Documentation/mm/page_owner.rst

17 to enlarge the trace buffer for preventing overlapping until userspace
18 program launched. And, launched program continually dump out the trace
19 buffer for later analysis and it would change system behaviour with more
45 stores information into the memory from struct page extension. This memory
52 more accurately. On 2GB memory x86-64 VM box, 13343 early allocated pages
54 page extension feature. Anyway, after that, no page is left in
55 un-tracking state.
60 1) Build user-space helper::
101    If you want to sort by the page nums of buf, use the ``-m`` parameter.
107 		-a		Sort by memory allocation time.
108 		-m		Sort by total memory.
109 		-p		Sort by pid.
110 		-P		Sort by tgid.
111 		-n		Sort by task command name.
112 		-r		Sort by memory release time.
113 		-s		Sort by stack trace.
114 		-t		Sort by times (default).
115 		--sort <order>	Specify sorting order.  Sorting syntax is [+|-]key[,[+|-]key[,...]].
118 				order. Mixed use of abbreviated and complete-form of keys is allowed.
121 				./page_owner_sort <input> <output> --sort=n,+pid,-tgid
122 				./page_owner_sort <input> <output> --sort=at
127 		--cull <rules>
129 				multi-letter key from the **STANDARD FORMAT SPECIFIERS** section.
131 		<rules> is a single argument in the form of a comma-separated list,
136 		complete-form of keys is allowed.
139 				./page_owner_sort <input> <output> --cull=stacktrace
140 				./page_owner_sort <input> <output> --cull=st,pid,name
141 				./page_owner_sort <input> <output> --cull=n,f
144 		-f		Filter out the information of blocks whose memory has been released.
147 		--pid <pidlist>		Select by pid. This selects the blocks whose process ID
149 		--tgid <tgidlist>	Select by tgid. This selects the blocks whose thread
151 		--name <cmdlist>	Select by task command name. This selects the blocks whose
154 		<pidlist>, <tgidlist>, <cmdlist> are single arguments in the form of a comma-separated list,
159 				./page_owner_sort <input> <output> --pid=1
160 				./page_owner_sort <input> <output> --tgid=1,2,3
161 				./page_owner_sort <input> <output> --name name1,name2
167   For --sort option:
173 	st		stacktrace	stack trace of the page allocation
179   For --cull option:
186 	st		stacktrace	stack trace of the page allocation