tags 365754 fixed-upstream
thanks
Hello Justin,
[...]
> > Okay -- that look good. But it's strange, I'm not seeing the
> > same as you on SUSE 10.0, glibc 2.3.5. Do you have another Linux
> > to hand to test?
> I just tested on another Debian machine with the same results for
> fopen "rm".
>
> But another machine did only an anonymous mmap:
>
> 2.6.12-1-amd64-k8-smp
> glibc 2.3.6
>
> I note the following differences:
> Native POSIX Threads Library by Ulrich Drepper et al and
> libthread_db work sponsored by Alpha Processor Inc
>
> vs.
>
> linuxthreads-0.10 by Xavier Leroy (on kobun64).
>
> On a 32 bit radhat machine, the same thing; this time, linuxthreads
> and libthread_db. Linux 2.4.22-1.2199.nptl and glibc 2.3.3.
>
> Alan didn't have strace installed on a different redhat machine, so I
> copied mine, and again it didn't mmap the file. Again, linuxthreads
> and libthread_db. glibc 2.3.3, and Linux 2.6.10-1.771_FC2.
>
> I note that this functionality requires the compile-time conditional
> _G_HAVE_MMAP.
Hmmm -- it is all a bit strange. There are some other factors
going on that aren't obvious. Anyway, I've added the following
text for man-pages-2.32:
m (since glibc 2.3)
Attempt to access the file using mmap(2),
rather than I/O system calls (read(2),
write(2)). Currently, use of mmap(2) is only
attempted for a file opened for reading.
Thanks for you report and all the testing.
Cheers,
Michael
--
Michael Kerrisk
maintainer of Linux man pages Sections 2, 3, 4, 5, and 7
Want to help with man page maintenance?
Grab the latest tarball at
ftp://ftp.win.tue.nl/pub/linux-local/manpages/,
read the HOWTOHELP file and grep the source
files for 'FIXME'.
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