[lkml]   [2016]   [May]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [RFC][PATCH] printk: Add option to append kernel version to the dict
On Fri, May 13, 2016 at 10:58 PM, Calvin Owens <> wrote:
> We use netconsole to collect kernel logs from all the servers at
> Facebook. We use this patch internally so each logline has a record of
> which kernel version emitted it.
> At first glance, this might seem lazy: as you would expect, we have a
> database which records which kernel version a host is currently running.
> But there are a lot of situations where that database cannot be current:
> early-ish boot crashes are probably the best example, but even beyond
> that there are lots of varieties of kernel brokenness that can prevent
> the database from being updated. Doing it explicitly this way ensures
> that we always know exactly what version emitted a given message.
> Doing it in printk() itself rather than extended netconsole ends up
> being much simpler, and has the advantage that future extended console
> implementations will be able to benefit from this as well.
> Signed-off-by: Calvin Owens <>
> ---
> init/Kconfig | 8 ++++++++
> kernel/printk/printk.c | 14 ++++++++++++++
> 2 files changed, 22 insertions(+)

I don't think adding a new config option is appropriate.
How about adding a log format string tunable to netconsole?


 \ /
  Last update: 2016-05-15 00:41    [W:0.070 / U:0.412 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site