xen: events: Process event channels notifications in round-robin order.

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Avoids fairness issue resulting from domain 0 processing lowest
numbered event channel first.

Fixes bug #1115 "Event channel port scanning unfair".

Bugzilla: http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1115
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
[ijc: forward ported from linux-2.6.18-xen.hg 324:7fe1c6d02a2b
 various variables have different names in this tree:
  l1  -> pending_words
  l2  -> pending_bits
  l1i -> word_idx
  l2i -> bit_idx]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

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This commit is contained in:

Scott Rixner 2011-03-03 09:30:08 +00:00 • committed by Konrad Rzeszutek Wilk

parent 71eef7d1e3

commit ab7f863e41

1 changed files with 65 additions and 7 deletions

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drivers/xen/events.c

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