[Ocfs2-users] Linux kernel crash due to ocfs2

[Betzos Giorgos]

Hello,

we have a pair of IBM P570 servers running RHEL5.2
kernel 2.6.18-92.el5.ppc64
We have Oracle RAC on ocfs2 storage
ocfs2 is 1.4.7-1 for the above kernel (downloaded from oracle oss site)

Recently both servers have been crashing with the following error:

Assertion failure in journal_dirty_metadata() at
fs/jbd/transaction.c:1130: "handle->h_buffer_credits > 0"
kernel BUG in journal_dirty_metadata at fs/jbd/transaction.c:1130!

We get some kind of kernel debug prompt.

the stack is as follows:

.ocfs2_journal_dirty+0x78/0x13c [ocfs2]
.ocfs2_search_chain+0x131c/0x165c [ocfs2]
.ocfs2_claim_suballoc_bits+0xadc/0xd94 [ocfs2]
.__ocfs2_claim_clusters+0x1b0/0x348 [ocfs2]
.ocf2_do_extend_allocation+0x1f8/0x5b4 [ocfs2]
.ocfs2_write_cluster_by_desc+0x128/0x850 [ocfs2]
.ocfs2_write_begin_nolock+0xdc0/0xfbc [ocfs2]
.ocfs2_write_begin+0x124/0x224 [ocfs2]
.ocfs2_file_aio_write+0x6a4/0xb40 [ocfs2]
.aio_pwrite+0x50/0xb4
.aio_run_iocb+0x140/0x214
.io_submit_one+0x2fc/0x3a8
.sys_io_submit+0xd0/0x17c
syscall_exit+0x0/0x40

In the last crash case, the file system was full.

Any clues?

There seems to be a ocfs2 kernel patch some time ago for the 2.6.20.2
kernel that fixed some journal credits updates.

Is this another bug?

Any help will be greatly appreciated, because this is a production
system.

Thanks,

George