Opened 15 years ago
Closed 15 years ago
#5421 closed bug (fixed)
kernel_daemons are called with the lock held
| Reported by: | axeld | Owned by: | axeld |
|---|---|---|---|
| Priority: | normal | Milestone: | R1 |
| Component: | System/Kernel | Version: | R1/Development |
| Keywords: | Cc: | ||
| Blocked By: | Blocking: | #5462 | |
| Platform: | All |
Description
This does cause trouble with the legacy driver implementation, since that one calls init_driver() with the driver lock held -- if that registers a kernel daemon (like the floppy driver), a deadlock may happen.
The solution would be to either not lock when calling into the driver, or changing the kernel daemon not to lock when calling the functions.
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(In #5462) In such cases please get a stack trace of the "main2" thread and, even better, try to find out why it doesn't continue.
In qemu pressing Alt-Sysreq-D doesn't work. You have to press (left) Ctrl-Alt-2 to enter the qemu monitor and execute the command
sendkey alt-sysrq-d(no typo, it's really "sysrq"). Get back via Ctrl-Alt-1.Anyway, I've seen something like this a few times already and it was always #5421. Just from the syslog its not possible to verify or disprove it, so I'm closing the ticket as a duplicate. Please reopen, when you encounter it next time and can retrieve information that suggests otherwise.