Messages in this thread | | | Date | Mon, 3 Mar 2008 17:02:35 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH 2/2] x86_64: Cleanup non-smp usage of cpu maps v3 |
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On Tue, 19 Feb 2008 12:33:37 -0800 Mike Travis <travis@sgi.com> wrote:
> Cleanup references to the early cpu maps for the non-SMP configuration > and remove some functions called for SMP configurations only. > > Based on git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git >
My 8-way x86_64 box is crashing with this patch series applied.
Quite late in boot, when modules are being loaded:
SELinux: initialized (dev rootfs, type rootfs), uses genfs_contexts SELinux: initialized (dev sysfs, type sysfs), uses genfs_contexts SELinux: policy loaded with handle_unknown=deny type=1403 audit(1204590434.779:3): policy loaded auid=4294967295 ses=4294967295 BUG: unable to handle kernel paging request at ffff80ff81959078 IP: [<ffffffff8025062d>] sys_init_module+0x135e/0x1a24 PGD 0 Oops: 0002 [1] SMP last sysfs file: /sys/devices/pnp0/00:17/id CPU 7 Modules linked in: dm_mirror dm_multipath dm_mod sbs sbshc dock battery ac parport_pc lp parport snd_hda_intel snd_seq_dummy snd_seq_oss snd_seq_midi_event floppy snd_seq snd_seq_device snd_pcm_oss sg snd_mixer_oss snd_pcm serio_raw ide_cd_mod cdrom snd_timer shpchp snd soundcore snd_page_alloc button pcspkr i2c_i801 i2c_core ehci_hcd ohci_hcd uhci_hcd Pid: 2969, comm: modprobe Not tainted 2.6.25-rc3-mm1 #9 RIP: 0010:[<ffffffff8025062d>] [<ffffffff8025062d>] sys_init_module+0x135e/0x1a24 RSP: 0018:ffff81025a50de08 EFLAGS: 00010287 RAX: ffff810001004000 RBX: 000000000000001c RCX: 000000000000001c RDX: 0000000000000000 RSI: ffffc20001b281b0 RDI: ffff80ff81959078 RBP: ffffc20001b281b0 R08: 0000000000000000 R09: ffffc20001e8d800 R10: ffffc20001e6d818 R11: 0000000000000002 R12: ffffffffa0300900 R13: ffffc20001e6cfd8 R14: ffffffff80955078 R15: ffffc20001af3000 FS: 00007f50a14066f0(0000) GS:ffff81000107b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: ffff80ff81959078 CR3: 000000025b565000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process modprobe (pid: 2969, threadinfo ffff81025a50c000, task ffff81025dbbf380) Stack: 0000000000000000 00000000006180e0 ffffc20001e6dd98 ffffc20001e6d7d8 ffffc20001e6dd58 ffff81025b4f2e20 ffffc200021aef80 0000000000000036 0000000f00000000 0000000a00000000 0000000d00000011 0000000000000000 Call Trace: [<ffffffff80454696>] ? neigh_lookup+0x0/0xc0 [<ffffffff80310ca7>] ? selinux_file_permission+0x54/0x127 [<ffffffff8028cc93>] ? vfs_read+0xa8/0x131 [<ffffffff8020bceb>] ? system_call_after_swapgs+0x7b/0x80
Code: 48 8b 58 20 48 8b 68 10 e8 ad 1b 0e 00 eb 2d 48 8b 05 70 56 5f 00 49 63 d0 4c 89 f7 fc 48 89 ee 48 89 d9 48 8b 04 d0 48 03 78 08 <f3> a4 48 c7 c6 40 d7 96 80 44 89 c7 e8 98 1b 0e 00 3d fe 00 00 RIP [<ffffffff8025062d>] sys_init_module+0x135e/0x1a24 RSP <ffff81025a50de08> CR2: ffff80ff81959078 ---[ end trace d72a6bcf35cfd5e6 ]---
In percpu_modcopy():
(gdb) l *0xffffffff8025062d 0xffffffff8025062d is in sys_init_module (kernel/module.c:436). 431 static void percpu_modcopy(void *pcpudest, const void *from, unsigned long size) 432 { 433 int cpu; 434 435 for_each_possible_cpu(cpu) 436 memcpy(pcpudest + per_cpu_offset(cpu), from, size); 437 } 438 439 static int percpu_modinit(void) 440 {
Full boot log: http://userweb.kernel.org/~akpm/dmesg-akpm2.txt
.config: http://userweb.kernel.org/~akpm/config-akpm2.txt
I was unable to bisect it more finely than this:
init-move-setup-of-nr_cpu_ids-to-as-early-as-possible-v3.patch generic-percpu-infrastructure-to-rebase-the-per-cpu-area-to-zero-v3.patch OK x86_64-fold-pda-into-per-cpu-area-v3.patch x86_64-fold-pda-into-per-cpu-area-v3-fix.patch x86_64-cleanup-non-smp-usage-of-cpu-maps-v3.patch BAD
because when x86_64-cleanup-non-smp-usage-of-cpu-maps-v3.patch was removed the machine hung quite early, when playing around with TSC calibration I think.
I'll drop 'em.
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