Linus Torvalds
5c2992ee7f
printk: remove console flushing special cases for partial buffered lines ...
It actively hurts proper merging, and makes for a lot of special cases.
There was a good(ish) reason for doing it originally, but it's getting
too painful to maintain. And most of the original reasons for it are
long gone.
So instead of having special code to flush partial lines to the console
(as opposed to the record buffers), do _all_ the console writing from
the record buffer, and be done with it.
If an oops happens (or some other synchronous event), we will flush the
partial lines due to the oops printing activity, so this does not affect
that. It does mean that if you have a completely hung machine, a
partial preceding line may not have been printed out.
That was some of the original reason for this complexity, in fact, back
when we used to test for the historical i386 "halt" instruction problem
by doing
pr_info("Checking 'hlt' instruction... ");
if (!boot_cpu_data.hlt_works_ok) {
pr_cont("disabled\n");
return;
}
halt();
halt();
halt();
halt();
pr_cont("OK\n");
and that model no longer works (it the 'hlt' instruction kills the
machine, the partial line won't have been flushed, so you won't even see
it).
Of course, that was also back in the days when people actually had
textual console output rather than a graphical splash-screen at bootup.
How times change..
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: Joe Perches <joe@perches.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Tested-by: Petr Mladek <pmladek@suse.com>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-12-14 21:08:18 -08:00
bpf: xdp: Allow head adjustment in XDP prog
2016-12-08 14:25:13 -05:00
config: android: enable CONFIG_SECCOMP
2016-10-11 15:06:32 -07:00
kdb: call vkdb_printf() from vprintk_default() only when wanted
2016-12-14 16:04:08 -08:00
mm: add locked parameter to get_user_pages_remote()
2016-12-14 16:04:08 -08:00
gcov: add support for gcc version >= 6
2016-07-15 14:54:27 +09:00
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-12 20:23:11 -08:00
livepatch/module: make TAINT_LIVEPATCH module-specific
2016-08-26 14:42:08 +02:00
Merge branch 'linus' into locking/core, to pick up fixes
2016-12-11 13:07:13 +01:00
Merge branch 'for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
2016-12-13 12:59:57 -08:00
printk: remove console flushing special cases for partial buffered lines
2016-12-14 21:08:18 -08:00
rcu: Don't kick unless grace period or request
2016-11-14 10:46:31 -08:00
Power management material for v4.10-rc1
2016-12-13 10:41:53 -08:00
posix-timers: give lazy compilers some help optimizing code away
2016-12-14 16:04:08 -08:00
Merge branch 'for-4.10/block' of git://git.kernel.dk/linux-block
2016-12-13 10:19:16 -08:00
Merge branch 'stable-4.10' of git://git.infradead.org/users/pcmoore/audit
2016-12-14 14:06:40 -08:00
Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/audit
2016-07-29 17:54:17 -07:00
audit: fix formatting of AUDIT_CONFIG_CHANGE events
2016-11-20 15:38:00 -05:00
audit: fix formatting of AUDIT_CONFIG_CHANGE events
2016-11-20 15:38:00 -05:00
audit: fix formatting of AUDIT_CONFIG_CHANGE events
2016-11-20 15:38:00 -05:00
audit: add support for session ID user filter
2016-11-29 15:10:12 -05:00
Merge branch 'stable-4.10' of git://git.infradead.org/users/pcmoore/audit
2016-12-14 14:06:40 -08:00
exec: Ensure mm->user_ns contains the execed files
2016-11-22 13:21:00 -06:00
cgroup: add support for eBPF programs
2016-11-25 16:25:52 -05:00
cgroup: Use lld instead of ld when printing pids controller events_limit
2016-06-21 15:03:36 -04:00
posix-timers: Make them configurable
2016-11-16 09:26:35 +01:00
hotplug: Make register and unregister notifier API symmetric
2016-12-08 10:08:41 +01:00
Merge branch 'for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2016-10-14 12:18:50 -07:00
cred: Reject inodes with invalid ids in set_create_file_as()
2016-06-30 18:05:09 -05:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-12 19:56:15 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2016-12-14 14:09:48 -08:00
freezer, oom: check TIF_MEMDIE on the correct task
2016-07-28 16:07:41 -07:00
sched/wake_q: Rename WAKE_Q to DEFINE_WAKE_Q
2016-11-21 10:29:01 +01:00
cred: simpler, 1D supplementary groups
2016-10-07 18:46:30 -07:00
hung_task: decrement sysctl_hung_task_warnings only if it is positive
2016-12-12 18:55:09 -08:00
powerpc updates for 4.8 #2
2016-08-05 09:00:54 -04:00
locking/mutex: Allow MUTEX_SPIN_ON_OWNER when DEBUG_MUTEXES
2016-10-25 11:31:51 +02:00
kcov: add more missing includes
2016-12-14 16:04:08 -08:00
kexec: allow architectures to override boot mapping
2016-08-02 19:35:27 -04:00
kexec: add cond_resched into kimage_alloc_crash_control_pages
2016-12-14 16:04:07 -08:00
kexec: fix double-free when failing to relocate the purgatory
2016-09-01 17:52:01 -07:00
kprobes: include <asm/sections.h> instead of <asm-generic/sections.h>
2016-10-11 15:06:31 -07:00
kexec: add a kexec_crash_loaded() function
2016-08-02 19:35:30 -04:00
kthread: add __printf attributes
2016-12-12 18:55:06 -08:00
Merge branch 'akpm' (patches from Andrew)
2016-12-14 17:25:18 -08:00
mm: fix cache mode of dax pmd mappings
2016-09-09 17:34:46 -07:00
Modules updates for v4.10
2016-12-14 20:12:43 -08:00
padata: Remove unused but set variables
2016-10-25 11:08:10 +08:00
taint/module: Clean up global and module taint flags handling
2016-11-26 11:18:01 -08:00
remove lots of IS_ERR_VALUE abuses
2016-05-27 15:26:11 -07:00
Merge branch 'nsfs-ioctls' into HEAD
2016-09-22 20:00:36 -05:00
profile: Convert to hotplug state machine
2016-07-15 10:41:42 +02:00
ptrace: Don't allow accessing an undumpable mm
2016-11-22 12:57:38 -06:00
relay: check array offset before using it
2016-12-14 16:04:08 -08:00
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2016-12-14 13:57:44 -08:00
signals: avoid unnecessary taking of sighand->siglock
2016-12-14 16:04:07 -08:00
kernel/smp: Tell the user we're bringing up secondary CPUs
2016-10-26 12:02:35 +02:00
kthread/smpboot: do not park in kthread_create_on_cpu()
2016-10-11 15:06:33 -07:00
softirq: Display IRQ_POLL for irq-poll statistics
2016-10-21 15:45:47 -06:00
locking/core, stop_machine: Yield the CPU during stop machine()
2016-11-16 10:15:09 +01:00
Merge branch 'akpm' (patches from Andrew)
2016-12-12 20:50:02 -08:00
x86/pkeys: Fix pkeys build breakage for some non-x86 arches
2016-09-13 14:41:36 +02:00
coredump: clarify "unsafe core_pattern" warning
2016-12-14 16:04:07 -08:00
sysctl: add KERN_CONT to deprecated_sysctl_warning()
2016-12-14 16:04:07 -08:00
task_work: use READ_ONCE/lockless_dereference, avoid pi_lock if !task_works
2016-08-02 19:35:02 -04:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-11-15 10:54:36 -05:00
torture: Convert torture_shutdown() to hrtimer
2016-08-22 10:01:49 -07:00
mntns: Add a limit on the number of mount namespaces.
2016-08-31 07:28:35 -05:00
cred: simpler, 1D supplementary groups
2016-10-07 18:46:30 -07:00
smp: Add function to execute a function synchronously on a CPU
2016-09-05 13:52:39 +02:00
Merge branch 'nsfs-ioctls' into HEAD
2016-09-22 20:00:36 -05:00
Merge branch 'nsfs-ioctls' into HEAD
2016-09-22 20:00:36 -05:00
kernel/watchdog.c: move hardlockup detector to separate file
2016-12-14 16:04:08 -08:00
kernel/watchdog.c: move hardlockup detector to separate file
2016-12-14 16:04:08 -08:00
Merge branch 'for-4.9' into for-4.10
2016-10-19 12:12:40 -04:00
5c2992ee7f