Hello, After several RFC series [0][1][2][3][4], here is the first set of patches to rework the printk subsystem. This first set of patches only replace the existing ringbuffer implementation. No locking is removed. No semantics/behavior of printk are changed. The VMCOREINFO is updated, which will require changes to the external crash [5] tool. I will be preparing a patch to add support for the new VMCOREINFO. This series is in line with the agreements [6] made at the meeting during LPC2019 in Lisbon, with 1 exception: support for dictionaries will _not_ be discontinued [7]. Dictionaries are stored in a separate buffer so that they cannot interfere with the human-readable buffer. John Ogness [0] https://lkml.kernel.org/r/20190212143003.48446-1-john.ogness@xxxxxxxxxxxxx [1] https://lkml.kernel.org/r/20190607162349.18199-1-john.ogness@xxxxxxxxxxxxx [2] https://lkml.kernel.org/r/20190727013333.11260-1-john.ogness@xxxxxxxxxxxxx [3] https://lkml.kernel.org/r/20190807222634.1723-1-john.ogness@xxxxxxxxxxxxx [4] https://lkml.kernel.org/r/20191128015235.12940-1-john.ogness@xxxxxxxxxxxxx [5] https://github.com/crash-utility/crash [6] https://lkml.kernel.org/r/87k1acz5rx.fsf@xxxxxxxxxxxxx [7] https://lkml.kernel.org/r/20191007120134.ciywr3wale4gxa6v@xxxxxxxxxxxxxxx John Ogness (2): printk: add lockless buffer printk: use the lockless ringbuffer include/linux/kmsg_dump.h | 2 - kernel/printk/Makefile | 1 + kernel/printk/printk.c | 836 +++++++++--------- kernel/printk/printk_ringbuffer.c | 1370 +++++++++++++++++++++++++++++ kernel/printk/printk_ringbuffer.h | 328 +++++++ 5 files changed, 2114 insertions(+), 423 deletions(-) create mode 100644 kernel/printk/printk_ringbuffer.c create mode 100644 kernel/printk/printk_ringbuffer.h -- 2.20.1 _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
