[libvirt] [PATCH] Qemu: ask for memory preallocation with large pages

The -mem-prealloc flag should be used when using large pages This ensures qemu tries to allocate all required memory immediately, rather than when first used. The latter mode will crash qemu if hugepages aren't available when accessed, while the former should gracefully fallback to non-hugepages. * src/qemu/qemu_conf.c: add -mem-prealloc flag to qemu command line when using large pages Daniel diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c index 824055f..d3da776 100644 --- a/src/qemu/qemu_conf.c +++ b/src/qemu/qemu_conf.c @@ -2108,6 +2108,7 @@ int qemudBuildCommandLine(virConnectPtr conn, def->emulator); goto error; } + ADD_ARG_LIT("-mem-prealloc"); ADD_ARG_LIT("-mem-path"); ADD_ARG_LIT(driver->hugepage_path); } -- Daniel Veillard | libxml Gnome XML XSLT toolkit http://xmlsoft.org/ daniel(a)veillard.com | Rpmfind RPM search engine http://rpmfind.net/ http://veillard.com/ | virtualization library http://libvirt.org/