4745d1cb0a
The env variable IRQBALANCE_BANNED_CPUS will be discarded, so backport to support IRQBALANCE_BANNED_CPULIST instead. Signed-off-by: Yunfeng Ye <yeyunfeng@huawei.com>
53 lines
1.5 KiB
Diff
53 lines
1.5 KiB
Diff
From 677b686e223c74e64f5b230bdb4079555a5a62a9 Mon Sep 17 00:00:00 2001
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From: ChanderG <mail@chandergovind.org>
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Date: Tue, 25 Aug 2020 15:46:56 +0530
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Subject: [PATCH] add env variable to ban cpus using cpulist syntax
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allows banning of cpus using the taskset cpulist syntax in addition to the
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bitmap syntax supported via the existing environment variable
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IRQBALANCE_BANNED_CPUS
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Signed-off-by: Yunfeng Ye <yeyunfeng@huawei.com>
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---
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cputree.c | 6 ++++++
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irqbalance.1 | 6 ++++++
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2 files changed, 12 insertions(+)
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diff --git a/cputree.c b/cputree.c
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index 0433657..00cf47f 100644
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--- a/cputree.c
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+++ b/cputree.c
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@@ -127,6 +127,12 @@ static void setup_banned_cpus(void)
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goto out;
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}
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+ env = getenv("IRQBALANCE_BANNED_CPULIST");
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+ if (env && strlen(env)) {
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+ cpulist_parse(env, strlen(env), banned_cpus);
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+ goto out;
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+ }
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+
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path = "/sys/devices/system/cpu/isolated";
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process_one_line(path, get_mask_from_cpulist, &isolated_cpus);
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diff --git a/irqbalance.1 b/irqbalance.1
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index 3005f6b..33ffd26 100644
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--- a/irqbalance.1
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+++ b/irqbalance.1
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@@ -158,6 +158,12 @@ Provides a mask of CPUs which irqbalance should ignore and never assign interrup
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If not specified, irqbalance use mask of isolated and adaptive-ticks CPUs on the
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system as the default value.
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+.TP
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+.B IRQBALANCE_BANNED_CPULIST
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+Provides a cpulist which irqbalance should ignore and never assign interrupts to.
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+If not specified, irqbalance use mask of isolated and adaptive-ticks CPUs on the
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+system as the default value.
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+
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.SH "SIGNALS"
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.TP
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.B SIGHUP
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--
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1.8.3.1
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