I have servers on Sun Fire v20z, kernel 2.6.15-r7, 64-bit mode, no preemption enabled, running 17 days. Today i have looked dmesg and so this message: [1425697.120532] BUG: soft lockup detected on CPU#0! [1425697.120536] CPU 0: [1425697.120539] Modules linked in: ipmi_devintf ipmi_si ipmi_msghandler iptable_mangle ipt_REDIRECT ipt_owner iptable_nat ip_nat ip_conntrack iptable_filter ip_tables tg3 [1425697.120549] Pid: 12774, comm: kipmi0 Not tainted 2.6.15-gentoo-r7 #3 [1425697.120552] RIP: 0010:[<ffffffff80347ed8>] <ffffffff80347ed8>{_spin_unlock_irqrestore+8} [1425697.120560] RSP: 0018:ffff810076aedef0 EFLAGS: 00000296 [1425697.120563] RAX: 0000000000000001 RBX: 0000000000000008 RCX: 000000006f55bc2f [1425697.120566] RDX: 0000000000000001 RSI: 0000000000000296 RDI: ffff810004eff024 [1425697.120569] RBP: 0000000000000246 R08: ffff810076aec000 R09: 0000000000000000 [1425697.120572] R10: 0000000000000008 R11: 0000000000000246 R12: ffffffff88046727 [1425697.120575] R13: ffff810076aedea8 R14: ffffffff88046554 R15: 0000000000000296 [1425697.120578] FS: 000000000090d040(0000) GS:ffffffff80475800(0000) knlGS:0000000000000000 [1425697.120581] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b [1425697.120583] CR2: 000000000050c230 CR3: 0000000041c95000 CR4: 00000000000006e0 [1425697.120585] [1425697.120586] Call Trace:<ffffffff880448d8>{:ipmi_si:ipmi_thread+72} <ffffffff88044890>{:ipmi_si:ipmi_thread+0} [1425697.120605] <ffffffff80149e09>{kthread+217} <ffffffff8010e7d6>{child_rip+8} [1425697.120614] <ffffffff80149e50>{keventd_create_kthread+0} <ffffffff80149d30>{kthread+0} [1425697.120621] <ffffffff8010e7ce>{child_rip+0} Possible there is soft-lockup issue on that code/module. If you can find something, it's good, if not - it doesn't matter, worst thing, i cannot turn on debugging or smth like this, cause server is heavily loaded.
You should really try w/ latest available version before reporting bugs.
HQ-PROXY-30 ~ # emerge --sync;emerge search gentoo-sources ..... * sys-kernel/gentoo-sources Latest version available: 2.6.15-r7 Latest version installed: 2.6.15-r7 Size of downloaded files: 117,370 kB Homepage: http://dev.gentoo.org/~dsd/genpatches Description: Full sources including the gentoo patchset for the 2.6 kernel tree License: GPL-2 It is already latest stable kernel for amd64 in portage
Are you able to test the latest testing/development kernels? Currently 2.6.16 and 2.6.17-rc2
If you are able to do further testing, please reopen this bug.