[lkml]   [2006]   [Mar]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [Patch 3/9] Block I/O accounting initialization

> +static inline void delayacct_blkio_start(void)
> +{
> + if (unlikely(delayacct_on))
> + __delayacct_blkio_start();
> +}

I still think the unlikely() makes no sense here; at runtime it's either
going to be always on or off (in the sense that switching it will be
RARE). The cpus branch predictor will get that right; while if you force
it unlikely you can even run the risk of getting a 100% miss on some
architectures (not x86/x86-64) when you enable the accounting

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2006-03-15 11:29    [W:0.184 / U:0.852 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site