Re: That's pretty much it for 3.5.0

On Jul 17, 2012, at 10:41 AM, Rustad, Mark D wrote:

On Jul 17, 2012, at 9:01 AM, David Miller wrote:

quoted

Linus was _extremely_ generous and took in all the stuff that was
pending in the net tree just now.

Maybe *too* generous. :-) I just updated and when I boot I get an early crash in update_netdev_tables which is in netprio_cgroup.c.

quoted

Besides very serious issues, I'm not willing to consider any more bug
fixes for the 'net' tree at this time.

I think the above issue will have to be fixed, as it completely prevents booting for any kernel that includes the netprio_cgroup option.

quoted

Only one pending known bug qualifies, and that's the CIPSO ip option
processing OOPS'er.  And I'll work on that myself if Paul Moore
doesn't show a sign of life in the next day.

Thanks.

I can start taking a look at this if you like, but I see that Gao feng has two patches in the last set of patches that may be related.

To give you an idea how early the crash is, here are a few log messages leading up to it:

[    0.003455] Dentry cache hash table entries: 262144 (order: 9, 2097152 bytes)
[    0.005550] Inode-cache hash table entries: 131072 (order: 8, 1048576 bytes)
[    0.007165] Mount-cache hash table entries: 256
[    0.010289] Initializing cgroup subsys net_cls
[    0.010947] Initializing cgroup subsys net_prio
[    0.011039] BUG: unable to handle kernel NULL pointer dereference at 0000000000000828
[    0.011998] IP: [<ffffffff814202c8>] update_netdev_tables+0x68/0xe0

I found that I can avoid the crash by configuring the netprio_cgroup as a module. I don't need to have it built in, I just happened to. This finding may lower the temperature of this issue a lot from what I had been feeling.

-- 
Mark Rustad, LAN Access Division, Intel Corporation