From edcae5a7c4ce05dacd4e475e2b94cc65bb2beff8 Mon Sep 17 00:00:00 2001 From: Daniel Veillard Date: Thu, 7 Jan 2010 14:48:06 +0100 Subject: [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 --- src/qemu/qemu_conf.c | 1 + 1 file changed, 1 insertion(+) diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c index 824055f3ca..d3da7768d2 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); }