The patch titled X86: uv: xpc_make_first_contact hang due to not accepting ACTIVE state has been added to the -mm tree. Its filename is x86-uv-xpc_make_first_contact-hang-due-to-not-accepting-active-state.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: X86: uv: xpc_make_first_contact hang due to not accepting ACTIVE state From: Robin Holt <holt@xxxxxxx> Many times while the initial connection is being made, the contacted partition will send back both the ACTIVATING and the ACTIVE remote_act_state changes in very close succescion. The 1/4 second delay in the make first contact loop is large enough to nearly always miss the ACTIVATING state change. Since either state indicates the remote partition has acknowledged our state change, accept either. To: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Robin Holt <holt@xxxxxxx> Cc: Jack Steiner <steiner@xxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/misc/sgi-xp/xpc_uv.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff -puN drivers/misc/sgi-xp/xpc_uv.c~x86-uv-xpc_make_first_contact-hang-due-to-not-accepting-active-state drivers/misc/sgi-xp/xpc_uv.c --- a/drivers/misc/sgi-xp/xpc_uv.c~x86-uv-xpc_make_first_contact-hang-due-to-not-accepting-active-state +++ a/drivers/misc/sgi-xp/xpc_uv.c @@ -1024,7 +1024,8 @@ xpc_make_first_contact_uv(struct xpc_par xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV); - while (part->sn.uv.remote_act_state != XPC_P_AS_ACTIVATING) { + while (!((part->sn.uv.remote_act_state == XPC_P_AS_ACTIVATING) || + (part->sn.uv.remote_act_state == XPC_P_AS_ACTIVE))) { dev_dbg(xpc_part, "waiting to make first contact with " "partition %d\n", XPC_PARTID(part)); _ Patches currently in -mm which might be from holt@xxxxxxx are x86-uv-introduce-a-means-to-translate-from-gpa-socket_paddr.patch x86-uv-xpc-needs-to-provide-an-abstraction-for-uv_gpa.patch x86-uv-introduce-uv_gpa_is_mmr.patch x86-uv-implement-a-gru_read_gpa-kernel-function.patch x86-uv-update-xpc-to-handle-updated-bios-interface.patch x86-uv-xpc-null-deref-when-mesq-becomes-empty.patch x86-uv-xpc_make_first_contact-hang-due-to-not-accepting-active-state.patch x86-uv-xpc-receive-message-reuse-triggers-invalid-bug_on.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html