> -----Original Message----- > From: Mittal, Anuj [mailto:anuj.mit...@intel.com] > Sent: Friday, September 20, 2019 08:03 > To: Liu, Yongxin; meta-intel@yoctoproject.org > Cc: Hao, Kexin; Yang, Liezhi > Subject: Re: [meta-intel][PATCH][meta-dpdk] dpdk: igb_uio: change ISR to > be threaded when using with RT kernel > > On Thu, 2019-09-19 at 11:29 +0800, Yongxin Liu wrote: > > When igb_uio driver is used with RT kernel, the interrupt handler > > should not use IRQF_NO_THREAD as a flag, since uio_event_notify > > will call rt_spin_lock which might sleep. > > > > Flage "IRQF_NO_THREAD" was introduced in upstream DPDK by commit > > "f0d1896fa > > igb_uio: use non-threaded ISR", but this flag is incompatible with RT > > kernel. > > It is necessary to keep upstream code intact when using with non-RT > > kernel. > > > > Is this something that has been reported upstream?
No report from upstream. Thanks, Yongxin > > Thanks, > > Anuj > > > Signed-off-by: Yongxin Liu <yongxin....@windriver.com> > > --- > > ...nge-ISR-to-be-threaded-when-using-with-RT.patch | 84 > > +++++++++++++++++++++ > > ...nge-ISR-to-be-threaded-when-using-with-RT.patch | 85 > > ++++++++++++++++++++++ > > recipes-extended/dpdk/dpdk_17.11.6.bb | 4 + > > recipes-extended/dpdk/dpdk_18.11.2.bb | 4 + > > 4 files changed, 177 insertions(+) > > create mode 100644 recipes-extended/dpdk/dpdk/dpdk-17.11-igb_uio- > > change-ISR-to-be-threaded-when-using-with-RT.patch > > create mode 100644 recipes-extended/dpdk/dpdk/dpdk-18.11-igb_uio- > > change-ISR-to-be-threaded-when-using-with-RT.patch > > > > diff --git a/recipes-extended/dpdk/dpdk/dpdk-17.11-igb_uio-change- > > ISR-to-be-threaded-when-using-with-RT.patch b/recipes- > > extended/dpdk/dpdk/dpdk-17.11-igb_uio-change-ISR-to-be-threaded-when- > > using-with-RT.patch > > new file mode 100644 > > index 0000000..d880cd3 > > --- /dev/null > > +++ b/recipes-extended/dpdk/dpdk/dpdk-17.11-igb_uio-change-ISR-to-be- > > threaded-when-using-with-RT.patch > > @@ -0,0 +1,84 @@ > > +From f78be4561de9e22ebff252feb1bdb37875d63093 Mon Sep 17 00:00:00 > > 2001 > > +From: Yongxin Liu <yongxin....@windriver.com> > > +Date: Wed, 18 Sep 2019 15:23:32 +0800 > > +Subject: [PATCH] igb_uio: change ISR to be threaded when using with > > RT kernel > > + > > +Non-thread ISR shouldn't call rt_spin_lock which might sleep. > > + > > +Here is the calltrace. > > + > > +[ 2034.457805] Call Trace: > > +[ 2034.460818] <IRQ> > > +[ 2034.463397] dump_stack+0x70/0x9a > > +[ 2034.467281] ___might_sleep.cold+0xe1/0xf2 > > +[ 2034.471943] rt_spin_lock+0x55/0x70 > > +[ 2034.475994] ? __wake_up_common_lock+0x61/0xb0 > > +[ 2034.481004] __wake_up_common_lock+0x61/0xb0 > > +[ 2034.485842] __wake_up+0x13/0x20 > > +[ 2034.489635] uio_event_notify+0x2c/0x50 [uio] > > +[ 2034.494560] igbuio_pci_irqhandler+0x1f/0x40 [igb_uio] > > +[ 2034.500262] __handle_irq_event_percpu+0x5f/0x3f0 > > +[ 2034.505532] ? cpuidle_enter_state+0xd3/0x500 > > +[ 2034.510454] handle_irq_event_percpu+0x4b/0x90 > > +[ 2034.515462] handle_irq_event+0x3c/0x5b > > +[ 2034.519864] handle_edge_irq+0xbb/0x210 > > +[ 2034.524264] handle_irq+0x23/0x30 > > +[ 2034.528143] do_IRQ+0x7e/0x150 > > +[ 2034.531764] common_interrupt+0xf/0xf > > +[ 2034.535990] </IRQ> > > + > > +Upstream-Status: Inappropriate > > + > > +Signed-off-by: Yongxin Liu <yongxin....@windriver.com> > > +--- > > + lib/librte_eal/linuxapp/igb_uio/igb_uio.c | 6 +----- > > + 1 file changed, 1 insertion(+), 5 deletions(-) > > + > > +diff --git a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c > > b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c > > +index 3073bca31..3b1e1d553 100644 > > +--- a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c > > ++++ b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c > > +@@ -239,7 +239,6 @@ igbuio_pci_enable_interrupts(struct > > rte_uio_pci_dev *udev) > > + msix_entry.entry = 0; > > + if (pci_enable_msix(udev->pdev, &msix_entry, 1) == 0) { > > + dev_dbg(&udev->pdev->dev, "using MSI-X"); > > +- udev->info.irq_flags = IRQF_NO_THREAD; > > + udev->info.irq = msix_entry.vector; > > + udev->mode = RTE_INTR_MODE_MSIX; > > + break; > > +@@ -247,7 +246,6 @@ igbuio_pci_enable_interrupts(struct > > rte_uio_pci_dev *udev) > > + #else > > + if (pci_alloc_irq_vectors(udev->pdev, 1, 1, > > PCI_IRQ_MSIX) == 1) { > > + dev_dbg(&udev->pdev->dev, "using MSI-X"); > > +- udev->info.irq_flags = IRQF_NO_THREAD; > > + udev->info.irq = pci_irq_vector(udev->pdev, 0); > > + udev->mode = RTE_INTR_MODE_MSIX; > > + break; > > +@@ -259,7 +257,6 @@ igbuio_pci_enable_interrupts(struct > > rte_uio_pci_dev *udev) > > + #ifndef HAVE_ALLOC_IRQ_VECTORS > > + if (pci_enable_msi(udev->pdev) == 0) { > > + dev_dbg(&udev->pdev->dev, "using MSI"); > > +- udev->info.irq_flags = IRQF_NO_THREAD; > > + udev->info.irq = udev->pdev->irq; > > + udev->mode = RTE_INTR_MODE_MSI; > > + break; > > +@@ -267,7 +264,6 @@ igbuio_pci_enable_interrupts(struct > > rte_uio_pci_dev *udev) > > + #else > > + if (pci_alloc_irq_vectors(udev->pdev, 1, 1, > > PCI_IRQ_MSI) == 1) { > > + dev_dbg(&udev->pdev->dev, "using MSI"); > > +- udev->info.irq_flags = IRQF_NO_THREAD; > > + udev->info.irq = pci_irq_vector(udev->pdev, 0); > > + udev->mode = RTE_INTR_MODE_MSI; > > + break; > > +@@ -277,7 +273,7 @@ igbuio_pci_enable_interrupts(struct > > rte_uio_pci_dev *udev) > > + case RTE_INTR_MODE_LEGACY: > > + if (pci_intx_mask_supported(udev->pdev)) { > > + dev_dbg(&udev->pdev->dev, "using INTX"); > > +- udev->info.irq_flags = IRQF_SHARED | > > IRQF_NO_THREAD; > > ++ udev->info.irq_flags = IRQF_SHARED; > > + udev->info.irq = udev->pdev->irq; > > + udev->mode = RTE_INTR_MODE_LEGACY; > > + break; > > +-- > > +2.14.4 > > + > > diff --git a/recipes-extended/dpdk/dpdk/dpdk-18.11-igb_uio-change- > > ISR-to-be-threaded-when-using-with-RT.patch b/recipes- > > extended/dpdk/dpdk/dpdk-18.11-igb_uio-change-ISR-to-be-threaded-when- > > using-with-RT.patch > > new file mode 100644 > > index 0000000..cc1bd79 > > --- /dev/null > > +++ b/recipes-extended/dpdk/dpdk/dpdk-18.11-igb_uio-change-ISR-to-be- > > threaded-when-using-with-RT.patch > > @@ -0,0 +1,85 @@ > > +From 4f335c926ffb87749f8b1ae465445c3cf2a74128 Mon Sep 17 00:00:00 > > 2001 > > +From: Yongxin Liu <yongxin....@windriver.com> > > +Date: Wed, 18 Sep 2019 17:11:09 +0800 > > +Subject: [PATCH] igb_uio: change ISR to be threaded when using with > > RT kernel > > + > > +Non-thread ISR shouldn't call rt_spin_lock which might sleep. > > + > > +Here is the calltrace. > > + > > +[ 2543.830170] Call Trace: > > +[ 2543.833179] <IRQ> > > +[ 2543.835757] dump_stack+0x70/0x9a > > +[ 2543.839638] ___might_sleep.cold+0xe1/0xf2 > > +[ 2543.844300] rt_spin_lock+0x55/0x70 > > +[ 2543.848353] ? __wake_up_common_lock+0x61/0xb0 > > +[ 2543.853361] __wake_up_common_lock+0x61/0xb0 > > +[ 2543.858200] __wake_up+0x13/0x20 > > +[ 2543.861993] uio_event_notify+0x2c/0x50 [uio] > > +[ 2543.866916] igbuio_pci_irqhandler+0x1f/0x40 [igb_uio] > > +[ 2543.872620] __handle_irq_event_percpu+0x5f/0x3f0 > > +[ 2543.877888] ? __lock_release.isra.0+0x1aa/0x310 > > +[ 2543.883071] ? debug_smp_processor_id+0x21/0x110 > > +[ 2543.888253] handle_irq_event_percpu+0x4b/0x90 > > +[ 2543.893262] handle_irq_event+0x3c/0x5b > > +[ 2543.897663] handle_edge_irq+0xbb/0x210 > > +[ 2543.902063] handle_irq+0x23/0x30 > > +[ 2543.905944] do_IRQ+0x7e/0x150 > > +[ 2543.909564] common_interrupt+0xf/0xf > > +[ 2543.913791] </IRQ> > > + > > +Upstream-Status: Inappropriate > > + > > +Signed-off-by: Yongxin Liu <yongxin....@windriver.com> > > +--- > > + kernel/linux/igb_uio/igb_uio.c | 6 +----- > > + 1 file changed, 1 insertion(+), 5 deletions(-) > > + > > +diff --git a/kernel/linux/igb_uio/igb_uio.c > > b/kernel/linux/igb_uio/igb_uio.c > > +index 039f5a5f6..9d7380fb7 100644 > > +--- a/kernel/linux/igb_uio/igb_uio.c > > ++++ b/kernel/linux/igb_uio/igb_uio.c > > +@@ -221,7 +221,6 @@ igbuio_pci_enable_interrupts(struct > > rte_uio_pci_dev *udev) > > + msix_entry.entry = 0; > > + if (pci_enable_msix(udev->pdev, &msix_entry, 1) == 0) { > > + dev_dbg(&udev->pdev->dev, "using MSI-X"); > > +- udev->info.irq_flags = IRQF_NO_THREAD; > > + udev->info.irq = msix_entry.vector; > > + udev->mode = RTE_INTR_MODE_MSIX; > > + break; > > +@@ -229,7 +228,6 @@ igbuio_pci_enable_interrupts(struct > > rte_uio_pci_dev *udev) > > + #else > > + if (pci_alloc_irq_vectors(udev->pdev, 1, 1, > > PCI_IRQ_MSIX) == 1) { > > + dev_dbg(&udev->pdev->dev, "using MSI-X"); > > +- udev->info.irq_flags = IRQF_NO_THREAD; > > + udev->info.irq = pci_irq_vector(udev->pdev, 0); > > + udev->mode = RTE_INTR_MODE_MSIX; > > + break; > > +@@ -241,7 +239,6 @@ igbuio_pci_enable_interrupts(struct > > rte_uio_pci_dev *udev) > > + #ifndef HAVE_ALLOC_IRQ_VECTORS > > + if (pci_enable_msi(udev->pdev) == 0) { > > + dev_dbg(&udev->pdev->dev, "using MSI"); > > +- udev->info.irq_flags = IRQF_NO_THREAD; > > + udev->info.irq = udev->pdev->irq; > > + udev->mode = RTE_INTR_MODE_MSI; > > + break; > > +@@ -249,7 +246,6 @@ igbuio_pci_enable_interrupts(struct > > rte_uio_pci_dev *udev) > > + #else > > + if (pci_alloc_irq_vectors(udev->pdev, 1, 1, > > PCI_IRQ_MSI) == 1) { > > + dev_dbg(&udev->pdev->dev, "using MSI"); > > +- udev->info.irq_flags = IRQF_NO_THREAD; > > + udev->info.irq = pci_irq_vector(udev->pdev, 0); > > + udev->mode = RTE_INTR_MODE_MSI; > > + break; > > +@@ -259,7 +255,7 @@ igbuio_pci_enable_interrupts(struct > > rte_uio_pci_dev *udev) > > + case RTE_INTR_MODE_LEGACY: > > + if (pci_intx_mask_supported(udev->pdev)) { > > + dev_dbg(&udev->pdev->dev, "using INTX"); > > +- udev->info.irq_flags = IRQF_SHARED | > > IRQF_NO_THREAD; > > ++ udev->info.irq_flags = IRQF_SHARED; > > + udev->info.irq = udev->pdev->irq; > > + udev->mode = RTE_INTR_MODE_LEGACY; > > + break; > > +-- > > +2.14.4 > > + > > diff --git a/recipes-extended/dpdk/dpdk_17.11.6.bb b/recipes- > > extended/dpdk/dpdk_17.11.6.bb > > index 40edd8b..b9ce69c 100644 > > --- a/recipes-extended/dpdk/dpdk_17.11.6.bb > > +++ b/recipes-extended/dpdk/dpdk_17.11.6.bb > > @@ -13,6 +13,10 @@ SRC_URI += "\ > > file://dpdk-17.11-mk-disable-warning-for-packed-member- > > pointer.patch \ > > file://dpdk-17.11-igb_uio-fix-build-on-Linux-5.3-for-fall- > > through.patch \ > > " > > +SRC_URI += "${@bb.utils.contains('PREFERRED_PROVIDER_virtual/kernel' > > ,\ > > + 'linux-yocto-rt',\ > > + 'file://dpdk-17.11-igb_uio-change-ISR-to-be-threaded- > > when-using-with-RT.patch',\ > > + '',d)}" > > > > do_install_append () { > > # Remove the unneeded dir > > diff --git a/recipes-extended/dpdk/dpdk_18.11.2.bb b/recipes- > > extended/dpdk/dpdk_18.11.2.bb > > index 5291bdc..1d2ebb6 100644 > > --- a/recipes-extended/dpdk/dpdk_18.11.2.bb > > +++ b/recipes-extended/dpdk/dpdk_18.11.2.bb > > @@ -12,6 +12,10 @@ LIC_FILES_CHKSUM = " > > file://license/gpl-2.0.txt;md5=b234ee4d69f5fce4486a80fdaf4a4 > > SRC_URI += "\ > > file://dpdk-18.11-igb_uio-fix-build-on-Linux-5.3-for-fall- > > through.patch \ > > " > > +SRC_URI += "${@bb.utils.contains('PREFERRED_PROVIDER_virtual/kernel' > > ,\ > > + 'linux-yocto-rt',\ > > + 'file://dpdk-18.11-igb_uio-change-ISR-to-be-threaded- > > when-using-with-RT.patch',\ > > + '',d)}" > > > > do_install_append () { > > # Remove the unneeded dir -- _______________________________________________ meta-intel mailing list meta-intel@yoctoproject.org https://lists.yoctoproject.org/listinfo/meta-intel