Messages in this thread |  | | | Date | Wed, 14 Oct 2009 11:51:43 +0400 | | Subject | Re: [patch 3/3] x86,apic: limit apic dumping, introduce show_lapic setup option | | From | Cyrill Gorcunov <> |
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On 10/14/09, Ingo Molnar <mingo@elte.hu> wrote: > > * Cyrill Gorcunov <gorcunov@openvz.org> wrote: > >> In case if a system has a large number of cpus printing apics >> contents may consume a long time period. >> >> We limit such an output by 1 apic by default. But to have an >> ability to see all apics or some part of them we introduce >> "show_lapic" setup option which allow us to limit/unlimit >> the number of APICs being dumped. >> >> Example: apic=debug show_lapic=5, or apic=debug show_lapic=all >> >> Also move apic_verbosity checking upper that way so helper routines >> do not need to inspect it at all. >> >> Suggested-by: Yinghai Lu <yinghai@kernel.org> >> Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> >> --- >> arch/x86/kernel/apic/io_apic.c | 47 >> +++++++++++++++++++++++++++-------------- >> 1 file changed, 32 insertions(+), 15 deletions(-) > >> +__setup("show_lapic=", setup_show_lapic); > > Note: new __setup() functions need an entry in > Documentation/kernel-parameters.txt as well. > > Ingo > Will update today evening. Thanks!
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