On Wed, 30 Jul 2008 22:48:42 +0530 Chirag Jog <chirag@xxxxxxxxxxxxxxxxxx> wrote: > * J?rgen Mell <j.mell@xxxxxxxxxxx> [2008-07-30 11:01:32]: > > > Hello Thomas, > > > > On Wednesday, 30. July 2008, Thomas Gleixner wrote: > > > We are pleased to announce the 2.6.26-rt1 tree, which can be > > > downloaded from the location: > > > > I have tried the new kernel and have some good news and some bad news: > > > > The good news: The machine boots and seems to run without major problems. > > > > The bad news: It produces continuously lots of bug messages in the error > > logs (cf. attached dmesg.tgz). The error at rtmutex.c:743 was already > > present in 2.6.25-rt* when ACPI was enabled. The 'using smp_processor_id > > () in preemptible code' is new here with 2.6.26. > > > > Machine is an old Athlon XP (single core) on an EPOX mainboard with VIA > > chipset. > > > > If I can help with testing, please let me know. > > > > Bye, > > Jürgen > > > > > This patch should solve some of the bug messages. > It does two things: > 1. Change rt_runtime_lock to be a raw spinlock as the comment above it > says: it is nested inside the rq lock. > > 2. Change mnt_writers to be a per_cpu locked variable. > This eliminates the need for the codepath to disable preemption and > then potentially sleep, leading to the BUG messages > > Signed-Off-By: Chirag <chirag@xxxxxxxxxxxxxxxxxx> Neat, the only remaining BUGs I see are from sock_prot_inuse_add() BUG: using smp_processor_id() in preemptible [00000000] code: arping/1916 caller is .sock_prot_inuse_add+0x30/0x80 Call Trace: [c0000000eed2f910] [c000000000010304] .show_stack+0x70/0x1bc (unreliable) [c0000000eed2f9c0] [c0000000001a2340] .debug_smp_processor_id+0x138/0x168 [c0000000eed2fa70] [c0000000002181f4] .sock_prot_inuse_add+0x30/0x80 [c0000000eed2fb10] [c00000000026d96c] .udp_lib_get_port+0x2a8/0x320 [c0000000eed2fbc0] [c000000000275b30] .inet_bind+0x168/0x248 [c0000000eed2fc60] [c000000000215024] .sys_bind+0x98/0xdc [c0000000eed2fd90] [c0000000002370bc] .compat_sys_socketcall+0xcc/0x214 [c0000000eed2fe30] [c0000000000086ac] syscall_exit+0x0/0x40 BUG: arping:1916 task might have lost a preemption check! Call Trace: [c0000000eed2f890] [c000000000010304] .show_stack+0x70/0x1bc (unreliable) [c0000000eed2f940] [c00000000004e298] .preempt_enable_no_resched+0x60/0x78 [c0000000eed2f9c0] [c0000000001a2348] .debug_smp_processor_id+0x140/0x168 [c0000000eed2fa70] [c0000000002181f4] .sock_prot_inuse_add+0x30/0x80 [c0000000eed2fb10] [c00000000026d96c] .udp_lib_get_port+0x2a8/0x320 [c0000000eed2fbc0] [c000000000275b30] .inet_bind+0x168/0x248 [c0000000eed2fc60] [c000000000215024] .sys_bind+0x98/0xdc [c0000000eed2fd90] [c0000000002370bc] .compat_sys_socketcall+0xcc/0x214 [c0000000eed2fe30] [c0000000000086ac] syscall_exit+0x0/0x40 ... Thanks, Sebastien. -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
