diff options
| author | Stefan Hajnoczi <stefanha@redhat.com> | 2017-09-28 10:59:58 +0800 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2017-10-03 14:36:19 -0400 |
| commit | f708a5e71cba0d784e307334c07ade5f56f827ab (patch) | |
| tree | 8e4786bfdf43921d8ff54aa6cf279769612d184d /util/aio-posix.c | |
| parent | 5b3ac23fee97fc1a79ad2bb1cf3a1ce518d27905 (diff) | |
aio: fix assert when remove poll during destroy
After iothread is enabled internally inside QEMU with GMainContext, we
may encounter this warning when destroying the iothread:
(qemu-system-x86_64:19925): GLib-CRITICAL **: g_source_remove_poll:
assertion '!SOURCE_DESTROYED (source)' failed
The problem is that g_source_remove_poll() does not allow to remove one
source from array if the source is detached from its owner
context. (peterx: which IMHO does not make much sense)
Fix it on QEMU side by avoid calling g_source_remove_poll() if we know
the object is during destruction, and we won't leak anything after all
since the array will be gone soon cleanly even with that fd.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-id: 20170928025958.1420-6-peterx@redhat.com
[peterx: write the commit message]
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'util/aio-posix.c')
| -rw-r--r-- | util/aio-posix.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/util/aio-posix.c b/util/aio-posix.c index 2d51239ec6..5946ac09f0 100644 --- a/util/aio-posix.c +++ b/util/aio-posix.c @@ -223,7 +223,14 @@ void aio_set_fd_handler(AioContext *ctx, return; } - g_source_remove_poll(&ctx->source, &node->pfd); + /* If the GSource is in the process of being destroyed then + * g_source_remove_poll() causes an assertion failure. Skip + * removal in that case, because glib cleans up its state during + * destruction anyway. + */ + if (!g_source_is_destroyed(&ctx->source)) { + g_source_remove_poll(&ctx->source, &node->pfd); + } /* If the lock is held, just mark the node as deleted */ if (qemu_lockcnt_count(&ctx->list_lock)) { |