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openSUSE:Step:15-SP4
xen.22516
5ffc58c4-ACPI-reduce-verbosity-by-default.patch
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File 5ffc58c4-ACPI-reduce-verbosity-by-default.patch of Package xen.22516
References: bsc#1177204 # Commit b4b0a8609c42d9e01dd51fd59ab2859f7df2a961 # Date 2021-01-11 14:55:16 +0100 # Author Jan Beulich <jbeulich@suse.com> # Committer Jan Beulich <jbeulich@suse.com> ACPI: reduce verbosity by default While they're KERN_INFO messages and hence not visible by default, we still have had reports that the amount of output is too large, not the least because - the command line controlled resizing of the console ring buffer happens only after SRAT parsing (which may alone produce more than 16k of output), - the default resizing of the console ring buffer happens only after ACPI table parsing, since the default size gets calculated depending on the number or processors found. Gate all per-processor logging behind a new "acpi=verbose", making sure we wouldn't unintentionally pass this on to Dom0. Signed-off-by: Jan Beulich <jbeulich@suse.com> Acked-by: Andrew Cooper <andrew.cooper3@citrix.com> --- a/docs/misc/xen-command-line.pandoc +++ b/docs/misc/xen-command-line.pandoc @@ -75,13 +75,10 @@ of Boolean and String. These are noted ## Parameter details ### acpi -> `= force | ht | noirq | <boolean>` +> `= force | ht | noirq | <boolean> | verbose` **String**, or **Boolean** to disable. -The **acpi** option is used to control a set of four related boolean -flags; `acpi_force`, `acpi_ht`, `acpi_noirq` and `acpi_disabled`. - By default, Xen will scan the DMI data and blacklist certain systems which are known to have broken ACPI setups. Providing `acpi=force` will cause Xen to ignore the blacklist and attempt to use all ACPI @@ -97,12 +94,15 @@ which requires this option to function s Additionally, this will not prevent Xen from finding IO-APIC entries from the MP tables. -Finally, any of the boolean false options can be used to disable ACPI +Further, any of the boolean false options can be used to disable ACPI usage entirely. Because responsibility for ACPI processing is shared between Xen and the domain 0 kernel this option is automatically propagated to the -domain 0 command line +domain 0 command line. + +Finally, `acpi=verbose` will enable per-processor information logging +which may otherwise be too noisy in particular on large systems. ### acpi_apic_instance > `= <integer>` --- a/xen/arch/x86/setup.c +++ b/xen/arch/x86/setup.c @@ -75,6 +75,7 @@ unsigned long __read_mostly cr4_pv32_mas /* "acpi=force": Override the disable blacklist. */ /* "acpi=ht": Limit ACPI just to boot-time to enable HT. */ /* "acpi=noirq": Disables ACPI interrupt routing. */ +/* "acpi=verbose": Enables more verbose ACPI boot time logging. */ static int parse_acpi_param(const char *s); custom_param("acpi", parse_acpi_param); @@ -179,9 +180,6 @@ static char __initdata acpi_param[10] = static int __init parse_acpi_param(const char *s) { - /* Save the parameter so it can be propagated to domain0. */ - safe_strcpy(acpi_param, s); - /* Interpret the parameter for use within Xen. */ if ( !parse_bool(s, NULL) ) { @@ -203,9 +201,17 @@ static int __init parse_acpi_param(const { acpi_noirq_set(); } + else if ( !strcmp(s, "verbose") ) + { + opt_acpi_verbose = true; + return 0; + } else return -EINVAL; + /* Save the parameter so it can be propagated to domain0. */ + safe_strcpy(acpi_param, s); + return 0; } --- a/xen/arch/x86/srat.c +++ b/xen/arch/x86/srat.c @@ -230,8 +230,10 @@ acpi_numa_x2apic_affinity_init(const str apicid_to_node[pa->apic_id] = node; node_set(node, processor_nodes_parsed); acpi_numa = 1; - printk(KERN_INFO "SRAT: PXM %u -> APIC %08x -> Node %u\n", - pxm, pa->apic_id, node); + + if (opt_acpi_verbose) + printk(KERN_INFO "SRAT: PXM %u -> APIC %08x -> Node %u\n", + pxm, pa->apic_id, node); } /* Callback for Proximity Domain -> LAPIC mapping */ @@ -263,8 +265,10 @@ acpi_numa_processor_affinity_init(const apicid_to_node[pa->apic_id] = node; node_set(node, processor_nodes_parsed); acpi_numa = 1; - printk(KERN_INFO "SRAT: PXM %u -> APIC %02x -> Node %u\n", - pxm, pa->apic_id, node); + + if (opt_acpi_verbose) + printk(KERN_INFO "SRAT: PXM %u -> APIC %02x -> Node %u\n", + pxm, pa->apic_id, node); } /* Callback for parsing of the Proximity Domain <-> Memory Area mappings */ --- a/xen/drivers/acpi/tables.c +++ b/xen/drivers/acpi/tables.c @@ -35,6 +35,8 @@ #define ACPI_MAX_TABLES 128 +bool __initdata opt_acpi_verbose; + static const char *__initdata mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" }; static const char *__initdata @@ -50,6 +52,7 @@ void __init acpi_table_print_madt_entry( switch (header->type) { case ACPI_MADT_TYPE_LOCAL_APIC: + if (opt_acpi_verbose) { struct acpi_madt_local_apic *p = (struct acpi_madt_local_apic *)header; @@ -61,6 +64,7 @@ void __init acpi_table_print_madt_entry( break; case ACPI_MADT_TYPE_LOCAL_X2APIC: + if (opt_acpi_verbose) { struct acpi_madt_local_x2apic *p = (struct acpi_madt_local_x2apic *)header; @@ -114,6 +118,7 @@ void __init acpi_table_print_madt_entry( break; case ACPI_MADT_TYPE_LOCAL_APIC_NMI: + if (opt_acpi_verbose) { struct acpi_madt_local_apic_nmi *p = (struct acpi_madt_local_apic_nmi *)header; @@ -127,6 +132,7 @@ void __init acpi_table_print_madt_entry( break; case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI: + if (opt_acpi_verbose) { u16 polarity, trigger; struct acpi_madt_local_x2apic_nmi *p = @@ -166,6 +172,7 @@ void __init acpi_table_print_madt_entry( break; case ACPI_MADT_TYPE_LOCAL_SAPIC: + if (opt_acpi_verbose) { struct acpi_madt_local_sapic *p = (struct acpi_madt_local_sapic *)header; --- a/xen/include/xen/acpi.h +++ b/xen/include/xen/acpi.h @@ -53,6 +53,8 @@ extern acpi_physical_address rsdp_hint; +extern bool opt_acpi_verbose; + enum acpi_interrupt_id { ACPI_INTERRUPT_PMI = 1, ACPI_INTERRUPT_INIT,
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