On 05/15/2014 07:21 AM, Darren Hart wrote: > On 5/14/14, 17:18, "H. Peter Anvin" <hpa@xxxxxxxxx> wrote: > >> On 05/14/2014 09:18 AM, Darren Hart wrote: >>> >>> However, unless I'm sorely mistaken, the larger problem is that glibc >>> removed the futex() call entirely, so these man pages don't describe >>> something users even have access to anymore. I had to revert to calling >>> the syscalls directly in the futextest test suite because of this: >>> >>> >>> http://git.kernel.org/cgit/linux/kernel/git/dvhart/futextest.git/tree/inc >>> lu >>> de/futextest.h#n67 >>> >> >> This really comes down to the fact that we should have a libinux which >> contains the basic system call wrapper machinery for Linux specific >> things and nothing else. >> >> syscall(3) is toxic and breaks randomly on some platforms. > > Peter Z and I have had a good time discussing this in the past.... And > here it is again. :-) People have a number of times noted that there are problems with syscall(), but I'm not knowledgeable on the details. I'd happily take a patch to the man page (which, for historical reasons, is actually syscall(2)) that explains the the problems (and ideally notes those platforms where there are no problems). Thanks, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
