Merge tag 'mm-nonmm-stable-2025-01-24-23-16' of...

Linas Vepstas <linas@austin.ibm.com>

Linus Lüssing <linus.luessing@c0d3.blue> <linus.luessing@ascom.ch>

Linus Lüssing <linus.luessing@c0d3.blue> <linus.luessing@web.de>

Linus Lüssing <linus.luessing@c0d3.blue> <ll@simonwunderlich.de>

<linux-hardening@vger.kernel.org> <kernel-hardening@lists.openwall.com>

Li Yang <leoyang.li@nxp.com> <leoli@freescale.com>

Li Yang <leoyang.li@nxp.com> <leo@zh-kernel.org>

D: Freescale QE SoC support and Ethernet driver

S: B-1206 Jingmao Guojigongyu

S: 16 Baliqiao Nanjie, Beijing 101100

S: People's Repulic of China

S: People's Republic of China

N: Vlad Yasevich

E: vyasevich@gmail.com

	# ./getdelays -d -p 10

	(output similar to next case)

Get sum of delays, since system boot, for all pids with tgid 5::

Get sum and peak of delays, since system boot, for all pids with tgid 242::

	# ./getdelays -d -t 5

	bash-4.4# ./getdelays -d -t 242

	print delayacct stats ON

	TGID	5

	CPU             count     real total  virtual total    delay total  delay average

	                    8        7000000        6872122        3382277          0.423ms

	IO              count    delay total  delay average

                   0              0          0.000ms

	SWAP            count    delay total  delay average

                       0              0          0.000ms

	RECLAIM         count    delay total  delay average

                   0              0          0.000ms

	THRASHING       count    delay total  delay average

                       0              0          0.000ms

	COMPACT         count    delay total  delay average

                       0              0          0.000ms

	WPCOPY          count    delay total  delay average

                       0              0          0.000ms

	IRQ             count    delay total  delay average

                       0              0          0.000ms

	TGID    242

	CPU         count     real total  virtual total    delay total  delay average      delay max      delay min

	               39      156000000      156576579        2111069          0.054ms     0.212296ms     0.031307ms

	IO          count    delay total  delay average      delay max      delay min

	                0              0          0.000ms     0.000000ms     0.000000ms

	SWAP        count    delay total  delay average      delay max      delay min

	                0              0          0.000ms     0.000000ms     0.000000ms

	RECLAIM     count    delay total  delay average      delay max      delay min

	                0              0          0.000ms     0.000000ms     0.000000ms

	THRASHING   count    delay total  delay average      delay max      delay min

	                0              0          0.000ms     0.000000ms     0.000000ms

	COMPACT     count    delay total  delay average      delay max      delay min

	                0              0          0.000ms     0.000000ms     0.000000ms

	WPCOPY      count    delay total  delay average      delay max      delay min

	              156       11215873          0.072ms     0.207403ms     0.033913ms

	IRQ         count    delay total  delay average      delay max      delay min

	                0              0          0.000ms     0.000000ms     0.000000ms

Get IO accounting for pid 1, it works only with -p::

Min Heap API

============

:Author: Kuan-Wei Chiu <visitorckw@gmail.com>

Introduction

============

to turn a tagged entry back into an untagged pointer and xa_pointer_tag()

to retrieve the tag of an entry.  Tagged pointers use the same bits that

are used to distinguish value entries from normal pointers, so you must

decide whether they want to store value entries or tagged pointers in

any particular XArray.

decide whether you want to store value entries or tagged pointers in any

particular XArray.

The XArray does not support storing IS_ERR() pointers as some

conflict with value entries or internal entries.

occupy a range of indices.  Once stored to, looking up any index in

the range will return the same entry as looking up any other index in

the range.  Storing to any index will store to all of them.  Multi-index

entries can be explicitly split into smaller entries, or storing ``NULL``

into any entry will cause the XArray to forget about the range.

entries can be explicitly split into smaller entries. Unsetting (using

xa_erase() or xa_store() with ``NULL``) any entry will cause the XArray

to forget about the range.

Normal API

==========

allocated ones.  A freshly-initialised XArray contains a ``NULL``

pointer at every index.

You can then set entries using xa_store() and get entries

using xa_load().  xa_store will overwrite any entry with the

new entry and return the previous entry stored at that index.  You can

use xa_erase() instead of calling xa_store() with a

``NULL`` entry.  There is no difference between an entry that has never

been stored to, one that has been erased and one that has most recently

had ``NULL`` stored to it.

You can then set entries using xa_store() and get entries using

xa_load().  xa_store() will overwrite any entry with the new entry and

return the previous entry stored at that index.  You can unset entries

using xa_erase() or by setting the entry to ``NULL`` using xa_store().

There is no difference between an entry that has never been stored to

and one that has been erased with xa_erase(); an entry that has most

recently had ``NULL`` stored to it is also equivalent except if the

XArray was initialized with ``XA_FLAGS_ALLOC``.

You can conditionally replace an entry at an index by using

xa_cmpxchg().  Like cmpxchg(), it will only succeed if