Searched hist:"5 edd19af" (Results 1 – 3 of 3) sorted by relevance
/openbmc/linux/arch/x86/include/asm/ |
H A D | kdebug.h | 5edd19af Tue Jul 20 18:09:05 CDT 2010 Cliff Wickman <cpw@sgi.com> x86, UV: Make kdump avoid stack dumps
UV NMI callback's should not write stack dumps when a kdump is to be written.
When invoking the crash kernel to write a dump, kdump_nmi_shootdown_cpus() uses NMI's to get all the cpu's to save their register context and halt.
But the NMI interrupt handler runs a callback list. This patch sets a flag to prevent any of those callbacks from interfering with the halt of the cpu.
For UV, which currently has the only callback to which this is relevant, the uv_handle_nmi() callback should not do dumping of stacks.
The 'in_crash_kexec' flag is defined as an extern in kdebug.h firstly because x2apic_uv_x.c includes it. Secondly because some future callback might need the flag to know that it should not enter the debugger. (Such a scenario was in fact present in the 2.6.32 kernel, SuSE distribution, where a call to kdb needed to be avoided.)
Signed-off-by: Cliff Wickman <cpw@sgi.com> LKML-Reference: <E1ObLvt-0005UZ-Va@eag09.americas.sgi.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> 5edd19af Tue Jul 20 18:09:05 CDT 2010 Cliff Wickman <cpw@sgi.com> x86, UV: Make kdump avoid stack dumps UV NMI callback's should not write stack dumps when a kdump is to be written. When invoking the crash kernel to write a dump, kdump_nmi_shootdown_cpus() uses NMI's to get all the cpu's to save their register context and halt. But the NMI interrupt handler runs a callback list. This patch sets a flag to prevent any of those callbacks from interfering with the halt of the cpu. For UV, which currently has the only callback to which this is relevant, the uv_handle_nmi() callback should not do dumping of stacks. The 'in_crash_kexec' flag is defined as an extern in kdebug.h firstly because x2apic_uv_x.c includes it. Secondly because some future callback might need the flag to know that it should not enter the debugger. (Such a scenario was in fact present in the 2.6.32 kernel, SuSE distribution, where a call to kdb needed to be avoided.) Signed-off-by: Cliff Wickman <cpw@sgi.com> LKML-Reference: <E1ObLvt-0005UZ-Va@eag09.americas.sgi.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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/openbmc/linux/arch/x86/kernel/ |
H A D | crash.c | 5edd19af Tue Jul 20 18:09:05 CDT 2010 Cliff Wickman <cpw@sgi.com> x86, UV: Make kdump avoid stack dumps
UV NMI callback's should not write stack dumps when a kdump is to be written.
When invoking the crash kernel to write a dump, kdump_nmi_shootdown_cpus() uses NMI's to get all the cpu's to save their register context and halt.
But the NMI interrupt handler runs a callback list. This patch sets a flag to prevent any of those callbacks from interfering with the halt of the cpu.
For UV, which currently has the only callback to which this is relevant, the uv_handle_nmi() callback should not do dumping of stacks.
The 'in_crash_kexec' flag is defined as an extern in kdebug.h firstly because x2apic_uv_x.c includes it. Secondly because some future callback might need the flag to know that it should not enter the debugger. (Such a scenario was in fact present in the 2.6.32 kernel, SuSE distribution, where a call to kdb needed to be avoided.)
Signed-off-by: Cliff Wickman <cpw@sgi.com> LKML-Reference: <E1ObLvt-0005UZ-Va@eag09.americas.sgi.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> 5edd19af Tue Jul 20 18:09:05 CDT 2010 Cliff Wickman <cpw@sgi.com> x86, UV: Make kdump avoid stack dumps UV NMI callback's should not write stack dumps when a kdump is to be written. When invoking the crash kernel to write a dump, kdump_nmi_shootdown_cpus() uses NMI's to get all the cpu's to save their register context and halt. But the NMI interrupt handler runs a callback list. This patch sets a flag to prevent any of those callbacks from interfering with the halt of the cpu. For UV, which currently has the only callback to which this is relevant, the uv_handle_nmi() callback should not do dumping of stacks. The 'in_crash_kexec' flag is defined as an extern in kdebug.h firstly because x2apic_uv_x.c includes it. Secondly because some future callback might need the flag to know that it should not enter the debugger. (Such a scenario was in fact present in the 2.6.32 kernel, SuSE distribution, where a call to kdb needed to be avoided.) Signed-off-by: Cliff Wickman <cpw@sgi.com> LKML-Reference: <E1ObLvt-0005UZ-Va@eag09.americas.sgi.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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/openbmc/linux/arch/x86/kernel/apic/ |
H A D | x2apic_uv_x.c | 5edd19af Tue Jul 20 18:09:05 CDT 2010 Cliff Wickman <cpw@sgi.com> x86, UV: Make kdump avoid stack dumps
UV NMI callback's should not write stack dumps when a kdump is to be written.
When invoking the crash kernel to write a dump, kdump_nmi_shootdown_cpus() uses NMI's to get all the cpu's to save their register context and halt.
But the NMI interrupt handler runs a callback list. This patch sets a flag to prevent any of those callbacks from interfering with the halt of the cpu.
For UV, which currently has the only callback to which this is relevant, the uv_handle_nmi() callback should not do dumping of stacks.
The 'in_crash_kexec' flag is defined as an extern in kdebug.h firstly because x2apic_uv_x.c includes it. Secondly because some future callback might need the flag to know that it should not enter the debugger. (Such a scenario was in fact present in the 2.6.32 kernel, SuSE distribution, where a call to kdb needed to be avoided.)
Signed-off-by: Cliff Wickman <cpw@sgi.com> LKML-Reference: <E1ObLvt-0005UZ-Va@eag09.americas.sgi.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> 5edd19af Tue Jul 20 18:09:05 CDT 2010 Cliff Wickman <cpw@sgi.com> x86, UV: Make kdump avoid stack dumps UV NMI callback's should not write stack dumps when a kdump is to be written. When invoking the crash kernel to write a dump, kdump_nmi_shootdown_cpus() uses NMI's to get all the cpu's to save their register context and halt. But the NMI interrupt handler runs a callback list. This patch sets a flag to prevent any of those callbacks from interfering with the halt of the cpu. For UV, which currently has the only callback to which this is relevant, the uv_handle_nmi() callback should not do dumping of stacks. The 'in_crash_kexec' flag is defined as an extern in kdebug.h firstly because x2apic_uv_x.c includes it. Secondly because some future callback might need the flag to know that it should not enter the debugger. (Such a scenario was in fact present in the 2.6.32 kernel, SuSE distribution, where a call to kdb needed to be avoided.) Signed-off-by: Cliff Wickman <cpw@sgi.com> LKML-Reference: <E1ObLvt-0005UZ-Va@eag09.americas.sgi.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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