mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

file-posix: Avoid aio_worker() for QEMU_AIO_COPY_RANGE

Browse Source 
aio_worker() doesn't add anything interesting, it's only a useless
indirection. Call the handler function directly instead.

As we know that this handler function is only called from coroutine
context and the coroutine stays around until the worker thread finishes,
we can keep RawPosixAIOData on the stack.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2018-10-25 14:18:58 +01:00
parent 29cb4c01e7
commit 58a209c437
1 changed files with 17 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
block/file-posix.c
View File

@ -1572,8 +1572,9 @@ static off_t copy_file_range(int in_fd, off_t *in_off, int out_fd,
}
#endif
static ssize_t handle_aiocb_copy_range(RawPosixAIOData *aiocb)
static int handle_aiocb_copy_range(void *opaque)
{
RawPosixAIOData *aiocb = opaque;
uint64_t bytes = aiocb->aio_nbytes;
off_t in_off = aiocb->aio_offset;
off_t out_off = aiocb->copy_range.aio_offset2;
@ -1810,8 +1811,6 @@ static int aio_worker(void *arg)
ret = handle_aiocb_write_zeroes_unmap(aiocb);
break;
case QEMU_AIO_COPY_RANGE:
ret = handle_aiocb_copy_range(aiocb);
break;
case QEMU_AIO_TRUNCATE:
g_assert_not_reached();
default:
@ -2714,6 +2713,7 @@ static int coroutine_fn raw_co_copy_range_to(BlockDriverState *bs,
BdrvRequestFlags read_flags,
BdrvRequestFlags write_flags)
{
RawPosixAIOData acb;
BDRVRawState *s = bs->opaque;
BDRVRawState *src_s;
@ -2726,8 +2726,20 @@ static int coroutine_fn raw_co_copy_range_to(BlockDriverState *bs,
if (fd_open(src->bs) < 0 || fd_open(dst->bs) < 0) {
return -EIO;
}
return paio_submit_co_full(bs, src_s->fd, src_offset, s->fd, dst_offset,
NULL, bytes, QEMU_AIO_COPY_RANGE);
acb = (RawPosixAIOData) {
.bs = bs,
.aio_type = QEMU_AIO_COPY_RANGE,
.aio_fildes = src_s->fd,
.aio_offset = src_offset,
.aio_nbytes = bytes,
.copy_range = {
.aio_fd2 = s->fd,
.aio_offset2 = dst_offset,
},
};
return raw_thread_pool_submit(bs, handle_aiocb_copy_range, &acb);
}
BlockDriver bdrv_file = {