Some code paths have special logic depending on the page size reported by sysconf, which in turn affects the test results. We must mock this so tests always have a consistent page size. --- cfg.mk | 8 ++++++++ src/libvirt_private.syms | 2 ++ src/openvz/openvz_util.c | 5 +---- src/qemu/qemu_command.c | 6 +++--- src/qemu/qemu_driver.c | 6 +----- src/util/virfile.c | 2 +- src/util/virnuma.c | 6 +++--- src/util/virutil.c | 13 +++++++++++++ src/util/virutil.h | 3 +++ src/xen/xen_hypervisor.c | 4 ++-- tests/qemuxml2argvmock.c | 8 ++++++++ tests/qemuxml2argvtest.c | 1 + 12 files changed, 46 insertions(+), 18 deletions(-) diff --git a/cfg.mk b/cfg.mk index 70612f8..d72b039 100644 --- a/cfg.mk +++ b/cfg.mk @@ -997,6 +997,11 @@ sc_prohibit_virXXXFree: halt='avoid using 'virXXXFree', use 'virObjectUnref' instead' \ $(_sc_search_regexp) +sc_prohibit_sysconf_pagesize: + @prohibit='sysconf\(_SC_PAGESIZE' \ + halt='use virGetSystemPageSize[KB] instead of sysconf(_SC_PAGESIZE)' \ + $(_sc_search_regexp) + # We don't use this feature of maint.mk. prev_version_file = /dev/null @@ -1187,3 +1192,6 @@ exclude_file_name_regexp--sc_prohibit_devname = \ exclude_file_name_regexp--sc_prohibit_virXXXFree = \ ^(docs/|tests/|examples/|tools/|cfg.mk|src/test/test_driver.c|src/libvirt_public.syms|include/libvirt/libvirt-(domain|network|nodedev|storage|stream|secret|nwfilter|interface|domain-snapshot).h|src/libvirt-(domain|qemu|network|nodedev|storage|stream|secret|nwfilter|interface|domain-snapshot).c$$) + +exclude_file_name_regexp--sc_prohibit_sysconf_pagesize = \ + ^(cfg\.mk|src/util/virutil\.c)$$ diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index f7f8ea2..376c69b 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -2228,6 +2228,8 @@ virGetListenFDs; virGetSCSIHostNameByParentaddr; virGetSCSIHostNumber; virGetSelfLastChanged; +virGetSystemPageSize; +virGetSystemPageSizeKB; virGetUnprivSGIOSysfsPath; virGetUserCacheDirectory; virGetUserConfigDirectory; diff --git a/src/openvz/openvz_util.c b/src/openvz/openvz_util.c index 8032f6a..3cdc1c2 100644 --- a/src/openvz/openvz_util.c +++ b/src/openvz/openvz_util.c @@ -42,10 +42,7 @@ openvzKBPerPages(void) static long kb_per_pages; if (kb_per_pages == 0) { - kb_per_pages = sysconf(_SC_PAGESIZE); - if (kb_per_pages > 0) { - kb_per_pages /= 1024; - } else { + if ((kb_per_pages = virGetSystemPageSizeKB()) < 0) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Can't determine page size")); kb_per_pages = 0; diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index ec4f35b..3b6eddc 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -4540,7 +4540,7 @@ qemuBuildMemoryBackendStr(unsigned long long size, virDomainHugePagePtr master_hugepage = NULL; virDomainHugePagePtr hugepage = NULL; virDomainNumatuneMemMode mode; - const long system_page_size = sysconf(_SC_PAGESIZE) / 1024; + const long system_page_size = virGetSystemPageSizeKB(); virMemAccess memAccess = def->cpu->cells[guestNode].memAccess; size_t i; char *mem_path = NULL; @@ -7051,7 +7051,7 @@ qemuBuildNumaArgStr(virQEMUDriverConfigPtr cfg, bool needBackend = false; int rc; int ret = -1; - const long system_page_size = sysconf(_SC_PAGESIZE) / 1024; + const long system_page_size = virGetSystemPageSizeKB(); if (virDomainNumatuneHasPerNodeBinding(def->numatune) && !(virQEMUCapsGet(qemuCaps, QEMU_CAPS_OBJECT_MEMORY_RAM) || @@ -8239,7 +8239,7 @@ qemuBuildCommandLine(virConnectPtr conn, def->mem.max_balloon = VIR_DIV_UP(def->mem.max_balloon, 1024) * 1024; virCommandAddArgFormat(cmd, "%llu", def->mem.max_balloon / 1024); if (def->mem.nhugepages && (!def->cpu || !def->cpu->ncells)) { - const long system_page_size = sysconf(_SC_PAGESIZE) / 1024; + const long system_page_size = virGetSystemPageSizeKB(); char *mem_path = NULL; if (def->mem.hugepages[0].size == system_page_size) { diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 59a9593..cf351e6 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -1352,12 +1352,8 @@ qemuGetProcessInfo(unsigned long long *cpuTime, int *lastCpu, long *vm_rss, if (lastCpu) *lastCpu = cpu; - /* We got pages - * We want kiloBytes - * _SC_PAGESIZE is page size in Bytes - * So calculate, but first lower the pagesize so we don't get overflow */ if (vm_rss) - *vm_rss = rss * (sysconf(_SC_PAGESIZE) >> 10); + *vm_rss = rss * virGetSystemPageSizeKB(); VIR_DEBUG("Got status for %d/%d user=%llu sys=%llu cpu=%d rss=%ld", diff --git a/src/util/virfile.c b/src/util/virfile.c index 4024f3d..68ef6eb 100644 --- a/src/util/virfile.c +++ b/src/util/virfile.c @@ -1086,7 +1086,7 @@ safezero_mmap(int fd, off_t offset, off_t len) /* align offset and length, rounding offset down and length up */ if (pagemask == 0) - pagemask = ~(sysconf(_SC_PAGESIZE) - 1); + pagemask = ~(virGetSystemPageSize() - 1); map_skip = offset - (offset & pagemask); /* memset wants the mmap'ed file to be present on disk so create a diff --git a/src/util/virnuma.c b/src/util/virnuma.c index 86564d4..e986c71 100644 --- a/src/util/virnuma.c +++ b/src/util/virnuma.c @@ -639,7 +639,7 @@ virNumaGetPageInfo(int node, unsigned int *page_free) { int ret = -1; - long system_page_size = sysconf(_SC_PAGESIZE); + long system_page_size = virGetSystemPageSize(); /* sysconf() returns page size in bytes, * the @page_size is however in kibibytes */ @@ -717,7 +717,7 @@ virNumaGetPages(int node, /* sysconf() returns page size in bytes, * but we are storing the page size in kibibytes. */ - system_page_size = sysconf(_SC_PAGESIZE) / 1024; + system_page_size = virGetSystemPageSizeKB(); /* Query huge pages at first. * On Linux systems, the huge pages pool cuts off the available memory and @@ -841,7 +841,7 @@ virNumaSetPagePoolSize(int node, char *end; unsigned long long nr_count; - if (page_size == sysconf(_SC_PAGESIZE) / 1024) { + if (page_size == virGetSystemPageSizeKB()) { /* Special case as kernel handles system pages * differently to huge pages. */ virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s", diff --git a/src/util/virutil.c b/src/util/virutil.c index 3037293..c905209 100644 --- a/src/util/virutil.c +++ b/src/util/virutil.c @@ -2577,3 +2577,16 @@ virGetListenFDs(void) } #endif /* WIN32 */ + +long virGetSystemPageSize(void) +{ + return sysconf(_SC_PAGESIZE); +} + +long virGetSystemPageSizeKB(void) +{ + long val = virGetSystemPageSize(); + if (val < 0) + return val; + return val / 1024; +} diff --git a/src/util/virutil.h b/src/util/virutil.h index f31bf88..d1173c1 100644 --- a/src/util/virutil.h +++ b/src/util/virutil.h @@ -244,4 +244,7 @@ VIR_ENUM_DECL(virTristateSwitch) unsigned int virGetListenFDs(void); +long virGetSystemPageSize(void); +long virGetSystemPageSizeKB(void); + #endif /* __VIR_UTIL_H__ */ diff --git a/src/xen/xen_hypervisor.c b/src/xen/xen_hypervisor.c index 2473532..31a2a1b 100644 --- a/src/xen/xen_hypervisor.c +++ b/src/xen/xen_hypervisor.c @@ -2736,7 +2736,7 @@ xenHypervisorGetMaxMemory(virConnectPtr conn, int ret; if (kb_per_pages == 0) { - kb_per_pages = sysconf(_SC_PAGESIZE) / 1024; + kb_per_pages = virGetSystemPageSizeKB(); if (kb_per_pages <= 0) kb_per_pages = 4; } @@ -2771,7 +2771,7 @@ xenHypervisorGetDomInfo(virConnectPtr conn, int id, virDomainInfoPtr info) uint32_t domain_flags, domain_state, domain_shutdown_cause; if (kb_per_pages == 0) { - kb_per_pages = sysconf(_SC_PAGESIZE) / 1024; + kb_per_pages = virGetSystemPageSizeKB(); if (kb_per_pages <= 0) kb_per_pages = 4; } diff --git a/tests/qemuxml2argvmock.c b/tests/qemuxml2argvmock.c index eccf4b0..d24725e 100644 --- a/tests/qemuxml2argvmock.c +++ b/tests/qemuxml2argvmock.c @@ -22,7 +22,15 @@ #include "internal.h" #include "virnuma.h" +#include "virmock.h" +#include "virutil.h" #include <time.h> +#include <unistd.h> + +long virGetSystemPageSize(void) +{ + return 4096; +} time_t time(time_t *t) { diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index 89afa81..77ee630 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -22,6 +22,7 @@ # include "cpu/cpu_map.h" # include "virstring.h" # include "storage/storage_driver.h" +# include "virmock.h" # include "testutilsqemu.h" -- 2.1.0