> + * tty_write_message() will invoked by print_warning() > + * at fs/quota/dquot.c if CONFIG_PRINT_QUOTA_WARNING > + * is enabled when a user running out of disk quota limits. > + * It will end up call tty_write(). Here is a potential race tty->ops->write is the low level write method, not tty_write. This appears to be even more wrong than the other one in other ways too - it uses interruptible sleeps but doesn't handle the signal case so will spin on a signal and kill the box. NAK Looking gat the traces I suspect what you've actually got is a much more complicated deadlock where a process doing perfectly normal I/O to the tty has faulted and there is a chain of dependancies through the file system code to the thread which is doing the dquot_alloc_inode. If that is the case then dquot_alloc_inode shouldn't be making blocking calls to tty_write_message and probably the right thing to do is to queue work for it so the tty_write_message is done asynchronously. There are a very limited number of events that need reporting so probably something like a per mount flags and workqueue would allow you to do set_bit(DQUOT_INODEOVER, &foo->events); schedule_work() and the work queue can just xchg the events long for 0 and spew any messages required. Alan -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
