lkml.org 
[lkml]   [2017]   [Nov]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [GIT pull] printk updates for 4.15
On Tue, 14 Nov 2017, Linus Torvalds wrote:

> On Tue, Nov 14, 2017 at 2:50 PM, Thomas Gleixner <tglx@linutronix.de> wrote:
> >
> > Something like the untested patch below should do the storage and converts
> > the primary timestamp from local_clock() to clock monotonic.
>
> This may work.
>
> > - u64 ts_nsec; /* timestamp in nanoseconds */
> > + /* Timestamps in nanoseconds */
> > + union {
> > + u64 ts_nsec;
> > + struct timestamps ts;
> > + };
>
> But I'd skip the union, and just search-and-replace the ts_nsec ->
> ts.mono. You did that in at least one place anyway.
>
> Because as it is, that's just too subtle and hard to read. Don't make
> it worse by having a magical "ts_nsec is also ts.mono, but you have to
> look in two different files to see that.
>
> That file is messy enough as-is.

True. I already replaced all of them except this one:

@@ -1022,6 +1026,7 @@ void log_buf_vmcoreinfo_setup(void)
*/
VMCOREINFO_STRUCT_SIZE(printk_log);
VMCOREINFO_OFFSET(printk_log, ts_nsec);
+ VMCOREINFO_OFFSET(printk_log, ts);
VMCOREINFO_OFFSET(printk_log, len);
VMCOREINFO_OFFSET(printk_log, text_len);
VMCOREINFO_OFFSET(printk_log, dict_len);

If I remove ts_nsec completely, then the VMCORE info changes and that would
break existing tools because they search for ts_nsec and fail....

Thanks,

tglx

\
 
 \ /
  Last update: 2017-11-15 00:04    [W:0.087 / U:21.640 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site