Date: Tue, 3 Jan 2012 20:53:58 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r229427 - head/sys/x86/acpica Message-ID: <201201032053.q03KrwAk042659@svn.freebsd.org>
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Author: jhb Date: Tue Jan 3 20:53:58 2012 New Revision: 229427 URL: http://svn.freebsd.org/changeset/base/229427 Log: Fix a few bugs in the SRAT parsing code: - Actually increment ndomain when building our list of known domains so that we can properly renumber them to be 0-based and dense. - If the number of domains exceeds the configured maximum (VM_NDOMAIN), bail out of processing the SRAT and disable NUMA rather than hitting an obscure panic later. - Don't bother parsing the SRAT at all if VM_NDOMAIN is set to 1 to disable NUMA (the default). Reported by: phk (2) MFC after: 1 week Modified: head/sys/x86/acpica/srat.c Modified: head/sys/x86/acpica/srat.c ============================================================================== --- head/sys/x86/acpica/srat.c Tue Jan 3 20:53:16 2012 (r229426) +++ head/sys/x86/acpica/srat.c Tue Jan 3 20:53:58 2012 (r229427) @@ -45,6 +45,7 @@ __FBSDID("$FreeBSD$"); #include <dev/acpica/acpivar.h> +#if VM_NDOMAIN > 1 struct cpu_info { int enabled:1; int has_memory:1; @@ -237,9 +238,9 @@ check_phys_avail(void) /* * Renumber the memory domains to be compact and zero-based if not - * already. + * already. Returns an error if there are too many domains. */ -static void +static int renumber_domains(void) { int domains[VM_PHYSSEG_MAX]; @@ -261,6 +262,11 @@ renumber_domains(void) for (j = ndomain; j > slot; j--) domains[j] = domains[j - 1]; domains[slot] = mem_info[i].domain; + ndomain++; + if (ndomain > VM_NDOMAIN) { + printf("SRAT: Too many memory domains\n"); + return (EFBIG); + } } /* Renumber each domain to its index in the sorted 'domains' list. */ @@ -280,6 +286,7 @@ renumber_domains(void) if (cpus[j].enabled && cpus[j].domain == domains[i]) cpus[j].domain = i; } + return (0); } /* @@ -306,13 +313,12 @@ parse_srat(void *dummy) srat_walk_table(srat_parse_entry, &error); acpi_unmap_table(srat); srat = NULL; - if (error || check_domains() != 0 || check_phys_avail() != 0) { + if (error || check_domains() != 0 || check_phys_avail() != 0 || + renumber_domains() != 0) { srat_physaddr = 0; return; } - renumber_domains(); - /* Point vm_phys at our memory affinity table. */ mem_affinity = mem_info; } @@ -354,3 +360,4 @@ srat_set_cpus(void *dummy) } } SYSINIT(srat_set_cpus, SI_SUB_CPU, SI_ORDER_ANY, srat_set_cpus, NULL); +#endif /* VM_NDOMAIN > 1 */
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