Description of problem: According to the man page, grep --mmap is supposed to work. And it does indeed on my Ubuntu installation. Version-Release number of selected component (if applicable): How reproducible: grep --mmap $USER /etc/passwd Steps to Reproduce: 1. 2. 3. Actual results: $ grep --mmap $USER /etc/passwd Usage: grep [OPTION]... PATTERN [FILE]... Try `grep --help' for more information. $ Expected results: $USER Additional info:
Thanks for report. Please note that the --mmap option is deprecated and should be ignored. This behaviour was implemented in rawhide and will be presented in F14. Upstream bugzilla: http://savannah.gnu.org/bugs/?29614 *** This bug has been marked as a duplicate of bug 583895 ***