[memcg BUG] unable to handle kernel NULL pointer derefence at 00000000

Li Zefan
2008-10-21T06:20:27Z

> BTW, "allocate all page_cgroup at boot" patch goes to Linus' git. Wow.
>

But seems this patch causes kernel panic at system boot ... (or maybe one of other
memcg patches?)

I wrote down the panic manually:

BUG: unable to handle kernel NULL pointer dereference at 00000000
IP: page_cgroup_zoneinfo + 0xa

Call Trace:
? mem_cgroup_charge_common + 0x17d
? mem_cgroup_charge
? add_to_page_cache_locked
? add_to_page_cache_lru
? find_or_create_page
? __getblk
? ext3_get_inode_loc
? ext3_iget
? ext3_lookup

Tell me if you need extra information.