Re: 2.6.20-mm2

Rafael J. Wysocki
2007-02-18T23:31:07Z

On Sunday, 18 February 2007 20:43, Andrew Morton wrote:
> On Sun, 18 Feb 2007 13:44:54 +0100 "Rafael J. Wysocki" <rjw@sisk.pl> wrote:
>
> > On Sunday, 18 February 2007 06:51, Andrew Morton wrote:
> > >
> > > Temporarily at
> > >
> > > http://userweb.kernel.org/~akpm/2.6.20-mm2/
> > >
> > > Will appear later at
> > >
> > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.20/2.6.20-mm2/
> >
> > Two problems:
> >
> > 1) A showstopper with the root partition on RAID1:
> >
> > md: raid1 personality registered for level 1
> > [--snip--]
> > md: multipath personality registered for level -4
> > register_blkdev: failed to get major for mdp
> > [--snip--]
> > VFS: Cannot open root device "md1" or unknown-block(0,0)
>
> Someone else reported that against mainline. Can you please debug it a bit?

Sure, tomorrow I will.

> I'd suggested reverting the recent changes in there:
>
> --- a/block/genhd.c~a
> +++ a/block/genhd.c
> @@ -61,14 +61,6 @@ int register_blkdev(unsigned int major,
> /* temporary */
> if (major == 0) {
> for (index = ARRAY_SIZE(major_names)-1; index > 0; index--) {
> - /*
> - * Disallow the LANANA-assigned LOCAL/EXPERIMENTAL
> - * majors
> - */
> - if ((60 <= index && index <= 63) ||
> - (120 <= index && index <= 127) ||
> - (240 <= index && index <= 254))
> - continue;
> if (major_names[index] == NULL)
> break;
> }
> _
>
> but I don't see how they could cause this.
>
>
> > At the moment I have no serial console attached to the box, so I had to rewrite
> > the messages manually.
>
> netconsole is good.

I know. :-)

In the meantime, I've got something worse on another x86_64 box:

Asus Laptop ACPI Extras version 0.30
L5D model detected, supported
audit(1171831698.918:2): audit_pid=4281 old=0 by auid=4294967295
general protection fault: 0000 [2] PREEMPT
last sysfs file: /class/net/eth2/carrier
CPU 0
Modules linked in: af_packet ipv6 snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device asus_acpi backlight button battery ac dm_mod pcmr
Pid: 178, comm: pdflush Not tainted 2.6.20-mm2 #1
RIP: 0010:[<ffffffff8034bce4>] [<ffffffff8034bce4>] __make_request+0x134/0x370
RSP: 0000:ffff81005ed659a0 EFLAGS: 00010297
RAX: 00000000ffffffff RBX: 6b6b6b6b6b6b6b6b RCX: 000000000203396a
RDX: 0000000100000000 RSI: ffff810037b4dbb0 RDI: ffff81004683d8c0
RBP: ffff81005ed659f0 R08: ffff81004683d070 R09: ffff81003d333cc0
R10: 0000000000000000 R11: 0000000000000000 R12: ffff810037b4dbb0
R13: ffff81005daba3f0 R14: ffff810037daca90 R15: ffff81005daba3d0
FS: 00002ad4a29e6d00(0000) GS:ffffffff805db000(0000) knlGS:0000000000000000
CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 00002b6a345aa000 CR3: 0000000056585000 CR4: 00000000000006e0
Process pdflush (pid: 178, threadinfo ffff81005ed64000, task ffff810037b060c0)
Stack: ffff810002852540 0000000000000001 ffff810037b4dbb0 ffffffff8026be21
ffff81005ed65a40 0000000000000008 ffff810037b4dbb0 0000000000000800
0000000000000008 ffff8100021d94e0 ffff81005ed65a40 ffffffff80348e7c
Call Trace:
[<ffffffff8026be21>] mempool_alloc_slab+0x11/0x20
[<ffffffff80348e7c>] generic_make_request+0x1ec/0x230
[<ffffffff8034b7e6>] submit_bio+0xf6/0x110
[<ffffffff802b60f0>] submit_bh+0x100/0x130
[<ffffffff802b788a>] __block_write_full_page+0x1ca/0x2e0
[<ffffffff802bc040>] blkdev_get_block+0x0/0x70
[<ffffffff802bc040>] blkdev_get_block+0x0/0x70
[<ffffffff802b7a93>] block_write_full_page+0xf3/0x110
[<ffffffff802baeb3>] blkdev_writepage+0x13/0x20
[<ffffffff8026eb85>] __writepage+0x15/0x40
[<ffffffff8026f1e3>] write_cache_pages+0x1f3/0x360
[<ffffffff8026eb70>] __writepage+0x0/0x40
[<ffffffff8026f372>] generic_writepages+0x22/0x30
[<ffffffff8026f3c6>] do_writepages+0x46/0x80
[<ffffffff802b1f67>] __writeback_single_inode+0x1d7/0x370
[<ffffffff802b2355>] generic_sync_sb_inodes+0x35/0x2b0
[<ffffffff802b24f9>] generic_sync_sb_inodes+0x1d9/0x2b0
[<ffffffff802b29f2>] writeback_inodes+0x82/0x100
[<ffffffff802b25f5>] sync_sb_inodes+0x25/0x30
[<ffffffff802b2a08>] writeback_inodes+0x98/0x100
[<ffffffff8026fd40>] pdflush+0x0/0x1e0
[<ffffffff8026f934>] wb_kupdate+0x94/0x110
[<ffffffff8026fe68>] pdflush+0x128/0x1e0
[<ffffffff8026f8a0>] wb_kupdate+0x0/0x110
[<ffffffff8026fd40>] pdflush+0x0/0x1e0
[<ffffffff80240863>] kthread+0xd3/0x110
[<ffffffff80240700>] keventd_create_kthread+0x0/0x90
[<ffffffff8020a3f8>] child_rip+0xa/0x12
[<ffffffff80483e5b>] _spin_unlock_irq+0x2b/0x60
[<ffffffff80209fb0>] restore_args+0x0/0x30
[<ffffffff80240790>] kthread+0x0/0x110
[<ffffffff8020a3ee>] child_rip+0x0/0x12

Code: 48 8b 43 08 0f 18 08 49 39 dd 75 a2 49 8b be 38 02 00 00 e8
RIP [<ffffffff8034bce4>] __make_request+0x134/0x370
RSP <ffff81005ed659a0>
PM: Adding info for No Bus:vcs10
PM: Adding info for No Bus:vcsa10

It looks _really_ bad to me. :-(

> > 2) On HPC nx6325 I get the following 100% of the time during the resume from
> > disk:
> >
> > BUG: at drivers/pci/pci.c:823 pcim_enable_device()
> >
> > Call Trace:
> > [<ffffffff80325ff8>] pcim_enable_device+0x93/0xb3
> > [<ffffffff803a974a>] ata_pci_device_do_resume+0x21/0x5e
> > [<ffffffff803b5e6c>] sil_pci_device_resume+0x1c/0x51
> > [<ffffffff8032800d>] pci_device_resume+0x22/0x53
> > [<ffffffff8039ae58>] resume_device+0xca/0x131
> > [<ffffffff8039af40>] dpm_resume+0x81/0xd3
> > [<ffffffff8039afc2>] device_resume+0x30/0x45
> > [<ffffffff802a0792>] snapshot_ioctl+0x245/0x63e
> > [<ffffffff8023cfcc>] do_ioctl+0x5e/0x77
> > [<ffffffff8022d2b3>] vfs_ioctl+0x25c/0x279
> > [<ffffffff80246a80>] sys_ioctl+0x5f/0x82
> > [<ffffffff80215586>] sys_write+0x47/0x70
> > [<ffffffff8025711e>] system_call+0x7e/0x83
> >
> > Nevertheless, the system seems to be fully functional after the resume.
> >
> > [I've been observing it since 2.6.20-git10 and have reported it for a couple
> > of times, but apparently nobody cares. :-(]
>
> This is a Tejun thing - apparently it's due to swsusp calling suspend once
> and resume twice (or is it vice versa). He'll be looking into it soon.

OK