This says it all.  1min 22secs to generate a patch from a locally
modified but uncommitted file.

cp, edit, diff would be several orders of magnitude faster.  What's
going on?

$ /usr/bin/time cg-diff drivers/serial/8250.c > o
Command exited with non-zero status 1
14.40user 17.47system 1:22.96elapsed 38%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (180major+14692minor)pagefaults 0swaps

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -2333,6 +2333,7 @@ static int __devinit serial8250_probe(st
                        dev_err(dev, "unable to register port at index %d "
                                "(IO%lx MEM%lx IRQ%d): %d\n", i,
                                p->iobase, p->mapbase, p->irq, ret);
+                       printk(KERN_ERR "uartclk was %d\n", port.uartclk);
        return 0;

Russell King

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