32 lines
1.3 KiB
Diff
32 lines
1.3 KiB
Diff
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From 8285d9a1cac9cf74130ae71df0ddb4ed14122544 Mon Sep 17 00:00:00 2001
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From: Petr Holasek <pholasek@redhat.com>
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Date: Tue, 21 Aug 2012 14:45:57 +0200
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Subject: [PATCH 8/8] irqlist: added check for avoidance of division by zero
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When counting load_sources, its occasionally possible to have one of our object
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lists be zero (if you exlude all the cpus from balancing for instance). In
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these cases load_sources can be zero, and that will cause a SIGFPE. Avoid that
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by making sure that load_sources is always at least 1.
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Signed-off-by: Petr Holasek <pholasek@redhat.com>
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Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
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---
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irqlist.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/irqlist.c b/irqlist.c
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index e03aa7b..c0e0d2b 100644
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--- a/irqlist.c
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+++ b/irqlist.c
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@@ -160,6 +160,7 @@ static void clear_powersave_mode(struct topo_obj *obj, void *data __attribute__(
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int ___load_sources;\
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memset(&(info), 0, sizeof(struct load_balance_info));\
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for_each_object((name), gather_load_stats, &(info));\
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+ (info).load_sources = ((info).load_sources == 0) ? 1 : ((info).load_sources);\
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(info).avg_load = (info).total_load / (info).load_sources;\
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for_each_object((name), compute_deviations, &(info));\
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___load_sources = ((info).load_sources == 1) ? 1 : ((info).load_sources - 1);\
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--
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1.7.11.4
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