Messages in this thread Patch in this message | | | Date | Fri, 11 Dec 2015 13:41:59 +0100 | From | Petr Mladek <> | Subject | Re: [PATCH v3 4/4] printk/nmi: Increase the size of NMI buffer and make it configurable |
| |
On Fri 2015-12-11 12:10:02, Geert Uytterhoeven wrote: > On Wed, Dec 9, 2015 at 2:21 PM, Petr Mladek <pmladek@suse.com> wrote: > > --- a/init/Kconfig > > +++ b/init/Kconfig > > @@ -866,6 +866,28 @@ config LOG_CPU_MAX_BUF_SHIFT > > 13 => 8 KB for each CPU > > 12 => 4 KB for each CPU > > > > +config NMI_LOG_BUF_SHIFT > > + int "Temporary per-CPU NMI log buffer size (12 => 4KB, 13 => 8KB)" > > + range 10 21 > > + default 13 > > + depends on PRINTK && HAVE_NMI > > Symbol NMI_LOG_BUF_SHIFT does not exist if its dependencies are not met.
Åh, the NMI buffer is enabled on arm via NEED_PRINTK_NMI.
The buffer is compiled when CONFIG_PRINTK_NMI is defined. I am going to fix it the following way:
diff --git a/init/Kconfig b/init/Kconfig index efcff25a112d..61cfd96a3c96 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -870,7 +870,7 @@ config NMI_LOG_BUF_SHIFT int "Temporary per-CPU NMI log buffer size (12 => 4KB, 13 => 8KB)" range 10 21 default 13 - depends on PRINTK && HAVE_NMI + depends on PRINTK_NMI help Select the size of a per-CPU buffer where NMI messages are temporary stored. They are copied to the main log buffer in a safe context
Thanks a lot for report, Petr
| |