[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>
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@ -227,9 +227,16 @@ void bad_segv(struct faultinfo fi, unsigned long ip)
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void relay_signal(int sig, union uml_pt_regs *regs)
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{
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if(arch_handle_signal(sig, regs)) return;
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if(!UPT_IS_USER(regs))
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if(arch_handle_signal(sig, regs))
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return;
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if(!UPT_IS_USER(regs)){
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if(sig == SIGBUS)
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printk("Bus error - the /dev/shm or /tmp mount likely "
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"just ran out of space\n");
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panic("Kernel mode signal %d", sig);
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}
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current->thread.arch.faultinfo = *UPT_FAULTINFO(regs);
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force_sig(sig, current);
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}
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