726048k total,   192192k used,   533856k free,    11108k buffers
Swap:        0k total,        0k used,        0k free,   160220k cached

If I do "xm mem-set archlinux 512", the archlinux domu can decrease the
memory to 512mb without a problem. If I do "xm mem-set archlinux 1024", the
domu can only take 726048k. my xen configuration file for the domu is:
name = "arch"
bootloader = "/usr/bin/pygrub"
vcpus = 2
maxmem = "1024"
memory = "1024"

I also get the same report from other users who are using our archlinux VPS.
It's a strange problem. I first thought it's a 64/32bit mixed kernel and
userland problem. Can you please give me a hint?



Tobias Powalowski
Archlinux Developer & Package Maintainer (tpowa)
tpowa at archlinux.org
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