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authorYinghai Lu <yinghai@kernel.org>2009-03-24 13:23:16 -0700
committerIngo Molnar <mingo@elte.hu>2009-03-24 22:12:10 +0100
commitfa74c9073370e57fa28e02aff13f4d7b1806505c (patch)
treeb86bdbe35d1dc924ea2e789e4f5976cc1a408da5 /kernel/extable.c
parent29219683c46cb89edf5c58418b5305b14646d030 (diff)
x86: fix set_extra_move_desc calling
Impact: fix bug with irq-descriptor moving when logical flat Rusty observed: > The effect of setting desc->affinity (ie. from userspace via sysfs) has varied > over time. In 2.6.27, the 32-bit code anded the value with cpu_online_map, > and both 32 and 64-bit did that anding whenever a cpu was unplugged. > > 2.6.29 consolidated this into one routine (and fixed hotplug) but introduced > another variation: anding the affinity with cfg->domain. Is this right, or > should we just set it to what the user said? Or as now, indicate that we're > restricting it. Eric pointed out that desc->affinity should be what the user requested, if it is at all possible to honor the user space request. This bug got introduced by commit 22f65d31b "x86: Update io_apic.c to use new cpumask API". Fix it by moving the masking to before the descriptor moving ... Reported-by: Rusty Russell <rusty@rustcorp.com.au> Reported-by: Eric W. Biederman <ebiederm@xmission.com> LKML-Reference: <49C94134.4000408@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/extable.c')
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