lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 19 Nov 2015 10:21:46 +0800 From: "Wangnan (F)" <wangnan0@...wei.com> To: Arnaldo Carvalho de Melo <acme@...nel.org> CC: Jiri Olsa <jolsa@...nel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: perf BPF/elfdep intermitent build problems On 2015/11/19 9:24, Wangnan (F) wrote: > > > On 2015/11/19 6:44, Arnaldo Carvalho de Melo wrote: >> Have you guys ever saw this? >> >> [acme@zoo linux]$ alias m >> alias m='perf stat -e cycles make O=/tmp/build/perf -C tools/perf >> install-bin' >> [acme @zoo linux]$ m >> make: Entering directory '/home/git/linux/tools/perf' >> BUILD: Doing 'make -j4' parallel build >> make[2]: Nothing to be done for 'fixdep'. >> CC /tmp/build/perf/util/machine.o >> LD /tmp/build/perf/util/libperf-in.o >> No libelf found >> BPF API too old > > This error message means the kernel header in rootfs is too old, > causes tools/build/feature/test-bpf.c failed to be built. Strange... even in feature detection it should check BPF API through kernel source where you are using to build perf... I guess you are not using NFS or share it with other people? > >> Makefile:191: recipe for target 'elfdep' failed >> make[2]: *** [elfdep] Error 255 >> make[2]: *** Waiting for unfinished jobs.... >> Makefile:194: recipe for target 'bpfdep' failed >> make[2]: *** [bpfdep] Error 255 >> Makefile.perf:434: recipe for target '/tmp/build/perf/libbpf.a' failed >> make[1]: *** [/tmp/build/perf/libbpf.a] Error 2 >> make[1]: *** Waiting for unfinished jobs.... >> LD /tmp/build/perf/libperf-in.o >> Makefile:87: recipe for target 'install-bin' failed >> make: *** [install-bin] Error 2 >> make: Leaving directory '/home/git/linux/tools/perf' >> >> Performance counter stats for 'make O=/tmp/build/perf -C tools/perf >> install-bin': >> >> 10,265,920,369 cycles >> >> 3.002799545 seconds time elapsed >> >> [acme@zoo linux]$ >> >> >> If I go and try doing a clean on the libbpf dir I see another problem: >> >> [acme@zoo linux]$ cd tools/lib/bpf >> [acme@zoo bpf]$ make clean >> >> Auto-detecting system features: >> ... libelf: [ OFF ] >> ... bpf: [ OFF ] >> >> CLEAN libbpf >> CLEAN core-gen >> [acme@zoo bpf]$ >> >> No need for feature detection when doing a plain 'make clean', right? >> Right. It should be $ cd tools/lib/bpf $ make clean CLEAN libbpf CLEAN core-gen $ After cleaning can you trigger this problem again? >> But then, after cleaning it again, and entering tools/perf to do a 'make >> clean' as well, it does the feature detection at a second 'make clean' >> and this time it shoes [ on ] for both libelf and bpf, and this time >> I manage to build perf. >> >> This is all intermitent, will eventually try to drill down if you don't >> fix it first > > First let me try to trigger it in my environment... > > Thank you. > >> - Arnaldo > > > -- > To unsubscribe from this list: send the line "unsubscribe > linux-kernel" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists