Messages in this thread | | | Date | Mon, 15 Sep 2008 11:58:38 +0200 | From | Pavel Machek <> | Subject | Re: [PATCH] introduce boot_printk() |
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On Mon 2008-09-15 01:05:16, Yinghai Lu wrote: > could be enabled via "boot=verbose" to get more debug info > > will use it to convert some printk(KERN_DEBUG ...) > > Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
boot= is a bit too generic name, I guess... Pavel
> --- > include/linux/kernel.h | 19 +++++++++++++++++++ > kernel/printk.c | 21 +++++++++++++++++++++ > 2 files changed, 40 insertions(+) > > Index: linux-2.6/include/linux/kernel.h > =================================================================== > --- linux-2.6.orig/include/linux/kernel.h > +++ linux-2.6/include/linux/kernel.h > @@ -344,6 +344,25 @@ static inline char *pack_hex_byte(char * > #endif > > /* > + * Debugging macros > + */ > +#define BOOT_QUIET 0 > +#define BOOT_VERBOSE 1 > +#define BOOT_SPEW 2 > + > +extern int boot_verbosity; > +/* > + * Define the default level of output to be very little > + * This can be turned up by using boot=verbose for more > + * information and boot=spew for _lots_ of information. > + * boot_verbosity is defined in printk.c > + */ > +#define boot_printk(v, s, a...) do { \ > + if ((v) <= boot_verbosity) \ > + printk(s, ##a); \ > + } while (0) > + > +/* > * Display an IP address in readable format. > */ > > Index: linux-2.6/kernel/printk.c > =================================================================== > --- linux-2.6.orig/kernel/printk.c > +++ linux-2.6/kernel/printk.c > @@ -604,6 +604,27 @@ asmlinkage int printk(const char *fmt, . > return r; > } > > +int boot_verbosity; > + > +static int __init boot_set_verbosity(char *arg) > +{ > + if (!arg) > + return -EINVAL; > + > + if (strcmp("spew", arg) == 0) > + boot_verbosity = BOOT_SPEW; > + else if (strcmp("verbose", arg) == 0) > + boot_verbosity = BOOT_VERBOSE; > + else { > + printk(KERN_WARNING "boot Verbosity level %s not recognised" > + " use boot=verbose or boot=spew\n", arg); > + return -EINVAL; > + } > + > + return 0; > +} > +early_param("boot", boot_set_verbosity); > + > /* cpu currently holding logbuf_lock */ > static volatile unsigned int printk_cpu = UINT_MAX; > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
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