kernel_optimize_test/kernel/printk
John Ogness cfe2790b16 printk: move printk_info into separate array
The majority of the size of a descriptor is taken up by meta data,
which is often not of interest to the ringbuffer (for example,
when performing state checks). Since descriptors are often
temporarily stored on the stack, keeping their size minimal will
help reduce stack pressure.

Rather than embedding the printk_info into the descriptor, create
a separate printk_info array. The index of a descriptor in the
descriptor array corresponds to the printk_info with the same
index in the printk_info array. The rules for validity of a
printk_info match the existing rules for the data blocks: the
descriptor must be in a consistent state.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20200918223421.21621-2-john.ogness@linutronix.de
2020-09-22 11:09:42 +02:00
..
braille.c printk: Replace strncmp() with str_has_prefix() 2019-08-16 09:54:08 +02:00
braille.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
console_cmdline.h printk: Fix preferred console selection with multiple matches 2020-02-18 09:34:42 +01:00
internal.h printk: Prepare for nested printk_nmi_enter() 2020-05-19 15:51:16 +02:00
Makefile printk: add lockless ringbuffer 2020-07-10 08:48:19 +02:00
printk_ringbuffer.c printk: move printk_info into separate array 2020-09-22 11:09:42 +02:00
printk_ringbuffer.h printk: move printk_info into separate array 2020-09-22 11:09:42 +02:00
printk_safe.c One more printk change for 5.8 2020-06-12 12:13:36 -07:00
printk.c printk: move printk_info into separate array 2020-09-22 11:09:42 +02:00