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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-05-18 13:18:31 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-05-18 13:42:15 +0300
commit437fd90c0250dee670290f9b714253671a990160 (patch)
treeb871786c360704244a07411c69fb58da9ead4a06 /qemu/qemu-coroutine.c
parent5bbd6fe9b8bab2a93e548c5a53b032d1939eec05 (diff)
These changes are the raw update to qemu-2.6.
Collission happened in the following patches: migration: do cleanup operation after completion(738df5b9) Bug fix.(1750c932f86) kvmclock: add a new function to update env->tsc.(b52baab2) The code provided by the patches was already in the upstreamed version. Change-Id: I3cc11841a6a76ae20887b2e245710199e1ea7f9a Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'qemu/qemu-coroutine.c')
-rw-r--r--qemu/qemu-coroutine.c146
1 files changed, 0 insertions, 146 deletions
diff --git a/qemu/qemu-coroutine.c b/qemu/qemu-coroutine.c
deleted file mode 100644
index c17a92b10..000000000
--- a/qemu/qemu-coroutine.c
+++ /dev/null
@@ -1,146 +0,0 @@
-/*
- * QEMU coroutines
- *
- * Copyright IBM, Corp. 2011
- *
- * Authors:
- * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
- * Kevin Wolf <kwolf@redhat.com>
- *
- * This work is licensed under the terms of the GNU LGPL, version 2 or later.
- * See the COPYING.LIB file in the top-level directory.
- *
- */
-
-#include "trace.h"
-#include "qemu-common.h"
-#include "qemu/thread.h"
-#include "qemu/atomic.h"
-#include "block/coroutine.h"
-#include "block/coroutine_int.h"
-
-enum {
- POOL_BATCH_SIZE = 64,
-};
-
-/** Free list to speed up creation */
-static QSLIST_HEAD(, Coroutine) release_pool = QSLIST_HEAD_INITIALIZER(pool);
-static unsigned int release_pool_size;
-static __thread QSLIST_HEAD(, Coroutine) alloc_pool = QSLIST_HEAD_INITIALIZER(pool);
-static __thread unsigned int alloc_pool_size;
-static __thread Notifier coroutine_pool_cleanup_notifier;
-
-static void coroutine_pool_cleanup(Notifier *n, void *value)
-{
- Coroutine *co;
- Coroutine *tmp;
-
- QSLIST_FOREACH_SAFE(co, &alloc_pool, pool_next, tmp) {
- QSLIST_REMOVE_HEAD(&alloc_pool, pool_next);
- qemu_coroutine_delete(co);
- }
-}
-
-Coroutine *qemu_coroutine_create(CoroutineEntry *entry)
-{
- Coroutine *co = NULL;
-
- if (CONFIG_COROUTINE_POOL) {
- co = QSLIST_FIRST(&alloc_pool);
- if (!co) {
- if (release_pool_size > POOL_BATCH_SIZE) {
- /* Slow path; a good place to register the destructor, too. */
- if (!coroutine_pool_cleanup_notifier.notify) {
- coroutine_pool_cleanup_notifier.notify = coroutine_pool_cleanup;
- qemu_thread_atexit_add(&coroutine_pool_cleanup_notifier);
- }
-
- /* This is not exact; there could be a little skew between
- * release_pool_size and the actual size of release_pool. But
- * it is just a heuristic, it does not need to be perfect.
- */
- alloc_pool_size = atomic_xchg(&release_pool_size, 0);
- QSLIST_MOVE_ATOMIC(&alloc_pool, &release_pool);
- co = QSLIST_FIRST(&alloc_pool);
- }
- }
- if (co) {
- QSLIST_REMOVE_HEAD(&alloc_pool, pool_next);
- alloc_pool_size--;
- }
- }
-
- if (!co) {
- co = qemu_coroutine_new();
- }
-
- co->entry = entry;
- QTAILQ_INIT(&co->co_queue_wakeup);
- return co;
-}
-
-static void coroutine_delete(Coroutine *co)
-{
- co->caller = NULL;
-
- if (CONFIG_COROUTINE_POOL) {
- if (release_pool_size < POOL_BATCH_SIZE * 2) {
- QSLIST_INSERT_HEAD_ATOMIC(&release_pool, co, pool_next);
- atomic_inc(&release_pool_size);
- return;
- }
- if (alloc_pool_size < POOL_BATCH_SIZE) {
- QSLIST_INSERT_HEAD(&alloc_pool, co, pool_next);
- alloc_pool_size++;
- return;
- }
- }
-
- qemu_coroutine_delete(co);
-}
-
-void qemu_coroutine_enter(Coroutine *co, void *opaque)
-{
- Coroutine *self = qemu_coroutine_self();
- CoroutineAction ret;
-
- trace_qemu_coroutine_enter(self, co, opaque);
-
- if (co->caller) {
- fprintf(stderr, "Co-routine re-entered recursively\n");
- abort();
- }
-
- co->caller = self;
- co->entry_arg = opaque;
- ret = qemu_coroutine_switch(self, co, COROUTINE_ENTER);
-
- qemu_co_queue_run_restart(co);
-
- switch (ret) {
- case COROUTINE_YIELD:
- return;
- case COROUTINE_TERMINATE:
- trace_qemu_coroutine_terminate(co);
- coroutine_delete(co);
- return;
- default:
- abort();
- }
-}
-
-void coroutine_fn qemu_coroutine_yield(void)
-{
- Coroutine *self = qemu_coroutine_self();
- Coroutine *to = self->caller;
-
- trace_qemu_coroutine_yield(self, to);
-
- if (!to) {
- fprintf(stderr, "Co-routine is yielding to no one\n");
- abort();
- }
-
- self->caller = NULL;
- qemu_coroutine_switch(self, to, COROUTINE_YIELD);
-}