From ad1172d8e56e7787ad443d32a97193ac58bf2f17 Mon Sep 17 00:00:00 2001 From: Igor Mammedov Date: Wed, 19 Feb 2020 11:09:47 -0500 Subject: [PATCH] exec: cleanup qemu_minrampagesize()/qemu_maxrampagesize() Since all RAM is backed by hostmem backends, drop global -mem-path invariant and simplify code. Signed-off-by: Igor Mammedov Reviewed-by: David Gibson Reviewed-by: Richard Henderson Message-Id: <20200219160953.13771-74-imammedo@redhat.com> --- exec.c | 49 ++++--------------------------------------------- 1 file changed, 4 insertions(+), 45 deletions(-) diff --git a/exec.c b/exec.c index 8e9cc3b47c..d85a8689d4 100644 --- a/exec.c +++ b/exec.c @@ -1667,59 +1667,18 @@ static int find_max_backend_pagesize(Object *obj, void *opaque) long qemu_minrampagesize(void) { long hpsize = LONG_MAX; - long mainrampagesize; - Object *memdev_root; - MachineState *ms = MACHINE(qdev_get_machine()); - - mainrampagesize = qemu_mempath_getpagesize(mem_path); - - /* it's possible we have memory-backend objects with - * hugepage-backed RAM. these may get mapped into system - * address space via -numa parameters or memory hotplug - * hooks. we want to take these into account, but we - * also want to make sure these supported hugepage - * sizes are applicable across the entire range of memory - * we may boot from, so we take the min across all - * backends, and assume normal pages in cases where a - * backend isn't backed by hugepages. - */ - memdev_root = object_resolve_path("/objects", NULL); - if (memdev_root) { - object_child_foreach(memdev_root, find_min_backend_pagesize, &hpsize); - } - if (hpsize == LONG_MAX) { - /* No additional memory regions found ==> Report main RAM page size */ - return mainrampagesize; - } - - /* If NUMA is disabled or the NUMA nodes are not backed with a - * memory-backend, then there is at least one node using "normal" RAM, - * so if its page size is smaller we have got to report that size instead. - */ - if (hpsize > mainrampagesize && - (ms->numa_state == NULL || - ms->numa_state->num_nodes == 0 || - ms->numa_state->nodes[0].node_memdev == NULL)) { - static bool warned; - if (!warned) { - error_report("Huge page support disabled (n/a for main memory)."); - warned = true; - } - return mainrampagesize; - } + Object *memdev_root = object_resolve_path("/objects", NULL); + object_child_foreach(memdev_root, find_min_backend_pagesize, &hpsize); return hpsize; } long qemu_maxrampagesize(void) { - long pagesize = qemu_mempath_getpagesize(mem_path); + long pagesize = 0; Object *memdev_root = object_resolve_path("/objects", NULL); - if (memdev_root) { - object_child_foreach(memdev_root, find_max_backend_pagesize, - &pagesize); - } + object_child_foreach(memdev_root, find_max_backend_pagesize, &pagesize); return pagesize; } #else -- 2.11.4.GIT