[Bug 97299] Lag on terminal with compositing after 1f6dfc9

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97299

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
To isolate the changes:

diff --git a/src/sna/sna_accel.c b/src/sna/sna_accel.c
index 05007bc..4726067 100644
--- a/src/sna/sna_accel.c
+++ b/src/sna/sna_accel.c
@@ -17385,7 +17385,7 @@ sna_flush_callback(CallbackListPtr *list, pointer
user_data, pointer call_data)
 {
        struct sna *sna = user_data;

-       if (!sna->needs_dri_flush)
+       if (!sna->needs_dri_flush && 0)
                return;

        sna_accel_flush(sna);

should be equivalent to reverting the dri portion. That's worth double checking
to see if the dri or shm halves.

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