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SubjectRe: mmap, SIGBUS, and handling it
   From: "Maciej W. Rozycki" <>
Date: Fri, 10 May 2002 19:03:19 +0200 (MET DST)

On Fri, 10 May 2002, David S. Miller wrote:

> If we reexecute the instruction it will take the signal endlessly,
> forever. That makes no sense.

It depends on an application. It certainly shouldn't be the default, but
a user may choose such an option for some reason. E.g. for debugging a
system with an ICE or a similar tool.

He's talking about how SIG_IGN should behave.

If you want non-default behavior, specify a signal handler instead

> So my original point I was trying to make, which still stands, is that
> what is being requested is totally rediculious behavior, trying to
> ignore a page fault that can't be serviced.

Why should we enforce policy on a user? If one wants to ignore such
signals for whatever reason, let him do that.

We don't specify any policy other than the behavior of SIG_IGN which
is to kill off the process for SIGBUS.

If you specify a handler you can have SIGBUS do whatever you want it
to. There are no enforced limitations, only a specified behavior
for SIG_IGN when used for SIGBUS.

The original poster has solved his problem, yet you continue to argue
one and on and on.
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