Fernando, Do you know when (which kernel version) this change in behavior occurred? Cheers, Michael Fernando Luis Vázquez Cao wrote: > It used to be true that the command line arguments were not accessible > when the process had been swapped out. In ancient kernels (circa 2.0.*) > the problem was that the kernel relied on get_phys_addr to access the > user space buffer, which stopped working as soon as the process was > swapped out. Recent kernels use get_user_pages for the same purpose and > thus they should not have that limitation. > > Signed-off-by: Fernando Luis Vazquez Cao <fernando@xxxxxxxxxxxxx> > --- > > --- proc.5.orig 2008-02-06 14:11:58.000000000 +0900 > +++ proc.5 2008-02-06 14:56:22.000000000 +0900 > @@ -87,12 +87,11 @@ plus one \fIunsigned long\fP value for e > The last entry contains two zeros. > .TP > .I /proc/[number]/cmdline > -This holds the complete command line for the process, unless the whole > -process has been swapped out or the process is a zombie. > -In either of these latter cases, there is nothing in this file: > -that is, a read on this file will return 0 characters. > -The command line arguments appear in this file as a set of > -null-separated strings, with a further null byte after the last string. > +This holds the complete command line for the process, unless the process is a > +zombie. In the latter case, there is nothing in this file: that is, a read on > +this file will return 0 characters. The command line arguments appear in this > +file as a set of null-separated strings, with a further null byte after the > +last string. > .TP > .I /proc/[number]/cwd > This is a symbolic link to the current working directory of the process. > > > -- Michael Kerrisk Maintainer of the Linux man-pages project http://www.kernel.org/doc/man-pages/ Want to report a man-pages bug? Look here: http://www.kernel.org/doc/man-pages/reporting_bugs.html - To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
