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Date: Sun, 24 May 2015 13:59:46 -0700 From: Fernando Lopez-Lezcano <nando@...ma.Stanford.EDU> To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>, linux-rt-users <linux-rt-users@...r.kernel.org> CC: nando@...ma.Stanford.EDU, LKML <linux-kernel@...r.kernel.org>, Thomas Gleixner <tglx@...utronix.de>, rostedt@...dmis.org, John Kacur <jkacur@...hat.com> Subject: Re: [ANNOUNCE] 4.0.4-rt1 On 05/19/2015 02:39 PM, Sebastian Andrzej Siewior wrote: > Dear RT folks! > > I'm pleased to announce the v4.0.4-rt1 patch set. Great!! > Changes since v3.18.13-rt10 > > - Rebase to v4.0. > > - David Hildenbrand's series of decouple of preempt_disable from > pagefault_disable is part of the series. > > While doing the v4.0 I stumbled upon a few things. Therefore I plan to > reorder the -RT queue and merge patches where possible. Also I intend to > drop PREEMPT_RTB and PREEMPT_RT_BASE unless there is need for it… ... I had to do this to get it to build (looks like it is not rt specific, probably just a typo in mainline): -------- --- linux-4.0/sound/soc/intel/sst/sst.c~ 2015-04-12 15:12:50.000000000 -0700 +++ linux-4.0/sound/soc/intel/sst/sst.c 2015-05-23 21:51:46.000000000 -0700 @@ -368,8 +368,8 @@ * initialize by FW or driver when firmware is loaded */ spin_lock_irqsave(&ctx->ipc_spin_lock, irq_flags); - sst_shim_write64(shim, SST_IMRX, shim_regs->imrx), - sst_shim_write64(shim, SST_CSR, shim_regs->csr), + sst_shim_write64(shim, SST_IMRX, shim_regs->imrx); + sst_shim_write64(shim, SST_CSR, shim_regs->csr); spin_unlock_irqrestore(&ctx->ipc_spin_lock, irq_flags); } -------- On a desktop with an i7-3770k it seems to run fine (but I have not have time to test for latency problems). On my laptop, a lenovo w540, I get this continuously - so it is not really usable at this point: -------- May 24 13:51:41 localhost kernel: ------------[ cut here ]------------ May 24 13:51:41 localhost kernel: WARNING: CPU: 5 PID: 361 at drivers/gpu/drm/i915/intel_display.c:9748 intel_check_page_flip+0xaa/0xf0 [i915]() May 24 13:51:41 localhost kernel: WARN_ON(!in_interrupt()) May 24 13:51:41 localhost kernel: Modules linked in: May 24 13:51:41 localhost kernel: rfcomm fuse ccm xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter ip6t_REJ\ ECT nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mang\ le 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 bnep bbswitch(OE) vfat fat iTCO_wdt iTCO_vendor_support arc4 intel_rapl iosf_mbi coretemp kvm_intel kvm uvcvideo crct10dif_pclmul videobuf2_vmalloc videobuf\ 2_core crc32_pclmul crc32c_intel videobuf2_memops ghash_clmulni_intel v4l2_common videodev media iwlmvm btusb serio_raw mac80211 bluetooth snd_hda_codec_realtek May 24 13:51:41 localhost kernel: snd_hda_codec_hdmi snd_hda_codec_generic iwlwifi snd_hda_intel sdhci_pci snd_hda_controller cfg80211 sdhci snd_hda_codec mmc_core snd_h\ wdep lpc_ich snd_seq mei_me i2c_i801 mfd_core snd_seq_device mei snd_pcm thinkpad_acpi snd_timer ie31200_edac snd shpchp edac_core soundcore tpm_tis rfkill tpm nfsd auth\ _rpcgss nfs_acl lockd grace sunrpc i915 i2c_algo_bit e1000e drm_kms_helper ptp drm pps_core wmi video May 24 13:51:41 localhost kernel: CPU: 5 PID: 361 Comm: irq/30-i915 Tainted: G W OE 4.0.4-201.rt1.2.fc21.ccrma.x86_64+rt #1 May 24 13:51:41 localhost kernel: Hardware name: LENOVO 20BGCTO1WW/20BGCTO1WW, BIOS GNET65WW (2.13 ) 06/20/2014 May 24 13:51:41 localhost kernel: 0000000000000000 000000001f35af7b ffff8804651afc78 ffffffff8179c0b9 May 24 13:51:41 localhost kernel: 0000000000000000 ffff8804651afcd0 ffff8804651afcb8 ffffffff8109ee1a May 24 13:51:41 localhost kernel: ffff8804651afcb8 ffff88046638c000 ffff880469dd7800 0000000000000001 May 24 13:51:41 localhost kernel: Call Trace: May 24 13:51:41 localhost kernel: [<ffffffff8179c0b9>] dump_stack+0x4c/0x81 May 24 13:51:41 localhost kernel: [<ffffffff8109ee1a>] warn_slowpath_common+0x8a/0xe0 May 24 13:51:41 localhost kernel: [<ffffffff8109eec5>] warn_slowpath_fmt+0x55/0x70 May 24 13:51:41 localhost kernel: [<ffffffffa0186dda>] intel_check_page_flip+0xaa/0xf0 [i915] May 24 13:51:41 localhost kernel: [<ffffffffa0152018>] ironlake_irq_handler+0x2e8/0x1000 [i915] May 24 13:51:41 localhost kernel: [<ffffffff81014610>] ? __switch_to+0x150/0x610 May 24 13:51:41 localhost kernel: [<ffffffff810fb040>] ? irq_thread_fn+0x50/0x50 May 24 13:51:41 localhost kernel: [<ffffffff810fb067>] irq_forced_thread_fn+0x27/0x80 May 24 13:51:41 localhost kernel: [<ffffffff810fb61f>] irq_thread+0x12f/0x180 May 24 13:51:41 localhost kernel: [<ffffffff810fb0f0>] ? wake_threads_waitq+0x30/0x30 May 24 13:51:41 localhost kernel: [<ffffffff810fb4f0>] ? irq_thread_check_affinity+0x90/0x90 May 24 13:51:41 localhost kernel: [<ffffffff810bf4ba>] kthread+0xca/0xe0 May 24 13:51:41 localhost kernel: [<ffffffff810bf3f0>] ? kthread_worker_fn+0x180/0x180 May 24 13:51:41 localhost kernel: [<ffffffff817a2098>] ret_from_fork+0x58/0x90 May 24 13:51:41 localhost kernel: [<ffffffff810bf3f0>] ? kthread_worker_fn+0x180/0x180 May 24 13:51:41 localhost kernel: ---[ end trace 00000000000005fe ]--- May 24 13:51:41 localhost kernel: ------------[ cut here ]------------ -------- Any patches I could try to fix this? -- Fernando -- 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/
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