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From: Dario Faggioli <dario.faggioli@citrix.com>
To: xen-devel@lists.xenproject.org
Cc: George Dunlap <george.dunlap@eu.citrix.com>,
	Jonathan Creekmore <jonathan.creekmore@gmail.com>,
	Doug Goldstein <cardoe@cardoe.com>,
	Jan Beulich <jbeulich@suse.com>
Subject: [PATCH] xen: sched: use default scheduler upon an invalid "sched="
Date: Fri, 17 Jun 2016 12:31:00 +0200	[thread overview]
Message-ID: <146615946048.6946.4091765859113840716.stgit@Solace.fritz.box> (raw)

instead of just the first scheduler we find in the array.

In fact, right now, if someone makes a typo when passing
the "sched=" command line option to Xen, we (with all
schedulers configured in) pick ARINC653, which is most
likely not what one would expect.

Go for the default scheduler instead.

Signed-off-by: Dario Faggioli <dario.faggioli@citrix.com>
---
Cc: George Dunlap <george.dunlap@eu.citrix.com>
Cc: Jan Beulich <jbeulich@suse.com>
Cc: Doug Goldstein <cardoe@cardoe.com>
Cc: Jonathan Creekmore <jonathan.creekmore@gmail.com>
---
I don't think I'm going to ask for this to be put in 4.7,
as I don't want to give Wei an heart attack... :-)

Considering it for backporting should be enough, IMO.
---
 xen/common/schedule.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/xen/common/schedule.c b/xen/common/schedule.c
index 5e35310..7ac12d3 100644
--- a/xen/common/schedule.c
+++ b/xen/common/schedule.c
@@ -1625,7 +1625,8 @@ void __init scheduler_init(void)
     {
         printk("Could not find scheduler: %s\n", opt_sched);
         for ( i = 0; i < NUM_SCHEDULERS; i++ )
-            if ( schedulers[i] )
+            if ( schedulers[i] &&
+                 !strcmp(schedulers[i]->opt_name, CONFIG_SCHED_DEFAULT) )
             {
                 ops = *schedulers[i];
                 break;


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             reply	other threads:[~2016-06-17 10:31 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-17 10:31 Dario Faggioli [this message]
2016-06-17 10:55 ` Andrew Cooper
2016-06-17 13:42 ` Jonathan Creekmore
2016-06-17 14:06 ` George Dunlap
2016-06-17 14:07 ` Doug Goldstein
2016-06-17 14:27 ` Wei Liu

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