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| author | Mike Travis <travis@sgi.com> | 2011-05-24 17:13:20 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-25 08:39:48 -0700 |
| commit | 162a7e7500f9664636e649ba59defe541b7c2c60 (patch) | |
| tree | f44d4e480975d7f2c4bd4fd8625dbdb81eb04ade /include/linux/printk.h | |
| parent | 95dde501907b06e7203c74f8435acfdab9eb2659 (diff) | |
| download | linux-162a7e7500f9664636e649ba59defe541b7c2c60.tar.gz linux-162a7e7500f9664636e649ba59defe541b7c2c60.tar.bz2 linux-162a7e7500f9664636e649ba59defe541b7c2c60.zip | |
printk: allocate kernel log buffer earlier
On larger systems, because of the numerous ACPI, Bootmem and EFI messages,
the static log buffer overflows before the larger one specified by the
log_buf_len param is allocated. Minimize the overflow by allocating the
new log buffer as soon as possible.
On kernels without memblock, a later call to setup_log_buf from
kernel/init.c is the fallback.
[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix CONFIG_PRINTK=n build]
Signed-off-by: Mike Travis <travis@sgi.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/printk.h')
| -rw-r--r-- | include/linux/printk.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/printk.h b/include/linux/printk.h index ee048e77e1ae..0101d55d9651 100644 --- a/include/linux/printk.h +++ b/include/linux/printk.h @@ -1,6 +1,8 @@ #ifndef __KERNEL_PRINTK__ #define __KERNEL_PRINTK__ +#include <linux/init.h> + extern const char linux_banner[]; extern const char linux_proc_banner[]; @@ -113,6 +115,7 @@ extern int dmesg_restrict; extern int kptr_restrict; void log_buf_kexec_setup(void); +void __init setup_log_buf(int early); #else static inline __attribute__ ((format (printf, 1, 0))) int vprintk(const char *s, va_list args) @@ -137,6 +140,10 @@ static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies, static inline void log_buf_kexec_setup(void) { } + +static inline void setup_log_buf(int early) +{ +} #endif extern void dump_stack(void) __cold; |