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| author | Cliff Wickman <cpw@sgi.com> | 2010-06-02 16:22:02 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-06-08 21:13:46 +0200 |
| commit | 39847e7f3c8198b14102fe7ba4b3a6a1d84bbcfe (patch) | |
| tree | 18d8b66fc06c036f516978a4826d75c0cc1a7676 /arch | |
| parent | 4faca1550838708d71f6eea14cdacb0876c3a5a4 (diff) | |
| download | linux-39847e7f3c8198b14102fe7ba4b3a6a1d84bbcfe.tar.gz linux-39847e7f3c8198b14102fe7ba4b3a6a1d84bbcfe.tar.bz2 linux-39847e7f3c8198b14102fe7ba4b3a6a1d84bbcfe.zip | |
x86, UV: Correct BAU software acknowledge
Correct the acknowledgment and the reset of a BAU
software-acknowledged message.
A retry message should be testing only for timed-out resources
(mask << 8). (And we delete a log message that might cause
unnecessary concern) The acknowledge MMR is
|--timed-out--|---pending--|, each is 8 bits.
The IPI-driven reset of software acknowledge resources frees
both timed out and pending resources.
Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: gregkh@suse.de
LKML-Reference: <E1OJvNy-0004aP-7O@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/tlb_uv.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/arch/x86/kernel/tlb_uv.c b/arch/x86/kernel/tlb_uv.c index d75929039846..295a41122da1 100644 --- a/arch/x86/kernel/tlb_uv.c +++ b/arch/x86/kernel/tlb_uv.c @@ -161,15 +161,14 @@ static inline void uv_bau_process_retry_msg(struct msg_desc *mdp, slot2 = msg2 - mdp->va_queue_first; mmr = uv_read_local_mmr (UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE); - msg_res = ((msg2->sw_ack_vector << 8) | - msg2->sw_ack_vector); + msg_res = msg2->sw_ack_vector; /* * This is a message retry; clear the resources held * by the previous message only if they timed out. * If it has not timed out we have an unexpected * situation to report. */ - if (mmr & (msg_res << 8)) { + if (mmr & (msg_res << UV_SW_ACK_NPENDING)) { /* * is the resource timed out? * make everyone ignore the cancelled message. @@ -179,9 +178,9 @@ static inline void uv_bau_process_retry_msg(struct msg_desc *mdp, cancel_count++; uv_write_local_mmr( UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, - (msg_res << 8) | msg_res); - } else - printk(KERN_INFO "note bau retry: no effect\n"); + (msg_res << UV_SW_ACK_NPENDING) | + msg_res); + } } } if (!cancel_count) @@ -317,13 +316,13 @@ uv_do_reset(void *ptr) */ mmr = uv_read_local_mmr (UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE); - msg_res = ((msg->sw_ack_vector << 8) | - msg->sw_ack_vector); + msg_res = msg->sw_ack_vector; if (mmr & msg_res) { stat->d_rcanceled++; uv_write_local_mmr( UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, - msg_res); + (msg_res << UV_SW_ACK_NPENDING) | + msg_res); } } } |