# git rev-parse -q --verify b6a4fec7d708dcc769f908ce7b308a0de8b3ad8f^{commit} b6a4fec7d708dcc769f908ce7b308a0de8b3ad8f already have revision, skipping fetch # git checkout -q -f -B kisskb b6a4fec7d708dcc769f908ce7b308a0de8b3ad8f # git clean -qxdf # < git log -1 # commit b6a4fec7d708dcc769f908ce7b308a0de8b3ad8f # Author: Aneesh Kumar K.V # Date: Tue Sep 3 18:04:52 2019 +0530 # # powerpc/nvdimm: use H_SCM_QUERY hcall on H_OVERLAP error # # Right now we force an unbind of SCM memory at drcindex on H_OVERLAP error. # This really slows down operations like kexec where we get the H_OVERLAP # error because we don't go through a full hypervisor re init. # # H_OVERLAP error for a H_SCM_BIND_MEM hcall indicates that SCM memory at # drc index is already bound. Since we don't specify a logical memory # address for bind hcall, we can use the H_SCM_QUERY hcall to query # the already bound logical address. # # Boot time difference with and without patch is: # # [ 5.583617] IOMMU table initialized, virtual merging enabled # [ 5.603041] papr_scm ibm,persistent-memory:ibm,pmemory@44104001: Retrying bind after unbinding # [ 301.514221] papr_scm ibm,persistent-memory:ibm,pmemory@44108001: Retrying bind after unbinding # [ 340.057238] hv-24x7: read 1530 catalog entries, created 537 event attrs (0 failures), 275 descs # # after fix # # [ 5.101572] IOMMU table initialized, virtual merging enabled # [ 5.116984] papr_scm ibm,persistent-memory:ibm,pmemory@44104001: Querying SCM details # [ 5.117223] papr_scm ibm,persistent-memory:ibm,pmemory@44108001: Querying SCM details # [ 5.120530] hv-24x7: read 1530 catalog entries, created 537 event attrs (0 failures), 275 descs # # Signed-off-by: Aneesh Kumar K.V # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/20190903123452.28620-2-aneesh.kumar@linux.ibm.com # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version # < git log --format=%s --max-count=1 b6a4fec7d708dcc769f908ce7b308a0de8b3ad8f # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc44x_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- ppc44x_defconfig # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc44x_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/arch/powerpc/boot/dts/virtex440-ml510.dts:335.37-439.6: Warning (pci_bridge): /plb@0/plbv46-pci@85e00000: node name is not "pci" or "pcie" arch/powerpc/boot/dts/virtex440-ml510.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge' /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:194:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/bridge/br_netlink.c: In function 'br_afspec.isra.35': /kisskb/src/net/bridge/br_netlink.c:648:7: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:338:21: note: 'pdeo' was declared here /kisskb/src/drivers/net/tun.c: In function 'tun_get_user': /kisskb/src/drivers/net/tun.c:1836:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/tun.c:1749:46: warning: 'linear' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq': /kisskb/src/drivers/tty/serial/8250/8250_core.c:248:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:228:19: note: 'i' was declared here /kisskb/src/drivers/usb/core/devio.c: In function 'async_completed': /kisskb/src/drivers/usb/core/devio.c:625:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/arch/powerpc/boot/dts/katmai.dts:322.26-361.5: Warning (pci_bridge): /plb/pciex@d00000000: node name is not "pci" or "pcie" /kisskb/src/arch/powerpc/boot/dts/katmai.dts:363.26-402.5: Warning (pci_bridge): /plb/pciex@d20000000: node name is not "pci" or "pcie" /kisskb/src/arch/powerpc/boot/dts/katmai.dts:404.26-443.5: Warning (pci_bridge): /plb/pciex@d40000000: node name is not "pci" or "pcie" arch/powerpc/boot/dts/katmai.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge' INFO: Uncompressed kernel (size 0x55bb9c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x55bb9c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x55bb9c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x55bb9c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x55bb9c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x55bb9c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x55bb9c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x55bb9c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x55bb9c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x55bb9c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x55bb9c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x54b4f0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) Image Name: Linux-5.3.0-gb6a4fec7d708 Created: Tue Sep 24 21:21:07 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2716785 Bytes = 2653.11 KiB = 2.59 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.3.0-gb6a4fec7d708 Created: Tue Sep 24 21:21:07 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2748228 Bytes = 2683.82 KiB = 2.62 MiB Load Address: 00600000 Entry Point: 006014e0 Image Name: Linux-5.3.0-gb6a4fec7d708 Created: Tue Sep 24 21:21:07 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2750002 Bytes = 2685.55 KiB = 2.62 MiB Load Address: 00600000 Entry Point: 006014d8 Image Name: Linux-5.3.0-gb6a4fec7d708 Created: Tue Sep 24 21:21:07 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2750107 Bytes = 2685.65 KiB = 2.62 MiB Load Address: 00600000 Entry Point: 006000c8 Image Name: Linux-5.3.0-gb6a4fec7d708 Created: Tue Sep 24 21:21:07 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2748209 Bytes = 2683.80 KiB = 2.62 MiB Load Address: 00600000 Entry Point: 006014ec Image Name: Linux-5.3.0-gb6a4fec7d708 Created: Tue Sep 24 21:21:07 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2748171 Bytes = 2683.76 KiB = 2.62 MiB Load Address: 00600000 Entry Point: 006014cc Image Name: Linux-5.3.0-gb6a4fec7d708 Created: Tue Sep 24 21:21:07 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2749994 Bytes = 2685.54 KiB = 2.62 MiB Load Address: 00600000 Entry Point: 006014e0 Image Name: Linux-5.3.0-gb6a4fec7d708 Created: Tue Sep 24 21:21:07 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2748069 Bytes = 2683.66 KiB = 2.62 MiB Load Address: 00600000 Entry Point: 006001bc Image Name: Linux-5.3.0-gb6a4fec7d708 Created: Tue Sep 24 21:21:07 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2750018 Bytes = 2685.56 KiB = 2.62 MiB Load Address: 00600000 Entry Point: 006014c0 Image Name: Linux-5.3.0-gb6a4fec7d708 Created: Tue Sep 24 21:21:07 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2748085 Bytes = 2683.68 KiB = 2.62 MiB Load Address: 00600000 Entry Point: 006014e0 Completed OK # rm -rf /kisskb/build/powerpc-fixes_ppc44x_defconfig_powerpc-gcc4.6 # Build took: 0:00:51.696539