From: Daniel P. Berrangé <berra...@redhat.com> The 'pty_chr_read' method has a 4k byte array used for copying data between the PTY and device. Skip the automatic zero-init of this array to eliminate the performance overhead in the I/O hot path.
The 'buf' array will be fully initialized when reading data off the PTY. Signed-off-by: Daniel P. Berrangé <berra...@redhat.com> Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com> Message-id: 20250610123709.835102-6-berra...@redhat.com Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com> --- chardev/char-pty.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chardev/char-pty.c b/chardev/char-pty.c index c28554e6e0..674e9b3f14 100644 --- a/chardev/char-pty.c +++ b/chardev/char-pty.c @@ -154,7 +154,7 @@ static gboolean pty_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) Chardev *chr = CHARDEV(opaque); PtyChardev *s = PTY_CHARDEV(opaque); gsize len; - uint8_t buf[CHR_READ_BUF_LEN]; + QEMU_UNINITIALIZED uint8_t buf[CHR_READ_BUF_LEN]; ssize_t ret; len = sizeof(buf); -- 2.49.0