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authorDean Nelson <dcn@sgi.com>2006-11-22 09:25:00 -0500
committerTony Luck <tony.luck@intel.com>2006-12-12 14:48:53 -0500
commita460ef8d0a98ac9ef6b829ae292c9b6c13bc0120 (patch)
treeda52a77a9fee80f98a8a82567814f33d2341234b /include/asm-ia64/sn/xpc.h
parent1cf24bdbbbd2eb5439796dc399ab1649d150ed1d (diff)
[IA64] fix possible XPC deadlock when disconnecting
This patch eliminates a potential deadlock that is possible when XPC disconnects a channel to a partition that has gone down. This deadlock will occur if at least one of the kthreads created by XPC for the purpose of making callouts to the channel's registerer is detained in the registerer and will not be returning back to XPC until some registerer request occurs on the now downed partition. The potential for a deadlock is removed by ensuring that there always is a kthread available to make the channel disconnecting callout to the registerer. Signed-off-by: Dean Nelson <dcn@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'include/asm-ia64/sn/xpc.h')
-rw-r--r--include/asm-ia64/sn/xpc.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-ia64/sn/xpc.h b/include/asm-ia64/sn/xpc.h
index 1d45e1518fb3..e52b8508083b 100644
--- a/include/asm-ia64/sn/xpc.h
+++ b/include/asm-ia64/sn/xpc.h
@@ -673,7 +673,7 @@ extern irqreturn_t xpc_notify_IRQ_handler(int, void *);
673extern void xpc_dropped_IPI_check(struct xpc_partition *); 673extern void xpc_dropped_IPI_check(struct xpc_partition *);
674extern void xpc_activate_partition(struct xpc_partition *); 674extern void xpc_activate_partition(struct xpc_partition *);
675extern void xpc_activate_kthreads(struct xpc_channel *, int); 675extern void xpc_activate_kthreads(struct xpc_channel *, int);
676extern void xpc_create_kthreads(struct xpc_channel *, int); 676extern void xpc_create_kthreads(struct xpc_channel *, int, int);
677extern void xpc_disconnect_wait(int); 677extern void xpc_disconnect_wait(int);
678 678
679 679