From: Igor Druzhinin <igor.druzhinin@citrix.com>
To: Juergen Gross <jgross@suse.com>, <xen-devel@lists.xenproject.org>
Cc: "Kevin Tian" <kevin.tian@intel.com>,
"Stefano Stabellini" <sstabellini@kernel.org>,
"Julien Grall" <julien@xen.org>,
"Jun Nakajima" <jun.nakajima@intel.com>, "Wei Liu" <wl@xen.org>,
"Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com>,
"George Dunlap" <George.Dunlap@eu.citrix.com>,
"Andrew Cooper" <andrew.cooper3@citrix.com>,
"Ian Jackson" <ian.jackson@eu.citrix.com>,
"Jan Beulich" <jbeulich@suse.com>,
"Roger Pau Monné" <roger.pau@citrix.com>
Subject: Re: [Xen-devel] [PATCH v2 0/4] xen/rcu: let rcu work better with core scheduling
Date: Wed, 19 Feb 2020 16:48:05 +0000 [thread overview]
Message-ID: <8641e973-2ba0-cf09-85da-4ff72bddc723@citrix.com> (raw)
In-Reply-To: <8f900180-718c-e0e4-a638-c1404e00058f@citrix.com>
On 18/02/2020 13:15, Igor Druzhinin wrote:
> On 18/02/2020 12:21, Juergen Gross wrote:
>> Today the RCU handling in Xen is affecting scheduling in several ways.
>> It is raising sched softirqs without any real need and it requires
>> tasklets for rcu_barrier(), which interacts badly with core scheduling.
>>
>> This small series repairs those issues.
>>
>> Additionally some ASSERT()s are added for verification of sane rcu
>> handling. In order to avoid those triggering right away the obvious
>> violations are fixed.
>>
>
> Initial test of the first 2 patches is promising. Will run more tests
> over night to see how stable it is.
I stress-tested it over night and it seems to work for our case.
Tested-by: Igor Druzhinin <igor.druzhinin@citrix.com>
Igor
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next prev parent reply other threads:[~2020-02-19 16:48 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-18 12:21 [Xen-devel] [PATCH v2 0/4] xen/rcu: let rcu work better with core scheduling Juergen Gross
2020-02-18 12:21 ` [Xen-devel] [PATCH v2 1/4] xen/rcu: use rcu softirq for forcing quiescent state Juergen Gross
2020-02-21 14:17 ` Andrew Cooper
2020-02-18 12:21 ` [Xen-devel] [PATCH v2 2/4] xen/rcu: don't use stop_machine_run() for rcu_barrier() Juergen Gross
2020-02-18 12:21 ` [Xen-devel] [PATCH v2 3/4] xen: add process_pending_softirqs_norcu() for keyhandlers Juergen Gross
2020-02-24 11:25 ` Roger Pau Monné
2020-02-24 11:44 ` Jürgen Groß
2020-02-24 12:02 ` Roger Pau Monné
2020-02-18 12:21 ` [Xen-devel] [PATCH v2 4/4] xen/rcu: add assertions to debug build Juergen Gross
2020-02-24 11:31 ` Roger Pau Monné
2020-02-24 11:45 ` Jürgen Groß
2020-02-18 13:15 ` [Xen-devel] [PATCH v2 0/4] xen/rcu: let rcu work better with core scheduling Igor Druzhinin
2020-02-19 16:48 ` Igor Druzhinin [this message]
2020-02-22 2:29 ` Igor Druzhinin
2020-02-22 6:05 ` Jürgen Groß
2020-02-22 12:32 ` Julien Grall
2020-02-22 13:56 ` Jürgen Groß
2020-02-22 16:42 ` Igor Druzhinin
2020-02-23 14:14 ` Jürgen Groß
2020-02-27 15:16 ` Igor Druzhinin
2020-02-27 15:21 ` Jürgen Groß
2020-02-28 7:10 ` Jürgen Groß
2020-03-02 13:25 ` Igor Druzhinin
2020-03-02 14:03 ` Jürgen Groß
2020-03-02 14:23 ` Igor Druzhinin
2020-03-02 14:32 ` Jürgen Groß
2020-03-02 22:29 ` Igor Druzhinin
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