diff options
Diffstat (limited to 'block/file-posix.c')
| -rw-r--r-- | block/file-posix.c | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/block/file-posix.c b/block/file-posix.c index 07bb061fe4..43b963b13e 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -545,11 +545,17 @@ static int raw_open_common(BlockDriverState *bs, QDict *options, #ifdef CONFIG_LINUX_AIO /* Currently Linux does AIO only for files opened with O_DIRECT */ - if (s->use_linux_aio && !(s->open_flags & O_DIRECT)) { - error_setg(errp, "aio=native was specified, but it requires " - "cache.direct=on, which was not specified."); - ret = -EINVAL; - goto fail; + if (s->use_linux_aio) { + if (!(s->open_flags & O_DIRECT)) { + error_setg(errp, "aio=native was specified, but it requires " + "cache.direct=on, which was not specified."); + ret = -EINVAL; + goto fail; + } + if (!aio_setup_linux_aio(bdrv_get_aio_context(bs), errp)) { + error_prepend(errp, "Unable to use native AIO: "); + goto fail; + } } #else if (s->use_linux_aio) { @@ -1723,6 +1729,22 @@ static BlockAIOCB *raw_aio_flush(BlockDriverState *bs, return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); } +static void raw_aio_attach_aio_context(BlockDriverState *bs, + AioContext *new_context) +{ +#ifdef CONFIG_LINUX_AIO + BDRVRawState *s = bs->opaque; + if (s->use_linux_aio) { + Error *local_err; + if (!aio_setup_linux_aio(new_context, &local_err)) { + error_reportf_err(local_err, "Unable to use native AIO, " + "falling back to thread pool: "); + s->use_linux_aio = false; + } + } +#endif +} + static void raw_close(BlockDriverState *bs) { BDRVRawState *s = bs->opaque; @@ -2601,6 +2623,7 @@ BlockDriver bdrv_file = { .bdrv_refresh_limits = raw_refresh_limits, .bdrv_io_plug = raw_aio_plug, .bdrv_io_unplug = raw_aio_unplug, + .bdrv_attach_aio_context = raw_aio_attach_aio_context, .bdrv_truncate = raw_truncate, .bdrv_getlength = raw_getlength, |