All of lore.kernel.org
 help / color / mirror / Atom feed
From: Nitesh Narayan Lal <nitesh@redhat.com>
To: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	linux-pci@vger.kernel.org, intel-wired-lan@lists.osuosl.org,
	frederic@kernel.org, mtosatti@redhat.com, sassmann@redhat.com,
	jesse.brandeburg@intel.com, lihong.yang@intel.com,
	helgaas@kernel.org, nitesh@redhat.com,
	jeffrey.t.kirsher@intel.com, jacob.e.keller@intel.com,
	jlelli@redhat.com, hch@infradead.org, bhelgaas@google.com,
	mike.marciniszyn@intel.com, dennis.dalessandro@intel.com,
	thomas.lendacky@amd.com, jerinj@marvell.com,
	mathias.nyman@intel.com, jiri@nvidia.com, mingo@redhat.com,
	peterz@infradead.org, juri.lelli@redhat.com,
	vincent.guittot@linaro.org
Subject: [PATCH v2 2/4] sched/isolation: Extend nohz_full to isolate managed IRQs
Date: Wed, 23 Sep 2020 14:11:24 -0400	[thread overview]
Message-ID: <20200923181126.223766-3-nitesh@redhat.com> (raw)
In-Reply-To: <20200923181126.223766-1-nitesh@redhat.com>

Extend nohz_full feature set to include isolation from managed IRQS. This
is required specifically for setups that only uses nohz_full and still
requires isolation for maintaining lower latency for the listed CPUs.

Having this change will ensure that the kernel functions that were using
HK_FLAG_MANAGED_IRQ to derive cpumask for pinning various jobs/IRQs do not
enqueue anything on the CPUs listed under nohz_full.

Suggested-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Nitesh Narayan Lal <nitesh@redhat.com>
---
 kernel/sched/isolation.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c
index 5a6ea03f9882..9df9598a9e39 100644
--- a/kernel/sched/isolation.c
+++ b/kernel/sched/isolation.c
@@ -141,7 +141,7 @@ static int __init housekeeping_nohz_full_setup(char *str)
 	unsigned int flags;
 
 	flags = HK_FLAG_TICK | HK_FLAG_WQ | HK_FLAG_TIMER | HK_FLAG_RCU |
-		HK_FLAG_MISC | HK_FLAG_KTHREAD;
+		HK_FLAG_MISC | HK_FLAG_KTHREAD | HK_FLAG_MANAGED_IRQ;
 
 	return housekeeping_setup(str, flags);
 }
-- 
2.18.2


WARNING: multiple messages have this Message-ID (diff)
From: Nitesh Narayan Lal <nitesh@redhat.com>
To: intel-wired-lan@osuosl.org
Subject: [Intel-wired-lan] [PATCH v2 2/4] sched/isolation: Extend nohz_full to isolate managed IRQs
Date: Wed, 23 Sep 2020 14:11:24 -0400	[thread overview]
Message-ID: <20200923181126.223766-3-nitesh@redhat.com> (raw)
In-Reply-To: <20200923181126.223766-1-nitesh@redhat.com>

Extend nohz_full feature set to include isolation from managed IRQS. This
is required specifically for setups that only uses nohz_full and still
requires isolation for maintaining lower latency for the listed CPUs.

Having this change will ensure that the kernel functions that were using
HK_FLAG_MANAGED_IRQ to derive cpumask for pinning various jobs/IRQs do not
enqueue anything on the CPUs listed under nohz_full.

Suggested-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Nitesh Narayan Lal <nitesh@redhat.com>
---
 kernel/sched/isolation.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c
index 5a6ea03f9882..9df9598a9e39 100644
--- a/kernel/sched/isolation.c
+++ b/kernel/sched/isolation.c
@@ -141,7 +141,7 @@ static int __init housekeeping_nohz_full_setup(char *str)
 	unsigned int flags;
 
 	flags = HK_FLAG_TICK | HK_FLAG_WQ | HK_FLAG_TIMER | HK_FLAG_RCU |
-		HK_FLAG_MISC | HK_FLAG_KTHREAD;
+		HK_FLAG_MISC | HK_FLAG_KTHREAD | HK_FLAG_MANAGED_IRQ;
 
 	return housekeeping_setup(str, flags);
 }
-- 
2.18.2


  parent reply	other threads:[~2020-09-23 18:18 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-23 18:11 [PATCH v2 0/4] isolation: limit msix vectors based on housekeeping CPUs Nitesh Narayan Lal
2020-09-23 18:11 ` [Intel-wired-lan] " Nitesh Narayan Lal
2020-09-23 18:11 ` [PATCH v2 1/4] sched/isolation: API to get housekeeping online CPUs Nitesh Narayan Lal
2020-09-23 18:11   ` [Intel-wired-lan] " Nitesh Narayan Lal
2020-09-24  8:40   ` peterz
2020-09-24  8:40     ` [Intel-wired-lan] " peterz
2020-09-24 12:09     ` Frederic Weisbecker
2020-09-24 12:09       ` [Intel-wired-lan] " Frederic Weisbecker
2020-09-24 12:23       ` Nitesh Narayan Lal
2020-09-24 12:23         ` [Intel-wired-lan] " Nitesh Narayan Lal
2020-09-24 12:24       ` Peter Zijlstra
2020-09-24 12:24         ` [Intel-wired-lan] " Peter Zijlstra
2020-09-24 12:11   ` Frederic Weisbecker
2020-09-24 12:11     ` [Intel-wired-lan] " Frederic Weisbecker
2020-09-24 12:26     ` Nitesh Narayan Lal
2020-09-24 12:26       ` [Intel-wired-lan] " Nitesh Narayan Lal
2020-09-24 12:46   ` Peter Zijlstra
2020-09-24 12:46     ` [Intel-wired-lan] " Peter Zijlstra
2020-09-24 13:45     ` Nitesh Narayan Lal
2020-09-24 13:45       ` [Intel-wired-lan] " Nitesh Narayan Lal
2020-09-24 20:47   ` Bjorn Helgaas
2020-09-24 20:47     ` [Intel-wired-lan] " Bjorn Helgaas
2020-09-24 21:52     ` Nitesh Narayan Lal
2020-09-24 21:52       ` [Intel-wired-lan] " Nitesh Narayan Lal
2020-09-23 18:11 ` Nitesh Narayan Lal [this message]
2020-09-23 18:11   ` [Intel-wired-lan] [PATCH v2 2/4] sched/isolation: Extend nohz_full to isolate managed IRQs Nitesh Narayan Lal
2020-09-23 18:11 ` [PATCH v2 3/4] i40e: limit msix vectors based on housekeeping CPUs Nitesh Narayan Lal
2020-09-23 18:11   ` [Intel-wired-lan] " Nitesh Narayan Lal
2020-09-23 18:11 ` [PATCH v2 4/4] PCI: Limit pci_alloc_irq_vectors as per " Nitesh Narayan Lal
2020-09-23 18:11   ` [Intel-wired-lan] " Nitesh Narayan Lal
2020-09-24 20:45   ` Bjorn Helgaas
2020-09-24 20:45     ` [Intel-wired-lan] " Bjorn Helgaas
2020-09-24 21:39     ` Nitesh Narayan Lal
2020-09-24 21:39       ` [Intel-wired-lan] " Nitesh Narayan Lal
2020-09-24 22:59       ` Bjorn Helgaas
2020-09-24 22:59         ` [Intel-wired-lan] " Bjorn Helgaas
2020-09-24 23:40         ` Nitesh Narayan Lal
2020-09-24 23:40           ` [Intel-wired-lan] " Nitesh Narayan Lal

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200923181126.223766-3-nitesh@redhat.com \
    --to=nitesh@redhat.com \
    --cc=bhelgaas@google.com \
    --cc=dennis.dalessandro@intel.com \
    --cc=frederic@kernel.org \
    --cc=hch@infradead.org \
    --cc=helgaas@kernel.org \
    --cc=intel-wired-lan@lists.osuosl.org \
    --cc=jacob.e.keller@intel.com \
    --cc=jeffrey.t.kirsher@intel.com \
    --cc=jerinj@marvell.com \
    --cc=jesse.brandeburg@intel.com \
    --cc=jiri@nvidia.com \
    --cc=jlelli@redhat.com \
    --cc=juri.lelli@redhat.com \
    --cc=lihong.yang@intel.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=mathias.nyman@intel.com \
    --cc=mike.marciniszyn@intel.com \
    --cc=mingo@redhat.com \
    --cc=mtosatti@redhat.com \
    --cc=netdev@vger.kernel.org \
    --cc=peterz@infradead.org \
    --cc=sassmann@redhat.com \
    --cc=thomas.lendacky@amd.com \
    --cc=vincent.guittot@linaro.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.