From: Juergen Gross <jgross@suse.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
Wei Liu <wei.liu2@citrix.com>,
xen-devel <xen-devel@lists.xenproject.org>,
Roger Pau Monne <roger.pau@citrix.com>
Subject: Re: [PATCH 4/6] xen: don't free percpu areas during suspend
Date: Thu, 28 Mar 2019 08:53:06 +0100 [thread overview]
Message-ID: <78816896-aa22-0031-4d36-bc33bee78c83@suse.com> (raw)
In-Reply-To: <5C9C7BF1020000780022258F@suse.com>
On 28/03/2019 08:46, Jan Beulich wrote:
>>>> On 18.03.19 at 14:11, <jgross@suse.com> wrote:
>> Instead of freeing percpu areas during suspend and allocating them
>> again when resuming keep them. Only free an area in case a cpu didn't
>> come up again when resuming.
>
> There's another aspect here which needs at least mentioning:
> Right now, CPUs coming back up have their per-CPU data
> cleared. Not doing so may indeed be an improvement in
> some cases (like statistics collected), but may also get in the
> way in other cases.
I have checked the respective cpu notifier hooks and I think this is no
problem. I hope I didn't overlook something.
I'll add a note to the commit message.
Juergen
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next prev parent reply other threads:[~2019-03-28 7:53 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-18 13:11 [PATCH 0/6] xen: simplify suspend/resume handling Juergen Gross
2019-03-18 13:11 ` [PATCH 1/6] xen/sched: call cpu_disable_scheduler() via cpu notifier Juergen Gross
2019-03-27 15:34 ` Andrew Cooper
2019-03-27 15:35 ` George Dunlap
2019-03-27 16:22 ` Jan Beulich
2019-03-27 16:24 ` Dario Faggioli
2019-03-27 16:31 ` Juergen Gross
2019-03-27 16:51 ` Dario Faggioli
2019-03-27 16:53 ` Juergen Gross
[not found] ` <5C9BA336020000780022235B@suse.com>
2019-03-27 16:45 ` Juergen Gross
2019-03-27 16:58 ` Jan Beulich
2019-03-18 13:11 ` [PATCH 2/6] xen: add helper for calling notifier_call_chain() to common/cpu.c Juergen Gross
2019-03-25 11:56 ` Dario Faggioli
2019-03-27 12:25 ` George Dunlap
2019-03-27 15:39 ` Andrew Cooper
2019-03-27 16:05 ` Juergen Gross
2019-03-18 13:11 ` [PATCH 3/6] xen: add new cpu notifier action CPU_RESUME_FAILED Juergen Gross
2019-03-25 12:21 ` Dario Faggioli
2019-03-25 12:29 ` Juergen Gross
2019-03-27 15:54 ` Dario Faggioli
2019-03-27 15:49 ` George Dunlap
2019-03-27 16:29 ` Jan Beulich
[not found] ` <5C9BA5010200007800222375@suse.com>
2019-03-27 16:32 ` Juergen Gross
2019-03-18 13:11 ` [PATCH 4/6] xen: don't free percpu areas during suspend Juergen Gross
2019-03-25 18:14 ` Dario Faggioli
2019-03-27 15:55 ` Andrew Cooper
2019-03-27 16:18 ` Juergen Gross
2019-03-27 16:38 ` Jan Beulich
[not found] ` <5C9BA70E02000078002223A3@suse.com>
2019-03-27 16:52 ` Juergen Gross
2019-03-28 6:59 ` Juergen Gross
2019-03-28 8:03 ` Jan Beulich
2019-04-11 9:49 ` Jan Beulich
2019-04-11 9:49 ` [Xen-devel] " Jan Beulich
[not found] ` <5C9C7FD202000078002225AB@suse.com>
2019-03-28 8:35 ` Juergen Gross
2019-03-28 9:36 ` Jan Beulich
2019-03-28 7:46 ` Jan Beulich
[not found] ` <5C9C7BF1020000780022258F@suse.com>
2019-03-28 7:53 ` Juergen Gross [this message]
2019-03-28 8:04 ` Jan Beulich
2019-03-18 13:11 ` [PATCH 5/6] xen/cpupool: simplify suspend/resume handling Juergen Gross
2019-03-27 15:56 ` George Dunlap
2019-03-27 16:32 ` Dario Faggioli
2019-03-18 13:11 ` [PATCH 6/6] xen/sched: don't disable scheduler on cpus during suspend Juergen Gross
2019-03-27 23:10 ` Dario Faggioli
2019-03-28 5:41 ` Juergen Gross
-- strict thread matches above, loose matches on Subject: below --
2019-03-28 8:35 [PATCH 4/6] xen: don't free percpu areas " Juergen Gross
[not found] <20190318131155.29450*1*jgross@suse.com>
[not found] ` <20190318131155.29450*5*jgross@suse.com>
[not found] <20190318131155.29450****1****jgross@suse.com>
[not found] ` <20190318131155.29450****5****jgross@suse.com>
[not found] ` <e10c14cd****54ac****8d8c****2d5c****db4adbd39d07@citrix.com>
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