The patch titled Subject: Documentation/filesystems/proc.txt: describe /proc/<pid>/map_files has been removed from the -mm tree. Its filename was docs-procs-describe-proc-pid-map_files-entry.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Cyrill Gorcunov <gorcunov@xxxxxxxxxx> Subject: Documentation/filesystems/proc.txt: describe /proc/<pid>/map_files [akpm@xxxxxxxxxxxxxxxxxxxx: tweaks] Signed-off-by: Cyrill Gorcunov <gorcunov@xxxxxxxxxx> Cc: Kees Cook <keescook@xxxxxxxxxxxx> Cc: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx> Cc: Calvin Owens <calvinowens@xxxxxx> Cc: Pavel Emelyanov <xemul@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- Documentation/filesystems/proc.txt | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff -puN Documentation/filesystems/proc.txt~docs-procs-describe-proc-pid-map_files-entry Documentation/filesystems/proc.txt --- a/Documentation/filesystems/proc.txt~docs-procs-describe-proc-pid-map_files-entry +++ a/Documentation/filesystems/proc.txt @@ -42,6 +42,7 @@ Table of Contents 3.6 /proc/<pid>/comm & /proc/<pid>/task/<tid>/comm 3.7 /proc/<pid>/task/<tid>/children - Information about task children 3.8 /proc/<pid>/fdinfo/<fd> - Information about opened file + 3.9 /proc/<pid>/map_files - Information about memory mapped files 4 Configuring procfs 4.1 Mount options @@ -1763,6 +1764,28 @@ pair provide additional information part with TIMER_ABSTIME option which will be shown in 'settime flags', but 'it_value' still exhibits timer's remaining time. +3.9 /proc/<pid>/map_files - Information about memory mapped files +--------------------------------------------------------------------- +This directory contains symbolic links which represent memory mapped files +the process is maintaining. Example output: + + | lr-------- 1 root root 64 Jan 27 11:24 333c600000-333c620000 -> /usr/lib64/ld-2.18.so + | lr-------- 1 root root 64 Jan 27 11:24 333c81f000-333c820000 -> /usr/lib64/ld-2.18.so + | lr-------- 1 root root 64 Jan 27 11:24 333c820000-333c821000 -> /usr/lib64/ld-2.18.so + | ... + | lr-------- 1 root root 64 Jan 27 11:24 35d0421000-35d0422000 -> /usr/lib64/libselinux.so.1 + | lr-------- 1 root root 64 Jan 27 11:24 400000-41a000 -> /usr/bin/ls + +The name of a link represents the virtual memory bounds of a mapping, i.e. +vm_area_struct::vm_start-vm_area_struct::vm_end. + +The main purpose of the map_files is to retrieve a set of memory mapped +files in a fast way instead of parsing /proc/<pid>/maps or +/proc/<pid>/smaps, both of which contain many more records. At the same +time one can open(2) mappings from the listings of two processes and +comparing their inode numbers to figure out which anonymous memory areas +are actually shared. + ------------------------------------------------------------------------------ Configuring procfs ------------------------------------------------------------------------------ _ Patches currently in -mm which might be from gorcunov@xxxxxxxxxx are origin.patch mm-pagemap-limit-scan-to-virtual-region-being-asked.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html