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| author |   Andrii Nakryiko <andrii@kernel.org> | 2024-06-27 10:08:56 -0700 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2024-07-12 15:52:12 -0700 |
| commit | c10cb9148e5175e65326f81930ecebd0147e2721 (patch) | |
| tree | e40862fc2ed88f3167f4e7466b12441711a0ba95 | |
| parent | fs/procfs: add build ID fetching to PROCMAP_QUERY API (diff) | |
| download | wireguard-linux-c10cb9148e5175e65326f81930ecebd0147e2721.tar.xz wireguard-linux-c10cb9148e5175e65326f81930ecebd0147e2721.zip | |
docs/procfs: call out ioctl()-based PROCMAP_QUERY command existence
Call out PROCMAP_QUERY ioctl() existence in the section describing
/proc/PID/maps file in documentation. We refer user to UAPI header for
low-level details of this programmatic interface.
Link: https://lkml.kernel.org/r/20240627170900.1672542-5-andrii@kernel.org
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | Documentation/filesystems/proc.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst index 82d142de3461..e834779d9611 100644 --- a/Documentation/filesystems/proc.rst +++ b/Documentation/filesystems/proc.rst @@ -443,6 +443,15 @@ is not associated with a file: or if empty, the mapping is anonymous. +Starting with 6.11 kernel, /proc/PID/maps provides an alternative +ioctl()-based API that gives ability to flexibly and efficiently query and +filter individual VMAs. This interface is binary and is meant for more +efficient and easy programmatic use. `struct procmap_query`, defined in +linux/fs.h UAPI header, serves as an input/output argument to the +`PROCMAP_QUERY` ioctl() command. See comments in linus/fs.h UAPI header for +details on query semantics, supported flags, data returned, and general API +usage information. + The /proc/PID/smaps is an extension based on maps, showing the memory consumption for each of the process's mappings. For each mapping (aka Virtual Memory Area, or VMA) there is a series of lines such as the following:: |