[PATCH 0/9] Add blockconsole version 1.1 (try 2)

From: Joern Engel
Date: Thu Feb 28 2013 - 18:04:25 EST

Blockconsole is a console driver very roughly similar to netconsole.
Instead of sending messages out via UDP, they are written to a block
device. Typically a USB stick is chosen, although in principle any
block device will do.

In most cases blockconsole is useful where netconsole is not, i.e.
single machines without network access or without an accessable
netconsole capture server. When using both blockconsole and
netconsole, I have found netconsole to sometimes create a mess under
high message load (sysrq-t, etc.) while blockconsole does not.

Most importantly, a number of bugs were identified and fixed that
would have been unexplained machine reboots without blockconsole.

More highlights:
* reasonably small and self-contained code,
* some 100+ machine years of runtime,
* nice tutorial with a 30-sec guide for the impatient.

Special thanks to Borislav Petkov for many improvements and kicking my
behind to provide a proper git tree and resend patches.

A number of cleanup patches could be folded into the main patch, but I
decided not to mess with git history and leave any further mistakes
for the world to laugh at:

Joern Engel (8):
do_mounts: constify name_to_dev_t parameter
add blockconsole version 1.1
printk: add CON_ALLDATA console flag
netconsole: use CON_ALLDATA
blockconsole: use CON_ALLDATA
bcon: add a release work struct
bcon: check for hdparm in bcon_tail
bcon: remove version 1.0 support

Takashi Iwai (1):
blockconsole: Allow to pass a device file path to bcon_tail

Documentation/block/blockconsole.txt | 94 ++++
Documentation/block/blockconsole/bcon_tail | 82 +++
Documentation/block/blockconsole/mkblockconsole | 29 ++
block/partitions/Makefile | 1 +
block/partitions/blockconsole.c | 22 +
block/partitions/check.c | 3 +
block/partitions/check.h | 3 +
drivers/block/Kconfig | 6 +
drivers/block/Makefile | 1 +
drivers/block/blockconsole.c | 617 +++++++++++++++++++++++
drivers/net/netconsole.c | 2 +-
include/linux/blockconsole.h | 7 +
include/linux/console.h | 1 +
include/linux/mount.h | 2 +-
init/do_mounts.c | 2 +-
kernel/printk.c | 5 +-
16 files changed, 872 insertions(+), 5 deletions(-)
create mode 100644 Documentation/block/blockconsole.txt
create mode 100755 Documentation/block/blockconsole/bcon_tail
create mode 100755 Documentation/block/blockconsole/mkblockconsole
create mode 100644 block/partitions/blockconsole.c
create mode 100644 drivers/block/blockconsole.c
create mode 100644 include/linux/blockconsole.h


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