[Bug 785558] New: Warning at mm/memcontrol.c:4998 triggered (Creating flat hierarchy is considered deprecated)
https://bugzilla.novell.com/show_bug.cgi?id=785558 https://bugzilla.novell.com/show_bug.cgi?id=785558#c0 Summary: Warning at mm/memcontrol.c:4998 triggered (Creating flat hierarchy is considered deprecated) Classification: openSUSE Product: openSUSE 12.2 Version: Final Platform: x86-64 OS/Version: openSUSE 12.2 Status: NEW Severity: Normal Priority: P5 - None Component: Kernel AssignedTo: kernel-maintainers@forge.provo.novell.com ReportedBy: herbert@women-at-work.org QAContact: qa-bugs@suse.de Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20100101 Firefox/16.0 After installation of the latest kernel update (kernel-desktop-3.4.11-2.16.1.x86_64) the following warning is reported by the kernel with every boot: [ 98.210416] WARNING: at /home/abuild/rpmbuild/BUILD/kernel-desktop-3.4.11/linux-3.4/mm/memcontrol.c:4998 mem_cgroup_create+0x3ac/0x510() [ 98.210418] Hardware name: P5K [ 98.210419] Creating hierarchies with use_hierarchy==0 (flat hierarchy) is considered deprecated. If you believe that your setup is correct, we kindly ask you to contact linux-mm@kvack.org and let us know [ 98.210421] Modules linked in: ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables bridge stp cpufreq_conservative cpufreq_userspace cpufreq_powersave raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx raid1 snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm stv0299 snd_seq snd_timer snd_seq_device ves1x93 nouveau ttm drm_kms_helper drm i2c_algo_bit acpi_cpufreq snd dvb_ttpci mperf mxm_wmi video wmi pcspkr soundcore dvb_core saa7146_vv videodev sr_mod sg snd_page_alloc saa7146 coretemp videobuf_dma_sg videobuf_core atl1 iTCO_wdt firewire_ohci firewire_core crc_itu_t cdrom ttpci_eeprom i2c_i801 iTCO_vendor_support kvm_intel button kvm asus_atk0110 microcode autofs4 btrfs zlib_deflate crc32c libcrc32c processor thermal_sys scsi_dh_rdac scsi_dh_hp_sw scsi_dh_emc scsi_dh_alua scsi_dh ata_generic ata_piix pata_jmicron [ 98.210466] Pid: 3146, comm: libvirtd Not tainted 3.4.11-2.16-desktop #1 [ 98.210468] Call Trace: [ 98.210477] [<ffffffff81004648>] dump_trace+0x88/0x300 [ 98.210481] [<ffffffff81581675>] dump_stack+0x69/0x6f [ 98.210486] [<ffffffff8103fdc9>] warn_slowpath_common+0x79/0xc0 [ 98.210489] [<ffffffff8103fec5>] warn_slowpath_fmt+0x45/0x50 [ 98.210492] [<ffffffff8156a54c>] mem_cgroup_create+0x3ac/0x510 [ 98.210498] [<ffffffff810abaa3>] cgroup_mkdir+0x103/0x3d0 [ 98.210502] [<ffffffff81168f55>] vfs_mkdir+0xb5/0x170 [ 98.210506] [<ffffffff8116d424>] sys_mkdirat+0xe4/0xf0 [ 98.210510] [<ffffffff8159437d>] system_call_fastpath+0x1a/0x1f [ 98.210515] [<00007fac2267bf67>] 0x7fac2267bf66 [ 98.210517] ---[ end trace d718e9270289afc1 ]--- Reproducible: Always Steps to Reproduce: 1. Boot Linux kernel 3.4.11-2.16.1.x86_64 Actual Results: Kernel warning. Expected Results: No kernel warning ;-) -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=785558 https://bugzilla.novell.com/show_bug.cgi?id=785558#c1 Michal Hocko <mhocko@suse.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED CC| |mhocko@suse.com Resolution| |DUPLICATE --- Comment #1 from Michal Hocko <mhocko@suse.com> 2012-10-19 14:47:04 CEST --- The kernel warning is intentional and it should tell us about a bad hierarchy usage for memory cgroups. Libvirt is a known case and it should be fixed. The warning is harmless and you can safely ignore it. *** This bug has been marked as a duplicate of bug 781134 *** http://bugzilla.novell.com/show_bug.cgi?id=781134 -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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