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
50 stores information into the memory from struct page extension. This memory
57 more accurately. On 2GB memory x86-64 VM box, 13343 early allocated pages
59 page extension feature. Anyway, after that, no page is left in
60 un-tracking state.
65 1) Build user-space helper::
149    If you want to sort by the page nums of buf, use the ``-m`` parameter.
155 		-a		Sort by memory allocation time.
156 		-m		Sort by total memory.
157 		-p		Sort by pid.
158 		-P		Sort by tgid.
159 		-n		Sort by task command name.
160 		-r		Sort by memory release time.
161 		-s		Sort by stack trace.
162 		-t		Sort by times (default).
163 		--sort <order>	Specify sorting order.  Sorting syntax is [+|-]key[,[+|-]key[,...]].
166 				order. Mixed use of abbreviated and complete-form of keys is allowed.
169 				./page_owner_sort <input> <output> --sort=n,+pid,-tgid
170 				./page_owner_sort <input> <output> --sort=at
175 		--cull <rules>
177 				multi-letter key from the **STANDARD FORMAT SPECIFIERS** section.
179 		<rules> is a single argument in the form of a comma-separated list,
184 		complete-form of keys is allowed.
187 				./page_owner_sort <input> <output> --cull=stacktrace
188 				./page_owner_sort <input> <output> --cull=st,pid,name
189 				./page_owner_sort <input> <output> --cull=n,f
192 		-f		Filter out the information of blocks whose memory has been released.
195 		--pid <pidlist>		Select by pid. This selects the blocks whose process ID
197 		--tgid <tgidlist>	Select by tgid. This selects the blocks whose thread
199 		--name <cmdlist>	Select by task command name. This selects the blocks whose
202 		<pidlist>, <tgidlist>, <cmdlist> are single arguments in the form of a comma-separated list,
207 				./page_owner_sort <input> <output> --pid=1
208 				./page_owner_sort <input> <output> --tgid=1,2,3
209 				./page_owner_sort <input> <output> --name name1,name2
215   For --sort option:
221 	st		stacktrace	stack trace of the page allocation
227   For --cull option:
234 	st		stacktrace	stack trace of the page allocation