Re: Linux 2.6.35-rc2

[Linus Torvalds <torvalds@linux-foundation.org>]

On Sun, 6 Jun 2010, Torsten Kaiser wrote:
> 
> The first problem that shows up is, that after the KMS switches to the
> correct video mode (1280x1024 for an DVI attached LCD), the display
> begins to flicker. Every 1..2 seconds (guesstimated) the display turns
> off and on again. Something in the new powersaving?

Or maybe a borderline display timing that the display has trouble syncing 
up with? 

> The second problem is more serious, an OOPS and after that the system
> hangs. Ctrl+Alt+Del did not initiate a shutdown, although the magic
> SysRq still party worked (A first SysRq+S worked, but SysRq+U or a
> second SysRq+S after that did not. SysRq+B still rebooted)

This one looks very much like ATA. Added Jeff and Tejun to the cc.

Jeff, Tejun, anything ring a bell?

		Linus

> [   90.040053] general protection fault: 0000 [#1] SMP
> [   90.045062] last sysfs file: /sys/devices/pci0000:00/0000:00:06.0/0000:05:06.0/resource
> [   90.050007] CPU 0
> [   90.050007] Modules linked in: sg
> [   90.050007]
> [   90.050007] Pid: 335, comm: kblockd/0 Not tainted 2.6.35-rc2 #1 KFN5-D SLI/KFN5-D SLI
> [   90.050007] RIP: 0010:[<ffffffff8135aa64>]  [<ffffffff8135aa64>] ata_find_dev+0x24/0x90
> [   90.050007] RSP: 0018:ffff88007ffdbda0  EFLAGS: 00010082
> [   90.050007] RAX: 0720072007200720 RBX: ffff88007ffc7000 RCX: 0720072007202558
> [   90.050007] RDX: ffff880007009e38 RSI: 0000000000000000 RDI: ffff880007008000
> [   90.050007] RBP: ffff880006cef700 R08: 0000000000000001 R09: 0000000000000008
> [   90.050007] R10: 0000000000000000 R11: ffff88000723edb0 R12: ffff88007f3a3800
> [   90.050007] R13: ffff880007008000 R14: ffffffff81340f80 R15: ffff88007ffc7138
> [   90.050007] FS:  00007f558bc58700(0000) GS:ffff880001c00000(0000) knlGS:0000000000000000
> [   90.050007] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [   90.050007] CR2: 00007fffa9653000 CR3: 0000000006429000 CR4: 00000000000006f0
> [   90.050007] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [   90.050007] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> [   90.050007] Process kblockd/0 (pid: 335, threadinfo ffff88007ffda000, task ffff88007ff8a7d0)
> [   90.050007] Stack:
> [   90.050007]  ffffffff8135ab25 ffffffff8135e7cb ffff880006cef700 ffff88007f3a3800
> [   90.050007] <0> ffff88000723ecd0 0000000000000287 ffff88007ffc7048 ffffffff81341c49
> [   90.050007] <0> ffff88000723ecd0 ffff88007ffc7000 ffff880007290000 ffff88000723ecd0
> [   90.050007] Call Trace:
> [   90.050007]  [<ffffffff8135ab25>] ? ata_scsi_find_dev+0x5/0x30
> [   90.050007]  [<ffffffff8135e7cb>] ? ata_scsi_queuecmd+0x4b/0x2c0
> [   90.050007]  [<ffffffff81341c49>] ? scsi_dispatch_cmd+0xd9/0x210
> [   90.050007]  [<ffffffff81348530>] ? scsi_request_fn+0x300/0x3e0
> [   90.050007]  [<ffffffff811e31e0>] ? blk_unplug_work+0x0/0x20
> [   90.050007]  [<ffffffff811e4624>] ? generic_unplug_device+0x24/0x30
> [   90.050007]  [<ffffffff8104ca6b>] ? worker_thread+0xeb/0x180
> [   90.050007]  [<ffffffff81050690>] ? autoremove_wake_function+0x0/0x30
> [   90.050007]  [<ffffffff8104c980>] ? worker_thread+0x0/0x180
> [   90.050007]  [<ffffffff810501fe>] ? kthread+0x8e/0xa0
> [   90.050007]  [<ffffffff81003194>] ? kernel_thread_helper+0x4/0x10
> [   90.050007]  [<ffffffff81050170>] ? kthread+0x0/0xa0
> [   90.050007]  [<ffffffff81003190>] ? kernel_thread_helper+0x0/0x10
> [   90.050007] Code: 1f 84 00 00 00 00 00 8b 87 00 29 00 00 85 c0 75
> 46 48 8b 87 38 1e 00 00 48 8d 97 38 1e 00 00 48 8d 88 38 1e 00 00 48
> 39 ca 74 4c <48> 3b 90 f8 28 00 00 74 43 ba 01 00 00 00 39 d6 7d 47 48
> 63 f6
> [   90.050007] RIP  [<ffffffff8135aa64>] ata_find_dev+0x24/0x90
> [   90.050007]  RSP <ffff88007ffdbda0>
> [   90.050007] ---[ end trace c14df2a6b8b3b357 ]---
> 
> 
> (gdb) list *0xffffffff8135aa64
> 0xffffffff8135aa64 is in ata_find_dev (include/linux/libata.h:1201).
> 1196            return ap->nr_pmp_links != 0;
> 1197    }
> 1198
> 1199    static inline int ata_is_host_link(const struct ata_link *link)
> 1200    {
> 1201            return link == &link->ap->link || link == link->ap->slave_link;
> 1202    }
> 1203    #else /* CONFIG_SATA_PMP */
> 1204    static inline bool sata_pmp_supported(struct ata_port *ap)
> 1205    {
> 
> CONFIG_SATA_PMP ist set to 'y', because my SiI 3132 should be PMP
> capable. (But there are only two normal hdds attached to this
> controller)
> 
> Please ask, if you need more information or have something to try for me.
> 
> Thanks
> 
> Torsten
>