systemd real-time signals choices clash with Linux/PARISC available SIGRT range, WAS: fanotify_mark()

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On Mon, 26 Aug 2013 18:37:54 -0400
John David Anglin <dave.anglin@xxxxxxxx> wrote:

> On 26-Aug-13, at 5:27 PM, Helge Deller wrote:
> >> [1] Sneak preview: https://bugs.gentoo.org/show_bug.cgi?id=482214
> >
> > Did you already filed this signal-problem upstream as suggested in  
> > comment #3 (https://bugs.gentoo.org/show_bug.cgi?id=482214#c3)?

Well, there are two ways to resolve this problem, and seeing who is
developing systemd and seeing the generous way the "available" signal
range is used, I'm pretty doubtful about changes there.

As I said in comment #2, that range could be compacted (a lot) and then
fit easily on any future platform. Since it was a design choice even
reflected in man pages[1] ("[...], SIGRTMIN+29   Sets the log level to
[...]"), I'm very afraid they will not change it easily.

> I believe two of the signal numbers come from HP-UX.

#define SIGXCPU         33
#define SIGXFSZ         34
#define SIGSTKFLT       36

According to [2], SIGSTKFLT isn't used.

Do we still support HP-UX? I have never seen a binary for it I could
try with, but then maybe I never went looking for one, either. :)


     jer


[1] http://www.freedesktop.org/software/systemd/man/systemd.html
[2]
http://h21007.www2.hp.com/portal/download/files/unprot/STK/Linux_STK/impacts/i60.html
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