problem with journal buffer - memory interaction

"Anand Eswaran" <aeswaran@andrew.cmu.edu> · Mon, 22 Mar 2004 11:55:02 -0500 (EST)

Hi :

   I'm modifying the mm subsystem of Linux 2.4.18 significantly as part
of an experiment.

    In this regard, I encountered the following specific problem :

1) In the journalling code in __journal_file_buffer(), line

   J_ASSERT_JH(jh,jh->b_jlist < BJ_Types) fails.

   When I print out the value of jh->b_jlist, I get a large random
garbage value.

   Could anyone please point out some likely scenarios under which problem
#1 could occur?

    I don't know much about the journalling filesystem but could it be
that something Im doing is causing me not to write out the journal buffers in
time.

   I know this mail might be vague but I dont know much more than in this
mail.

Thanks
----
Anand.

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