linux.git/Documentation/vm/page-types.c, branch v3.2

Documentation/vm/page-types.c: auto debugfs mount for hwpoison operation

2011-03-23T00:44:17+00:00

page-types.c doesn't supply a way to specify the debugfs path and the
original debugfs path is not usual on most machines.  This patch supplies
a way to auto mount debugfs if needed.

This patch is heavily inspired by tools/perf/utils/debugfs.c

[akpm@linux-foundation.org: make functions static]
[akpm@linux-foundation.org: fix debugfs_mount() signature]
Signed-off-by: Chen Gong 
Reviewed-by: KOSAKI Motohiro 
Reviewed-by: Wu Fengguang 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

page-types.c: fix name of unpoison interface

2010-10-07T07:41:24+00:00

The page-types utility still uses an out of date name for the
unpoison interface: debugfs:hwpoison/renew-pfn
This patch renames and fixes it.

Signed-off-by: Naoya Horiguchi 
Acked-by: Wu Fengguang 
Signed-off-by: Andi Kleen

Documentation/vm: fix spelling in page-types.c

2010-08-05T20:21:23+00:00

Trivial typo fixes.

Signed-off-by: Tommi Rantala 
Signed-off-by: Randy Dunlap 
Signed-off-by: Linus Torvalds

page-types: add standard GPL license header

2009-12-16T11:19:57+00:00

Signed-off-by: Wu Fengguang 
Signed-off-by: Andi Kleen

page-types: exit early when invoked with -d|--describe

2009-12-15T16:53:11+00:00

On a system with large amount of memory (256GB), invoking page-types can
take quite a long time, which is unreasonable considering the user only
wants a description of the flags:

	# time ./page-types -d 0x10
	0x0000000000000010	____D_____________________________	dirty

	real	0m34.285s
	user	0m1.966s
	sys	0m32.313s

This is because we still walk the entire address range.

Exiting early seems like a reasonble solution:

# time ./page-types -d 0x10
	0x0000000000000010	____D_____________________________	dirty

	real	0m0.007s
	user	0m0.001s
	sys	0m0.005s

Signed-off-by: Alex Chiang 
Cc: Andi Kleen 
Cc: Haicheng Li 
Acked-by: Wu Fengguang 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

page-types: whitespace alignment

2009-12-15T16:53:11+00:00

Align the output when page-type -h is invoked.

Signed-off-by: Alex Chiang 
Acked-by: Wu Fengguang 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

page-types: learn to describe flags directly from command line

2009-12-15T16:53:11+00:00

Teach page-types to describe page flags directly from the command line.

Why is this useful?  For instance, if you're using memory hotplug and see
this in /var/log/messages:

	kernel: removing from LRU failed 3836dd0/1/1e00000000000010

It would be nice to decode those page flags without staring at the source.

Example usage and output:

# Documentation/vm/page-types -d 0x10
0x0000000000000010	____D_____________________________	dirty

# Documentation/vm/page-types -d anon
0x0000000000001000	____________a_____________________	anonymous

# Documentation/vm/page-types -d anon,0x10
0x0000000000001010	____D_______a_____________________	dirty,anonymous

[achiang@hp.com: documentation]
Signed-off-by: Alex Chiang 
Signed-off-by: Wu Fengguang 
Cc: Andi Kleen 
Cc: Haicheng Li 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

page-types: unsigned cannot be less than 0 in add_page()

2009-12-15T16:53:11+00:00

If not signed, testing of the read() return value in this function
will not work.

Signed-off-by: Roel Kluin 
Cc: Wu Fengguang 
Cc: Randy Dunlap 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

page-types: constify read only arrays

2009-12-15T16:53:10+00:00

Signed-off-by: Tommi Rantala 
Cc: Randy Dunlap 
Cc: Wu Fengguang 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge branch 'for-next' into for-linus

2009-12-07T17:36:35+00:00

Conflicts:

	kernel/irq/chip.c