sha1origin/pr/2468/mergeghprbActualCommit0681c90a91537e572c489c014ad00c3020b156d8ghprbActualCommitAuthorghprbActualCommitAuthorEmailghprbAuthorRepoGitUrlhttps://github.com/olsajiri/bcc.gitghprbTriggerAuthorghprbTriggerAuthorEmailghprbTriggerAuthorLoginyonghong-songghprbTriggerAuthorLoginMention@yonghong-songghprbPullId2468ghprbTargetBranchmasterghprbSourceBranchksym_moduleGIT_BRANCHksym_moduleghprbPullAuthorEmailghprbPullAuthorLoginolsajirighprbPullAuthorLoginMention@olsajirighprbPullDescriptionGitHub pull request #2468 of commit 0681c90a91537e572c489c014ad00c3020b156d8, no merge conflicts.ghprbPullTitleReport proper module on kernel backtraceghprbPullLinkhttps://github.com/iovisor/bcc/pull/2468ghprbPullLongDescriptionRaghavendra Rao reported that memleak does not display\r\nproper name of the related kernel module, but just the\r\n\"kernel\" string, like here for xfs module functions:\r\n\r\n 131072 bytes in 4 allocations from stack\r\n ..\r\n bvec_alloc+0x92 [kernel]\r\n bio_alloc_bioset+0x13f [kernel]\r\n xfs_add_to_ioend+0x2df [kernel]\r\n xfs_do_writepage+0x148 [kernel]\r\n write_cache_pages+0x171 [kernel]\r\n xfs_vm_writepages+0x59 [kernel]\r\n do_writepages+0x43 [kernel]\r\n ...\r\n\r\nThe kernel resolver code is parsing /proc/kallsyms, which\r\nalready has the module information in.\r\n\r\nThis patch is adding support to parse the module info\r\nfrom /proc/kallsyms and initialize the module with\r\nproper value.\r\n\r\nAbove memleak backtrace now looks like:\r\n\r\n 131072 bytes in 4 allocations from stack\r\n\r\n bvec_alloc+0x92 [kernel]\r\n bio_alloc_bioset+0x13f [kernel]\r\n xfs_add_to_ioend+0x2df [xfs]\r\n xfs_do_writepage+0x148 [xfs]\r\n write_cache_pages+0x171 [kernel]\r\n xfs_vm_writepages+0x59 [xfs]\r\n do_writepages+0x43 [kernel]\r\n ...\r\n\r\nReported-by: Raghavendra Rao <ragrao@redhat.com>\r\nSigned-off-by: Jiri Olsa <jolsa@kernel.org>ghprbCommentBody[buildbot, ok to test]ghprbGhRepositoryiovisor/bccghprbCredentialsId6d3daf13-69b8-48b1-9c8f-ec5353264113Started by upstream project "bcc-pr" build number 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» ubuntu1804 #2727false27245FAILURE1563838176765https://buildbot.iovisor.org/jenkins/user/casparant/my-views/view/all/job/bcc-pr/label=ubuntu1804/27/ubuntu1804-slave-295git