The requirement of this function is first proposed at 2015. Please refer to
http://lkml.iu.edu/hypermail/linux/kernel/1506.2/02372.html http://lkml.iu.edu/hypermail/linux/kernel/1506.3/02290.html http://lkml.iu.edu/hypermail/linux/kernel/1506.3/03512.html For systems which use hugetlbfs, if a sample is captured inside hugetlbfs, perf should not resolve symbols from the file shown in /prof/<pid>/mmap, because 'files' in hugetlbfs are constructed during execution and not ELF files. If user knows positions of symbols, he/she should provide /tmp/perf-<pid>.map file. This 3 patches makes perf recognize hugetlbfs mapping as anon mapping. Before this 3 patches user has no chance to use his/her own .map file to resolve symbols because perf tries to use hugetlbfs file. Wang Nan (3): perf tools: Recognize hugetlb mapping as anon mapping tools lib api fs: Add hugetlbfs filesystem detector perf record: Mark MAP_HUGETLB during synthesizing mmap events tools/lib/api/fs/fs.c | 15 +++++++++++++++ tools/lib/api/fs/fs.h | 1 + tools/perf/util/event.c | 7 +++++++ tools/perf/util/map.c | 8 +++++--- 4 files changed, 28 insertions(+), 3 deletions(-) Signed-off-by: Wang Nan <wangn...@huawei.com> Cc: Hou Pengyang <houpengy...@huawei.com> Cc: He Kuang <heku...@huawei.com> Cc: Arnaldo Carvalho de Melo <a...@redhat.com> -- 1.8.3.4
