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37 lines
1.0 KiB
37 lines
1.0 KiB
From 93ed80181e0ce7b81bc88a67fabad1ad829fc460 Mon Sep 17 00:00:00 2001 |
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From: Frediano Ziglio <frediano.ziglio@citrix.com> |
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Date: Wed, 2 Jul 2014 12:59:34 +0100 |
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Subject: [PATCH 1/1] Balance correctly IRQs reappearing |
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If IRQ disappears and reappears later (this happens frequently for Xen) |
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the IRQ is not balanced correctly due to overflow in irq_count (as the |
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counter got smaller and difference cause overflow). |
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Rescan if this happens fix the problem. |
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Signed-off-by: Frediano Ziglio <frediano.ziglio@citrix.com> |
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--- |
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procinterrupts.c | 8 ++++++++ |
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1 file changed, 8 insertions(+) |
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diff --git a/procinterrupts.c b/procinterrupts.c |
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index 6a6bdaa..3476473 100644 |
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--- a/procinterrupts.c |
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+++ b/procinterrupts.c |
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@@ -181,6 +181,14 @@ void parse_proc_interrupts(void) |
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break; |
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} |
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+ /* IRQ removed and reinserted, need restart or this will |
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+ * cause an overflow and IRQ won't be rebalanced again |
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+ */ |
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+ if (count < info->irq_count) { |
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+ need_rescan = 1; |
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+ break; |
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+ } |
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+ |
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info->last_irq_count = info->irq_count; |
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info->irq_count = count; |
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-- |
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2.16.1 |
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