Avoid entering the slow path of qemu_lockcnt_dec_and_lock if
no bottom half has to be deleted.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-id:
20170112180800.21085-11-pbonzini@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
{
QEMUBH *bh, **bhp, *next;
int ret;
+ bool deleted = false;
qemu_lockcnt_inc(&ctx->list_lock);
bh->idle = 0;
aio_bh_call(bh);
}
+ if (bh->deleted) {
+ deleted = true;
+ }
}
/* remove deleted bhs */
+ if (!deleted) {
+ qemu_lockcnt_dec(&ctx->list_lock);
+ return ret;
+ }
+
if (qemu_lockcnt_dec_and_lock(&ctx->list_lock)) {
bhp = &ctx->first_bh;
while (*bhp) {
}
qemu_lockcnt_unlock(&ctx->list_lock);
}
-
return ret;
}