Re: [PATCH] task_struct: remove writeonly counters
From: Alexey Dobriyan
Date: Tue Aug 01 2006 - 00:10:21 EST
On Mon, Jul 31, 2006 at 09:01:07PM -0700, Andrew Morton wrote:
> On Tue, 1 Aug 2006 06:29:51 +0400
> Alexey Dobriyan <adobriyan@xxxxxxxxx> wrote:
> > ...
> > +++ b/include/linux/sched.h
> > @@ -962,8 +962,6 @@ #endif
> > * to a stack based synchronous wait) if its doing sync IO.
> > */
> > wait_queue_t *io_wait;
> > -/* i/o counters(bytes read/written, #syscalls */
> > - u64 rchar, wchar, syscr, syscw;
> This is kinda funny. These fields were added a year and a half ago, with
> the intention that the info be made available to userspace. But then
> things got horridly stuck. It's only in the past couple of weeks that we've
> gained appropriate reporting-to-userspace infrastructure to be able to use
> these fields.
> And lo, on the very day when you propose removing these fields, Jay posts a
> new patchset ("add CSA accounting to taskstats") which finally gets around to
> using them.
*cough* That was a coincidence, I assure you.
> So.. we should keep these fields for now - we can perhaps remove them (in
> less than 1.5 years) if for some reason the CSA patches crash and burn (I
> don't think they will).
Perhaps, Jay can properly ifdef them with CONFIG_CSA_ACCT or something?
And remove in-file changelogs 'cause there is git?
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/