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-rw-r--r--block/raw-posix.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/block/raw-posix.c b/block/raw-posix.c
index cc1b874..3a527f0 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -519,7 +519,16 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
"future QEMU versions.\n",
bs->filename);
}
-#endif
+#else
+ if (bdrv_flags & BDRV_O_NATIVE_AIO) {
+ error_printf("WARNING: aio=native was specified for '%s', but "
+ "is not supported in this build. Falling back to "
+ "aio=threads.\n"
+ " This will become an error condition in "
+ "future QEMU versions.\n",
+ bs->filename);
+ }
+#endif /* !defined(CONFIG_LINUX_AIO) */
s->has_discard = true;
s->has_write_zeroes = true;
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