Hi all, I'm again bringing up the network on my simulator, and I've found that if I run with more than one CPU in my simulation (if I have CONFIG_SMP enabled), synchronize_rcu() just hangs, as I never get a cpu_quiet() call. I've attached boot log chunks from various parts of boot time to the bottom of this mail. I'm curious as to whether the fault is in my emulator, or in the kernel, or in my additions to the kernel... On IRC, Ralf initially suggested that it could be an emulator fault, but I'm not sure where such a fault would be. Thanks, joshua Here is how a good boot looks: lan-lan.c 0.01: Joshua Wise <Joshua.Wise@xxxxxxxxxxxx> emu0: lan-lan found at 0xef0000000. emu0: loaded successfully NET: Registered protocol family 2 Sock_register done Base protocols done Socketside stuff done inet_register_protosw(80343aa0) spinlock: inetsw lock got it list done spin unlock synchronize net net synch: Synchronizing RCU... Calling... Waiting... CPU quiet: 0 Awake Done! net synch done ok inet_register_protosw(80343ad0) spinlock: inetsw lock got it list done However, a failing boot looks like this: Starting CPU #1... CPU revision is: 00018101 FPU revision is: 00038110 Primary instruction cache 32kB, physically tagged, 2-way, linesize 32 bytes. Primary data cache 32kB, 2-way, linesize 32 bytes. Synthesized TLB refill handler (36 instructions). CPU frequency 8.00 MHz CPU #1 init complete. Brought up 2 CPUs checking if image is initramfs...it isn't (bad gzip magic numbers); looks like an initrd Freeing initrd memory: 4096k freed NET: Registered protocol family 16 CPU quiet: 0 rtc: IRQ 8 is not free. i8042.c: i8042 controller self test timeout. Trying to free nonexistent resource <00000060-0000006f> Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing disabled ttyS0 at MMIO 0x0 (irq = 2) is a 16450 ttyS1 at I/O 0x2f8 (irq = 3) is a 16450 ttyS2 at I/O 0x3e8 (irq = 4) is a 16450 io scheduler noop registered io scheduler anticipatory registered io scheduler deadline registered io scheduler cfq registered RAMDISK driver initialized: 16 RAM disks of 18432K size 1024 blocksize loop: loaded (max 8 devices) lan-lan.c 0.01: Joshua Wise <Joshua.Wise@xxxxxxxxxxxx> emu0: lan-lan found at 0xef0000000. emu0: loaded successfully NET: Registered protocol family 2 Sock_register done Base protocols done Socketside stuff done inet_register_protosw(80343aa0) spinlock: inetsw lock got it list done spin unlock synchronize net net synch: Synchronizing RCU... Calling... Waiting... <hang>
