Adding Kirill Korotaev and Heiko Carstens to CC.
>>>>> On Thu, 08 Sep 2005 01:24:50 +0900 (JST), Atsushi Nemoto <[email protected]> said:
anemo> On Linux/MIPS, a simple test program can create unkillable
anemo> process. The "sigkill priority fix" was introduced in 2.6.12,
anemo> but it does not effective for signals sent by force_sig() in
anemo> kernel. For detailed behavior and testcase, please look at
anemo> this thread in linux-mips ML:
This is fixed by another way in 2.6.14-rc1 for i386 (Thanks, Roland).
The changelog line is:
> [PATCH] i386: Don't miss pending signals returning to user mode after signal processing
> Signed-off-by: Roland McGrath <[email protected]>
And now similar fix for mips is already in Linux/MIPS CVS tree too.
--- linux-mips/arch/mips/kernel/entry.S 2005-03-04 22:17:29.000000000 +0900
+++ linux/arch/mips/kernel/entry.S 2005-09-16 01:04:52.365022536 +0900
@@ -105,7 +105,7 @@
move a0, sp
li a1, 0
jal do_notify_resume # a2 already loaded
- j restore_all
+ j resume_userspace
FEXPORT(syscall_exit_work_partial)
SAVE_STATIC
I suppose the original problem on s390 (reported by Heiko Carstens)
could be fixed same way. Then 'sigkill priority fix' would be
reverted safely.
---
Atsushi Nemoto
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