From: Fenghua Yu <fenghua.yu@intel.com>
To: "Thomas Gleixner" <tglx@linutronix.de>,
"Ingo Molnar" <mingo@redhat.com>, "H Peter Anvin" <hpa@zytor.com>,
"Tony Luck" <tony.luck@intel.com>
Cc: "linux-kernel" <linux-kernel@vger.kernel.org>,
"x86" <x86@kernel.org>, Xiaochen Shen <xiaochen.shen@intel.com>,
Fenghua Yu <fenghua.yu@intel.com>
Subject: [PATCH v2] x86/intel_rdt: Show missing resctrl mount options
Date: Wed, 12 Sep 2018 16:48:38 -0700 [thread overview]
Message-ID: <1536796118-60135-1-git-send-email-fenghua.yu@intel.com> (raw)
From: Xiaochen Shen <xiaochen.shen@intel.com>
In resctrl filesystem, we have some mount options to enable
L3/L2 CDP and MBA Software Controller features if platform supports them:
mount -t resctrl resctrl [-o cdp[,cdpl2][,mba_MBps]] /sys/fs/resctrl
But currently only "cdp" option can be displayed. "cdpl2" and "mba_MBps"
options are not showed even when they are active mount options.
Before this patch:
#mount -t resctrl resctrl -o cdp,mba_MBps /sys/fs/resctrl
#grep resctrl /proc/mounts
/sys/fs/resctrl /sys/fs/resctrl resctrl rw,relatime,cdp 0 0
After this patch:
#mount -t resctrl resctrl -o cdp,mba_MBps /sys/fs/resctrl
#grep resctrl /proc/mountts
/sys/fs/resctrl /sys/fs/resctrl resctrl rw,relatime,cdp,mba_MBps 0 0
Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
---
arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
index b799c00bef09..82459a41fa84 100644
--- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
+++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
@@ -2760,6 +2760,13 @@ static int rdtgroup_show_options(struct seq_file *seq, struct kernfs_root *kf)
{
if (rdt_resources_all[RDT_RESOURCE_L3DATA].alloc_enabled)
seq_puts(seq, ",cdp");
+
+ if (rdt_resources_all[RDT_RESOURCE_L2DATA].alloc_enabled)
+ seq_puts(seq, ",cdpl2");
+
+ if (is_mba_sc(&rdt_resources_all[RDT_RESOURCE_MBA]))
+ seq_puts(seq, ",mba_MBps");
+
return 0;
}
--
2.19.0
next reply other threads:[~2018-09-12 23:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-12 23:48 Fenghua Yu [this message]
2018-10-03 14:22 ` [tip:x86/cache] x86/intel_rdt: Show missing resctrl mount options tip-bot for Xiaochen Shen
2018-10-03 19:58 ` tip-bot for Xiaochen Shen
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