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util: Make qemu_prealloc_mem() optionally consume a ThreadContext

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... and implement it under POSIX. When a ThreadContext is provided,
create new threads via the context such that these new threads obtain a
properly configured CPU affinity.

Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Message-Id: <20221014134720.168738-6-david@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
David Hildenbrand
2022-10-14 15:47:18 +02:00
parent 10218ae6d0
commit e04a34e55c
5 changed files with 22 additions and 11 deletions
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5
backends/hostmem.c
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@ -232,7 +232,8 @@ static void host_memory_backend_set_prealloc(Object *obj, bool value,
void *ptr = memory_region_get_ram_ptr(&backend->mr);
uint64_t sz = memory_region_size(&backend->mr);
qemu_prealloc_mem(fd, ptr, sz, backend->prealloc_threads, &local_err);
qemu_prealloc_mem(fd, ptr, sz, backend->prealloc_threads, NULL,
&local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
@ -384,7 +385,7 @@ host_memory_backend_memory_complete(UserCreatable *uc, Error **errp)
*/
if (backend->prealloc) {
qemu_prealloc_mem(memory_region_get_fd(&backend->mr), ptr, sz,
backend->prealloc_threads, &local_err);
backend->prealloc_threads, NULL, &local_err);
if (local_err) {
goto out;
}