Messages in this thread | | | Date | Wed, 30 Sep 2009 18:57:00 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: [Kernel BUG] ext4 for v2.6.32 round II |
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On Thu, 1 Oct 2009, Markus Trippelsdorf wrote: > > Running latest git I get the following kernel BUG message: > > ------------[ cut here ]------------ > Kernel BUG at ffffffff810efa89 [verbose debug info unavailable]
You really shouldn't turn off verbose debug info unless you are _really_ tight on memory in some embedded device. It's not that complex, nor does it use a lot of memory, and it makes the error report much harder to figure out when the verbose debug output information isn't available.
But in this case I can do it by just looking at the function/offset:
> RIP: 0010:[<ffffffff810efa89>] [<ffffffff810efa89>] ext4_num_dirty_pages+0x113/0x213
The only BUG_ON() that seems relevant in that function (at least with the config I tried with) ends up being
fs/ext4/inode.c:1184
in my sources, which is from "page_buffers(page)", which has a
BUG_ON(!PagePrivate(page));
in it. And that would have been much easier to figure out if you had had CONFIG_DEBUG_BUGVERBOSE enabled..
Now over to the ext4 people to actually hopefully _solve_ the bug. Maybe bisection would help.
Linus
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