Common signal handler system call

[Javier Martinez Canillas]

On Sun, Mar 20, 2011 at 8:38 AM, mohit verma <mohit89mlnc at gmail.com> wrote:
>> Well, you can implement your idea as a library function too.
>> Apart from the "just for fun" factor or to learn how to implement a new
>> system call, I see no real gain to move that into kernel.
>
> I think it should be there in kernel not because it is my idea but for good
> reasons (personally think so).
>>

Hi Mohit,

A problem I see with your idea is that it is not POSIX-compliant.
Linux being a Unix-like operating system tries to adhere to the
standard as much as possible. Although is true that it is not tied to
the specification. Whenever a change has strong arguments (an more
important valid use cases) Linux can deviate from the standard.

But as Bernd says, taking to the kernel something that can be done in
users-pace with no real gain and also breaking POSIX signals semantics
is something that will be hard to merge into the kernel.

Also, to implement a syscall you have to convince not only the kernel
developers that this change makes sense but also propose a patch to
glibc to implement a function library that uses your new syscall.

Best regards,

-----------------------------------------
Javier Martínez Canillas
(+34) 682 39 81 69
PhD Student in High Performance Computing
Computer Architecture and Operating System Department (CAOS)
Universitat Autònoma de Barcelona
Barcelona, Spain