Hi,
If you're running Debian testing (squeeze) then you may have noticed
complaints from the install scripts of udev saying that your kernel
still has CONFIG_DEPRECATED_SYSFS enabled and you need to turn it
off before upgrading udev.
Don't force udev to be upgraded if this happens to you. It *will*
result in an unbootable system.
You can instead switch to the upstream kernel package which now has
support for running under Xen. The package you want is
linux-image-2.6.32-trunk-686-bigmem.
Before booting though, check some other things. Firstly, be sure
that you haven't upgraded to grub 2 (the current version of the
grub-pc package in testing is grub 2). The config format is not yet
supported by pygrub which BitFolk uses, so you would end up getting
the old kernel list from your /boot/grub/menu.lst. Instead make
sure you have grub-legacy for now. Run "update-grub" to see which
kernels it finds.
Next, the upstream kernels don't need the clocksource=jiffies kernel
command line any more either. In fact it can make things break. So
check in your menu.lst that that isn't there. Do an update-grub if
you changed anything.
After booting into 2.6.32-trunk-686-bigmem you can safely upgrade
udev.
Cheers,
Andy
--
http://bitfolk.com/ -- No-nonsense VPS hosting
A bit of help with finding the right command please.
What I'm after doing is a bit of video transcoding on a 4 times a year
basis, I realise this is CPU intensive and would like to be a good
neighbour to the others who are on the same physical box as me.
How do I run a command in low priority mode?
In case the flavour of linux matters I'm on Ubuntu.
Hello,
Recently my VPS has begun performing certain IO intensive operations
notable slower, in some cases maildirs that can take less than a second
to open under ideal circumstances have been taking up to a minute to
load. I am told by Andy that iowait on the host server (barbar) is not
high at the moment, so it is likely to be something to do with the VPS
itself.
Can anyone suggest any diagnostic measures I can take to identify where
the performance issue is? I have never had to deal with such a
situation before, and Google is not offering a significant amount of
guidance.
Thanks,
Robert
Hi there
I'm running Ubuntu 8.04 on the VPS (image provided by Bitfolk) and periodically the VPS seems to lock up and I get the following scrolling really fast on the console:
[1366226.746076] =======================
[1366238.351907] BUG: soft lockup - CPU#0 stuck for 11s! [apache2:27046]
[1366238.351920]
[1366238.351925] Pid: 27046, comm: apache2 Tainted: G D (2.6.24-24-xen #1)
[1366238.351929] EIP: 0061:[<c03285fa>] EFLAGS: 00200286 CPU: 0
[1366238.351938] EIP is at _spin_lock+0xa/0x10
[1366238.351940] EAX: d6002dd8 EBX: d6002d94 ECX: c156a9c0 EDX: 00000000
[1366238.351943] ESI: c156a9c0 EDI: 00000000 EBP: d4a4bdd8 ESP: d4a4bc3c
[1366238.351946] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0069
[1366238.351954] CR0: 80050033 CR2: 08e080c8 CR3: 04d26000 CR4: 00002620
[1366238.351958] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[1366238.351961] DR6: ffff0ff0 DR7: 00000400
[1366238.351965] [<c01a6ebd>] try_to_free_buffers+0x2d/0x90
[1366238.351978] [<c0167c75>] shrink_page_list+0x4c5/0x600
[1366238.351985] [<c0166e0f>] isolate_lru_pages+0x5f/0x1c0
[1366238.351991] [<c0167ecf>] shrink_inactive_list+0x11f/0x3b0
[1366238.351998] [<c01681fc>] shrink_zone+0x9c/0x100
[1366238.352002] [<c0168d42>] try_to_free_pages+0x152/0x250
[1366238.352008] [<c0162f9b>] __alloc_pages+0x14b/0x390
[1366238.352013] [<c011959c>] kmap_atomic+0x1c/0x30
[1366238.352020] [<c01713dc>] handle_mm_fault+0x8ac/0x1360
[1366238.352025] [<c0164cf2>] test_clear_page_writeback+0x72/0x100
[1366238.352030] [<c0275361>] __add_entropy_words+0x61/0x1f0
[1366238.352037] [<c011e34e>] __wake_up+0x3e/0x60
[1366238.352042] [<c027571b>] add_timer_randomness+0xdb/0x190
[1366238.352047] [<c032a18e>] do_page_fault+0x35e/0xe70
[1366238.352052] [<c01581d1>] handle_IRQ_event+0x41/0x80
[1366238.352056] [<c0159ad6>] handle_level_irq+0xb6/0xf0
[1366238.352061] [<c0254290>] evtchn_do_upcall+0xc0/0x1a0
[1366238.352067] [<c0329e30>] do_page_fault+0x0/0xe70
[1366238.352071] [<c0328ad5>] error_code+0x35/0x40
[1366238.352077] =======================
I've increased the swapfile size to 1GB as I noticed we were using it pretty heavily. The VPS runs a couple of websites, backed by MySQL.
Any ideas?
Alex
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