Documentation/filesystems/proc.txt - Issue 801393003: task_mmu: Reduce excessive indentation in clear_refs_write

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Issue 801393003: task_mmu: Reduce excessive indentation in clear_refs_write Base URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git@master

Patch Set: Second patch Created 6 years ago

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1 ------------------------------------------------------------------------------	1 ------------------------------------------------------------------------------

2 T H E /proc F I L E S Y S T E M	2 T H E /proc F I L E S Y S T E M

3 ------------------------------------------------------------------------------	3 ------------------------------------------------------------------------------

4 /proc/sys Terrehon Bowden <terrehon@pacbell.net> October 7 1999	4 /proc/sys Terrehon Bowden <terrehon@pacbell.net> October 7 1999

5 Bodo Bauer <bb@ricochet.net>	5 Bodo Bauer <bb@ricochet.net>

6	6

7 2.4.x update Jorge Nerin <comandante@zaralinux.com> November 14 2000	7 2.4.x update Jorge Nerin <comandante@zaralinux.com> November 14 2000

8 move /proc/sys Shen Feng <shen@cn.fujitsu.com> April 1 2009	8 move /proc/sys Shen Feng <shen@cn.fujitsu.com> April 1 2009

9 ------------------------------------------------------------------------------	9 ------------------------------------------------------------------------------

10 Version 1.3 Kernel version 2.2.12	10 Version 1.3 Kernel version 2.2.12

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481	481

482 To clear the bits for the anonymous pages associated with the process	482 To clear the bits for the anonymous pages associated with the process

483 > echo 2 > /proc/PID/clear_refs	483 > echo 2 > /proc/PID/clear_refs

484	484

485 To clear the bits for the file mapped pages associated with the process	485 To clear the bits for the file mapped pages associated with the process

486 > echo 3 > /proc/PID/clear_refs	486 > echo 3 > /proc/PID/clear_refs

487	487

488 To clear the soft-dirty bit	488 To clear the soft-dirty bit

489 > echo 4 > /proc/PID/clear_refs	489 > echo 4 > /proc/PID/clear_refs

490	490

	491 To reset the peak resident set size ("high water mark")

	492 > echo 5 > /proc/PID/clear_refs

	493

491 Any other value written to /proc/PID/clear_refs will have no effect.	494 Any other value written to /proc/PID/clear_refs will have no effect.

492	495

493 The /proc/pid/pagemap gives the PFN, which can be used to find the pageflags	496 The /proc/pid/pagemap gives the PFN, which can be used to find the pageflags

494 using /proc/kpageflags and number of times a page is mapped using	497 using /proc/kpageflags and number of times a page is mapped using

495 /proc/kpagecount. For detailed explanation, see Documentation/vm/pagemap.txt.	498 /proc/kpagecount. For detailed explanation, see Documentation/vm/pagemap.txt.

496	499

497 1.2 Kernel data	500 1.2 Kernel data

498 ---------------	501 ---------------

499	502

500 Similar to the process entries, the kernel data files give information about	503 Similar to the process entries, the kernel data files give information about

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1791 pid value exists (it can be learned by other means, e.g. by "kill -0 $PID"),	1794 pid value exists (it can be learned by other means, e.g. by "kill -0 $PID"),

1792 but it hides process' uid and gid, which may be learned by stat()'ing	1795 but it hides process' uid and gid, which may be learned by stat()'ing

1793 /proc/<pid>/ otherwise. It greatly complicates an intruder's task of gathering	1796 /proc/<pid>/ otherwise. It greatly complicates an intruder's task of gathering

1794 information about running processes, whether some daemon runs with elevated	1797 information about running processes, whether some daemon runs with elevated

1795 privileges, whether other user runs some sensitive program, whether other users	1798 privileges, whether other user runs some sensitive program, whether other users

1796 run any program at all, etc.	1799 run any program at all, etc.

1797	1800

1798 gid= defines a group authorized to learn processes information otherwise	1801 gid= defines a group authorized to learn processes information otherwise

1799 prohibited by hidepid=. If you use some daemon like identd which needs to learn	1802 prohibited by hidepid=. If you use some daemon like identd which needs to learn

1800 information about processes information, just add identd to this group.	1803 information about processes information, just add identd to this group.

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