Messages in this thread | | | Date | Mon, 6 Jan 2003 16:41:39 +0100 | Subject | 2.4.20aa1 ide-scsi crashes | From | Fruhwirth Clemens <> |
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under heavy I/O load for my scsi-emulated cdrom 2.4.20aa1 crashes at
drivers/scsi/scsi_dma:155 with panic("scsi_free:Trying to free unused memory")
panic(..) somehow refuses to print the call trace because "IEEE in interrupt handler - no sync".
The only scsi module I'm using is ide-scsi. As I browsed the aa patch I recognized that a few &io_request_lock have been exchanged for "q->queue_lock". But ide-scsi is still locking on io_request_lock. This is probably the source of the race condition. However I'm not sure because I think q->queue_lock is being initialized to &io_request_lock, so it should still be the same lock.
See drivers/scsi/ide-scsi:295 or drivers/scsi/ide-scsi:850 (Why isn't there a lock in that case?)
(done) referrs to sr.c:rw_intr which calls scsi_io_completion which calls the panic(..)-ing scsi_free)
Any guesses?
Regards, Clemens Please CC answers, /me not on list. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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