1 Feb
2010
1 Feb
'10
2:07 p.m.
Hi,
I'd say apache pid 27046 is waiting for IO after it requested more
memory and the kernel trying to free some by utilising swap.
After 11 seconds (of doing IO) it complained.
_If_ my analysis is correct, you'd have the following Options:
* add more ram
* reduce amount of ram required
* increase IO Speed (new kernel/drivers/etc..)
I wouldn't expect the increase in swapspace to solve it. *Perhaps*
lessen the frequency of this to happen though.
Conrad
On Mon, 2010-02-01 at 08:11 +0000, Alex Harrington wrote:
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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