[PATCH next v1 0/3] printk: remove safe buffers
flat view
STALE2041d
SUPERSEDED
From: John Ogness <john.ogness@linutronix.de>
Date: 2021-03-16 23:34:15
Also in:
kexec, lkml
Subsystem:
kexec, library code, linux for powerpc (32-bit and 64-bit), printk, the rest · Maintainers:
Andrew Morton, Baoquan He, Mike Rapoport, Pasha Tatashin, Pratyush Yadav, Madhavan Srinivasan, Petr Mladek, John Ogness, Linus Torvalds
Status: Superseded by v4 (posted 2021-07-15). [go to v4]
Revision v1 (4 revisions archived).
Revisions (4)
Hello, Here is v1 of a series to remove the safe buffers. They are no longer needed because messages can be stored directly into the log buffer from any context. However, the safe buffers also provided a form of recursion protection. For that reason, explicit recursion protection is also implemented for this series. This series falls in line with the printk-rework plan as presented [0] at Linux Plumbers in Lisbon 2019. This series is based on next-20210316. John Ogness [0] https://linuxplumbersconf.org/event/4/contributions/290/attachments/276/463/lpc2019_jogness_printk.pdf (slide 23) John Ogness (3): printk: track/limit recursion printk: remove safe buffers printk: convert @syslog_lock to spin_lock arch/powerpc/kernel/traps.c | 1 - arch/powerpc/kernel/watchdog.c | 5 - include/linux/printk.h | 10 - kernel/kexec_core.c | 1 - kernel/panic.c | 3 - kernel/printk/internal.h | 2 - kernel/printk/printk.c | 171 +++++++++-------- kernel/printk/printk_safe.c | 332 +-------------------------------- lib/nmi_backtrace.c | 6 - 9 files changed, 100 insertions(+), 431 deletions(-) -- 2.20.1