From f5cd8173e77c334c278b4684e3806ad01bba1047 Mon Sep 17 00:00:00 2001 From: Frediano Ziglio Date: Tue, 23 Aug 2011 15:21:08 +0200 Subject: qcow/qcow2: Allocate QCowAIOCB structure using stack instead of calling qemi_aio_get use stack Signed-off-by: Frediano Ziglio Signed-off-by: Kevin Wolf --- block/qcow2.c | 38 +++++++++++--------------------------- 1 file changed, 11 insertions(+), 27 deletions(-) (limited to 'block/qcow2.c') diff --git a/block/qcow2.c b/block/qcow2.c index 01ea2658b0..f4e3c06ad8 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -392,17 +392,6 @@ typedef struct QCowAIOCB { QLIST_ENTRY(QCowAIOCB) next_depend; } QCowAIOCB; -static void qcow2_aio_cancel(BlockDriverAIOCB *blockacb) -{ - QCowAIOCB *acb = container_of(blockacb, QCowAIOCB, common); - qemu_aio_release(acb); -} - -static AIOPool qcow2_aio_pool = { - .aiocb_size = sizeof(QCowAIOCB), - .cancel = qcow2_aio_cancel, -}; - /* * Returns 0 when the request is completed successfully, 1 when there is still * a part left to do and -errno in error cases. @@ -532,13 +521,10 @@ static int qcow2_aio_read_cb(QCowAIOCB *acb) static QCowAIOCB *qcow2_aio_setup(BlockDriverState *bs, int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, BlockDriverCompletionFunc *cb, - void *opaque, int is_write) + void *opaque, int is_write, QCowAIOCB *acb) { - QCowAIOCB *acb; - - acb = qemu_aio_get(&qcow2_aio_pool, bs, cb, opaque); - if (!acb) - return NULL; + memset(acb, 0, sizeof(*acb)); + acb->common.bs = bs; acb->sector_num = sector_num; acb->qiov = qiov; acb->is_write = is_write; @@ -558,19 +544,18 @@ static int qcow2_co_readv(BlockDriverState *bs, int64_t sector_num, int nb_sectors, QEMUIOVector *qiov) { BDRVQcowState *s = bs->opaque; - QCowAIOCB *acb; + QCowAIOCB acb; int ret; - acb = qcow2_aio_setup(bs, sector_num, qiov, nb_sectors, NULL, NULL, 0); + qcow2_aio_setup(bs, sector_num, qiov, nb_sectors, NULL, NULL, 0, &acb); qemu_co_mutex_lock(&s->lock); do { - ret = qcow2_aio_read_cb(acb); + ret = qcow2_aio_read_cb(&acb); } while (ret > 0); qemu_co_mutex_unlock(&s->lock); - qemu_iovec_destroy(&acb->hd_qiov); - qemu_aio_release(acb); + qemu_iovec_destroy(&acb.hd_qiov); return ret; } @@ -674,20 +659,19 @@ static int qcow2_co_writev(BlockDriverState *bs, QEMUIOVector *qiov) { BDRVQcowState *s = bs->opaque; - QCowAIOCB *acb; + QCowAIOCB acb; int ret; - acb = qcow2_aio_setup(bs, sector_num, qiov, nb_sectors, NULL, NULL, 1); + qcow2_aio_setup(bs, sector_num, qiov, nb_sectors, NULL, NULL, 1, &acb); s->cluster_cache_offset = -1; /* disable compressed cache */ qemu_co_mutex_lock(&s->lock); do { - ret = qcow2_aio_write_cb(acb); + ret = qcow2_aio_write_cb(&acb); } while (ret > 0); qemu_co_mutex_unlock(&s->lock); - qemu_iovec_destroy(&acb->hd_qiov); - qemu_aio_release(acb); + qemu_iovec_destroy(&acb.hd_qiov); return ret; } -- cgit v1.2.3