The truth is that sometimes it takes more than a few reboot for the bug to occur. 3.15.0-0.rc4.git0.1.fc21.i686+debug FAILED http://koji.fedoraproject.org/koji/buildinfo?buildID=515111 ... ACPI: PCI Interrupt Link [AAZA] enabled at IRQ 22 snd_hda_intel 0000:00:07.0: Disabling MSI snd_hda_intel 0000:00:07.0: position_fix set to 1 for device 1458:a022 ... ------------[ cut here ]------------ WARNING: CPU: 1 PID: 496 at lib/dma-debug.c:593 debug_dma_assert_idle+0x159/0x1d0() snd_hda_intel 0000:00:07.0: DMA-API: cpu touching an active dma mapped cacheline [cln=0x03012000] Modules linked in: ip6t_rpfilter ip6t_REJECT xt_conntrack cfg80211 rfkill ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_controller kvm_amd snd_hda_codec kvm snd_hwdep nouveau snd_seq mxm_wmi video snd_seq_device snd_pcm i2c_algo_bit ttm drm_kms_helper ppdev microcode parport_serial parport_pc snd_timer k10temp drm serio_raw i2c_nforce2 parport snd i2c_core soundcore wmi acpi_cpufreq sunrpc ata_generic pata_acpi r8169 mii skge pata_amd uas usb_storage ------------[ cut here ]------------ CPU: 1 PID: 496 Comm: firewalld Not tainted 3.15.0-0.rc4.git0.1.fc21.i686+debug #1 Hardware name: Gigabyte Technology Co., Ltd. M720-US3/M720-US3, BIOS F7n 09/07/2010 WARNING: CPU: 2 PID: 852 at lib/dma-debug.c:593 debug_dma_assert_idle+0x159/0x1d0() 00000000 252e7679 00000000 snd_hda_intel 0000:00:07.0: DMA-API: cpu touching an active dma mapped cacheline [cln=0x03012000] eed99df0 c0ae6f0d eed99e34 Modules linked in: eed99e24 c0454432 ip6t_rpfilter ip6t_REJECT c0ceddd8 xt_conntrack cfg80211 rfkill eed99e54 ebtable_nat ebtable_broute bridge 000001f0 stp llc c0cebc97 ebtable_filter 00000251 ebtables ip6table_nat nf_conntrack_ipv6 c0754c39 nf_defrag_ipv6 00000251 nf_nat_ipv6 ip6table_mangle ip6table_security c0754c39 ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 f3721700 nf_defrag_ipv4 nf_nat_ipv4 f2cfc480 nf_nat 03012000 eed99e40 c045448e 00000009 eed99e34 c0ceddd8 Call Trace: [<c0ae6f0d>] dump_stack+0x48/0x60 nf_conntrack iptable_mangle iptable_security iptable_raw [<c0454432>] warn_slowpath_common+0x82/0xa0 snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_controller [<c0754c39>] ? debug_dma_assert_idle+0x159/0x1d0 kvm_amd [<c0754c39>] ? debug_dma_assert_idle+0x159/0x1d0 snd_hda_codec kvm snd_hwdep nouveau snd_seq [<c045448e>] warn_slowpath_fmt+0x3e/0x60 [<c0754c39>] debug_dma_assert_idle+0x159/0x1d0 mxm_wmi video [<c0589d69>] ? anon_vma_prepare+0x29/0x140 [<c057e18e>] do_wp_page+0xce/0x890 snd_seq_device snd_pcm [<c0480065>] ? __hrtimer_start_range_ns+0x35/0x550 i2c_algo_bit [<c0580792>] handle_mm_fault+0x662/0xb70 ttm drm_kms_helper [<c0480065>] ? __hrtimer_start_range_ns+0x35/0x550 ppdev microcode parport_serial parport_pc snd_timer [<c0af31f7>] __do_page_fault+0x1a7/0x5d0 k10temp drm serio_raw i2c_nforce2 [<c05031fc>] ? __audit_syscall_entry+0x8c/0xe0 parport snd [<c04b17ab>] ? trace_hardirqs_on+0xb/0x10 i2c_core soundcore [<c04b16fc>] ? trace_hardirqs_on_caller+0x13c/0x1e0 wmi acpi_cpufreq [<c0af3620>] ? __do_page_fault+0x5d0/0x5d0 [<c0af363a>] do_page_fault+0x1a/0x20 sunrpc ata_generic pata_acpi [<c0af0014>] error_code+0x6c/0x74 r8169 mii ---[ end trace 08b99da35a4e0d8c ]--- Mapped at: [<c0752ce2>] debug_dma_alloc_coherent+0x22/0x70 [<f80f8e90>] snd_dma_alloc_pages+0x170/0x260 [snd_pcm] [<f80f8fe2>] snd_dma_alloc_pages_fallback+0x62/0x90 [snd_pcm] skge [<f80f93b0>] snd_malloc_sgbuf_pages+0xf0/0x211 [snd_pcm] [<f80f8f23>] snd_dma_alloc_pages+0x203/0x260 [snd_pcm] pata_amd uas usb_storage CPU: 2 PID: 852 Comm: firewalld Tainted: G W 3.15.0-0.rc4.git0.1.fc21.i686+debug #1 Hardware name: Gigabyte Technology Co., Ltd. M720-US3/M720-US3, BIOS F7n 09/07/2010 00000000 cef7cf31 00000000 ecf2ddf0 c0ae6f0d ecf2de34 ecf2de24 c0454432 c0ceddd8 ecf2de54 00000354 c0cebc97 00000251 c0754c39 00000251 c0754c39 f3721700 f2cfc480 03012000 ecf2de40 c045448e 00000009 ecf2de34 c0ceddd8 Call Trace: [<c0ae6f0d>] dump_stack+0x48/0x60 [<c0454432>] warn_slowpath_common+0x82/0xa0 [<c0754c39>] ? debug_dma_assert_idle+0x159/0x1d0 [<c0754c39>] ? debug_dma_assert_idle+0x159/0x1d0 [<c045448e>] warn_slowpath_fmt+0x3e/0x60 [<c0754c39>] debug_dma_assert_idle+0x159/0x1d0 [<c0589d69>] ? anon_vma_prepare+0x29/0x140 [<c057e18e>] do_wp_page+0xce/0x890 [<c0480065>] ? __hrtimer_start_range_ns+0x35/0x550 [<c0580792>] handle_mm_fault+0x662/0xb70 [<c0480065>] ? __hrtimer_start_range_ns+0x35/0x550 [<c0af31f7>] __do_page_fault+0x1a7/0x5d0 [<c04b16fc>] ? trace_hardirqs_on_caller+0x13c/0x1e0 [<c05031fc>] ? __audit_syscall_entry+0x8c/0xe0 [<c04b17ab>] ? trace_hardirqs_on+0xb/0x10 [<c04b16fc>] ? trace_hardirqs_on_caller+0x13c/0x1e0 [<c0af3620>] ? __do_page_fault+0x5d0/0x5d0 [<c0af363a>] do_page_fault+0x1a/0x20 [<c0af0014>] error_code+0x6c/0x74 ---[ end trace 08b99da35a4e0d8d ]--- Mapped at: [<c0752ce2>] debug_dma_alloc_coherent+0x22/0x70 [<f80f8e90>] snd_dma_alloc_pages+0x170/0x260 [snd_pcm] [<f80f8fe2>] snd_dma_alloc_pages_fallback+0x62/0x90 [snd_pcm] [<f80f93b0>] snd_malloc_sgbuf_pages+0xf0/0x211 [snd_pcm] [<f80f8f23>] snd_dma_alloc_pages+0x203/0x260 [snd_pcm] ... However with the 'cachelines-revert.patch', related to https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/lib/dma-debug.c?id=3b7a641, after rebooting 12 times sequentially, everything is OK! i.e. kernel-3.15.0-0.rc4.git0.3.fc21.i686 PASSED poma _______________________________________________ kernel mailing list kernel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/kernel
