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| author | Petr Mladek <pmladek@suse.com> | 2022-06-23 16:51:52 +0200 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2022-06-23 18:41:40 +0200 |
| commit | 20fb0c8272bbb102d15bdd11aa64f828619dd7cc (patch) | |
| tree | 3c805018c62d4e31aa50fbe1dd0572656aec300e /kernel/printk/printk.c | |
| parent | printk: Wait for the global console lock when the system is going down (diff) | |
| download | linux-20fb0c8272bbb102d15bdd11aa64f828619dd7cc.tar.xz linux-20fb0c8272bbb102d15bdd11aa64f828619dd7cc.zip | |
Revert "printk: Wait for the global console lock when the system is going down"
This reverts commit b87f02307d3cfbda768520f0687c51ca77e14fc3.
The testing of 5.19 release candidates revealed missing synchronization
between early and regular console functionality.
It would be possible to start the console kthreads later as a workaround.
But it is clear that console lock serialized console drivers between
each other. It opens a big area of possible problems that were not
considered by people involved in the development and review.
printk() is crucial for debugging kernel issues and console output is
very important part of it. The number of consoles is huge and a proper
review would take some time. As a result it need to be reverted for 5.19.
Link: https://lore.kernel.org/r/YrBdjVwBOVgLfHyb@alley
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20220623145157.21938-2-pmladek@suse.com
Diffstat (limited to 'kernel/printk/printk.c')
| -rw-r--r-- | kernel/printk/printk.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index b095fb5f5f61..45c6c2b0b104 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -250,9 +250,6 @@ static atomic_t console_kthreads_active = ATOMIC_INIT(0); #define console_kthread_printing_exit() \ atomic_dec(&console_kthreads_active) -/* Block console kthreads to avoid processing new messages. */ -bool block_console_kthreads; - /* * Helper macros to handle lockdep when locking/unlocking console_sem. We use * macros instead of functions so that _RET_IP_ contains useful information. @@ -3733,7 +3730,6 @@ static bool printer_should_wake(struct console *con, u64 seq) if (con->blocked || console_kthreads_atomically_blocked() || - block_console_kthreads || system_state > SYSTEM_RUNNING || oops_in_progress) { return false; |