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| author | Jeff Dike <jdike@addtoit.com> | 2006-09-25 23:33:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-26 08:49:07 -0700 |
| commit | 6edf428ed177e333863a8e5c37751a9ec176f241 (patch) | |
| tree | cf7f3e70f4898d55dbbdbd982353057e4ef3babd /arch/um | |
| parent | 6b7aaad9ba4f2a059a70014be12a921eceebfc47 (diff) | |
| download | op-kernel-dev-6edf428ed177e333863a8e5c37751a9ec176f241.zip op-kernel-dev-6edf428ed177e333863a8e5c37751a9ec176f241.tar.gz | |
[PATCH] uml: Improve SIGBUS diagnostics
UML can get a SIGBUS anywhere if the tmpfs mount being used for its memory
runs out of space. This patch adds a printk before the panic to provide a
clue as to what likely went wrong.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/kernel/trap.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c index ac70fa5..e5eeaf2 100644 --- a/arch/um/kernel/trap.c +++ b/arch/um/kernel/trap.c @@ -227,9 +227,16 @@ void bad_segv(struct faultinfo fi, unsigned long ip) void relay_signal(int sig, union uml_pt_regs *regs) { - if(arch_handle_signal(sig, regs)) return; - if(!UPT_IS_USER(regs)) + if(arch_handle_signal(sig, regs)) + return; + + if(!UPT_IS_USER(regs)){ + if(sig == SIGBUS) + printk("Bus error - the /dev/shm or /tmp mount likely " + "just ran out of space\n"); panic("Kernel mode signal %d", sig); + } + current->thread.arch.faultinfo = *UPT_FAULTINFO(regs); force_sig(sig, current); } |
