This patch-set is aimed to improve console handling especially when kdb operates in NMI context.
Brief description of enhancements: - Add status check for console prior to invoking corresponding handler. - Fixup to avoid possible deadlock in NMI context due to usage of locks in the console handlers. - Prefer usage of polling I/O driver mode (lockless APIs) over invocation of console handlers. Changes in v3: - Split patch to have separate patch for console status check. - New patch to re-factor kdb message emit code. - New patch to prefer polling I/O over console mode. - Add code comments to describe usage of oops_in_progress. Changes in v2: - Use oops_in_progress directly instead of bust_spinlocks(). Sumit Garg (4): kdb: Re-factor kdb_printf() message write code kdb: Check status of console prior to invoking handlers kdb: Make kdb_printf robust to run in NMI context kdb: Switch kdb_msg_write() to use safer polling I/O drivers/tty/serial/kgdboc.c | 17 ++++----- include/linux/kgdb.h | 2 + kernel/debug/kdb/kdb_io.c | 91 ++++++++++++++++++++++++++++++--------------- 3 files changed, 72 insertions(+), 38 deletions(-) -- 2.7.4 _______________________________________________ Kgdb-bugreport mailing list Kgdb-bugreport@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kgdb-bugreport
