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yaml
---
r: 116918
b: refs/heads/master
c: 10baa26
h: refs/heads/master
v: v3
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Andre Detsch authored and Jeremy Kerr committed Oct 21, 2008
1 parent c4ec853 commit 24cafa8
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Showing 2 changed files with 14 additions and 7 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 837ef884b702edd1c4514eaed1dbecd48721bd22
refs/heads/master: 10baa26c8ccba6f100397c9ba6534be175762e8d
19 changes: 13 additions & 6 deletions trunk/arch/powerpc/platforms/cell/spufs/sched.c
Original file line number Diff line number Diff line change
Expand Up @@ -312,6 +312,15 @@ static struct spu *aff_ref_location(struct spu_context *ctx, int mem_aff,
*/
node = cpu_to_node(raw_smp_processor_id());
for (n = 0; n < MAX_NUMNODES; n++, node++) {
/*
* "available_spus" counts how many spus are not potentially
* going to be used by other affinity gangs whose reference
* context is already in place. Although this code seeks to
* avoid having affinity gangs with a summed amount of
* contexts bigger than the amount of spus in the node,
* this may happen sporadically. In this case, available_spus
* becomes negative, which is harmless.
*/
int available_spus;

node = (node < MAX_NUMNODES) ? node : 0;
Expand All @@ -321,12 +330,10 @@ static struct spu *aff_ref_location(struct spu_context *ctx, int mem_aff,
available_spus = 0;
mutex_lock(&cbe_spu_info[node].list_mutex);
list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) {
if (spu->ctx && spu->ctx->gang
&& spu->ctx->aff_offset == 0)
available_spus -=
(spu->ctx->gang->contexts - 1);
else
available_spus++;
if (spu->ctx && spu->ctx->gang && !spu->ctx->aff_offset
&& spu->ctx->gang->aff_ref_spu)
available_spus -= spu->ctx->gang->contexts;
available_spus++;
}
if (available_spus < ctx->gang->contexts) {
mutex_unlock(&cbe_spu_info[node].list_mutex);
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