Yixuan Cao 57eb60c04d tools/vm/page_owner_sort: fix -f option ... The -f option is to filter out the information of blocks whose memory has not been released, I noticed some blocks should not be filtered out. Commit 9cc7e96aa8 ("mm/page_owner: record timestamp and pid") records the allocation timestamp (ts_nsec) of all pages. Commit 866b485262 ("mm/page_owner: record the timestamp of all pages during free") records the free timestamp (free_ts_nsec) of all pages. When the page is allocated for the first time, the initial value of free_ts_nsec is 0, and the corresponding time will be obtained when the page is released. But during reallocation the free_ts_nsec will not reset to 0 again. In particular, when page migration occurs, these two timestamps will be the same. Now page_owner_sort removes all text blocks whose free_ts_nsec is not 0 when using -f option. However, this way can only select pages allocated for the first time. If a freed page is reallocated, free_ts_nsec will be less than ts_nsec; if page migration occurs, the two timestamps will be equal. These cases should be considered as pages are not released. So I fix the function is_need() to keep text blocks that meet the above two conditions when using -f option. Link: https://lkml.kernel.org/r/20220812155515.30846-1-caoyixuan2019@email.szu.edu.cn Signed-off-by: Yixuan Cao <caoyixuan2019@email.szu.edu.cn> Cc: Chongxi Zhao <zhaochongxi2019@email.szu.edu.cn> Cc: Jiajian Ye <yejiajian2018@email.szu.edu.cn> Cc: Yuhong Feng <yuhongf@szu.edu.cn> Cc: Liam Mark <lmark@codeaurora.org> Cc: Georgi Djakov <georgi.djakov@linaro.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2022-09-11 20:25:51 -07:00
..
.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
Makefile	tools/vm: fix cross-compile build	2020-04-21 11:11:56 -07:00
page-types.c	mm/page-flags: reuse PG_mappedtodisk as PG_anon_exclusive for PageAnon() pages	2022-05-09 18:20:44 -07:00
page_owner_sort.c	tools/vm/page_owner_sort: fix -f option	2022-09-11 20:25:51 -07:00
slabinfo-gnuplot.sh	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282	2019-06-05 17:36:37 +02:00
slabinfo.c	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00