hi!
ext3/jbd use b_committed_data buffer in order to prevent
allocation of blocks which were freed in non-committed
transaction. I think there is bug in this code. look,
some thread commit thread
----------------------------------------------------------
get_undo_access(#1)
dirty_buffer(#1)
stop_journal()
start commit
start_journal()
get_undo_access(#1):
1) wait for #1 to be
in t_forget_list
write #1 to log
put #1 onto t_forget_list
2) b_commit_data exists,
finish get_undo_access()
for_each_bh_in_forget_list() {
if (jh->b_committed_data) {
kfree(jh->b_committed_data);
jh->b_committed_data = NULL;
}
}
/* using of b_committed_data */
b_committed_data is NULL ?
with best regards, Alex
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This archive was generated by hypermail 2b29 : Fri May 23 2003 - 22:00:30 EST