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    cpuset: fix regression when failed to generate sched domains · 700018e0
    Li Zefan 提交于
    Impact: properly rebuild sched-domains on kmalloc() failure
    
    When cpuset failed to generate sched domains due to kmalloc()
    failure, the scheduler should fallback to the single partition
    'fallback_doms' and rebuild sched domains, but now it only
    destroys but not rebuilds sched domains.
    
    The regression was introduced by:
    
    | commit dfb512ec
    | Author: Max Krasnyansky <maxk@qualcomm.com>
    | Date:   Fri Aug 29 13:11:41 2008 -0700
    |
    |    sched: arch_reinit_sched_domains() must destroy domains to force rebuild
    
    After the above commit, partition_sched_domains(0, NULL, NULL) will
    only destroy sched domains and partition_sched_domains(1, NULL, NULL)
    will create the default sched domain.
    Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
    Cc: Max Krasnyansky <maxk@qualcomm.com>
    Cc: <stable@kernel.org>
    Signed-off-by: NIngo Molnar <mingo@elte.hu>
    700018e0
cpuset.c 70.4 KB