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authorSatoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>2007-07-15 23:39:48 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-16 09:05:41 -0700
commit1c6b4aa94576eee6dec3b8011f60d7f666db90b0 (patch)
tree68d94f262f47d555e90c764b49bb0925e5e43fca /drivers/message/i2o
parent85653af7d488702165eba72c6c1dd0250fae4e70 (diff)
cpu hotplug: fix ksoftirqd termination on cpu hotplug with naughty realtime process
Fix ksoftirqd termination on cpu hotplug with naughty real time process. Assuming the following case: - Try to hot remove CPU2 from CPU1. - There is a real time process on CPU2, and that process doesn't sleep at all. - That rt process and ksoftirqd/2 is migrated to the CPU0 Then ksoftirqd/2 can't stop becasue that rt process runs everlastingly on CPU0, and CPU1 waiting the ksoftirqd/2's termination hangs up. To fix this problem, set the priority of ksoftirqd/2 to max one before kthread_stop(). [akpm@linux-foundation.org: fix warning] Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Ingo Molnar <mingo@elte.hu> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Ashok Raj <ashok.raj@intel.com> Cc: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/message/i2o')
0 files changed, 0 insertions, 0 deletions