# git rev-parse -q --verify faa6d21153fd11e139dd880044521389b34a24f2^{commit} faa6d21153fd11e139dd880044521389b34a24f2 already have revision, skipping fetch # git checkout -q -f -B kisskb faa6d21153fd11e139dd880044521389b34a24f2 # git clean -qxdf # < git log -1 # commit faa6d21153fd11e139dd880044521389b34a24f2 # 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/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 faa6d21153fd11e139dd880044521389b34a24f2 # < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc83xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- mpc83xx_defconfig # make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc83xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- INFO: Uncompressed kernel (size 0x671ea8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Uncompressed kernel (size 0x671ea8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Uncompressed kernel (size 0x671ea8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Uncompressed kernel (size 0x671ea8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Uncompressed kernel (size 0x671ea8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Uncompressed kernel (size 0x671ea8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Uncompressed kernel (size 0x661790) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Uncompressed kernel (size 0x671ea8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) Image Name: Linux-5.3.0-gfaa6d21153fd Created: Wed Sep 25 13:13:30 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3276222 Bytes = 3199.44 KiB = 3.12 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.3.0-gfaa6d21153fd Created: Wed Sep 25 13:13:30 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3305860 Bytes = 3228.38 KiB = 3.15 MiB Load Address: 00700000 Entry Point: 00700294 Image Name: Linux-5.3.0-gfaa6d21153fd Created: Wed Sep 25 13:13:30 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3305252 Bytes = 3227.79 KiB = 3.15 MiB Load Address: 00700000 Entry Point: 00700294 Image Name: Linux-5.3.0-gfaa6d21153fd Created: Wed Sep 25 13:13:30 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3305752 Bytes = 3228.27 KiB = 3.15 MiB Load Address: 00700000 Entry Point: 00700294 Image Name: Linux-5.3.0-gfaa6d21153fd Created: Wed Sep 25 13:13:30 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3305839 Bytes = 3228.36 KiB = 3.15 MiB Load Address: 00700000 Entry Point: 00700294 Image Name: Linux-5.3.0-gfaa6d21153fd Created: Wed Sep 25 13:13:30 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3305462 Bytes = 3227.99 KiB = 3.15 MiB Load Address: 00700000 Entry Point: 00700294 Image Name: Linux-5.3.0-gfaa6d21153fd Created: Wed Sep 25 13:13:30 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3306365 Bytes = 3228.87 KiB = 3.15 MiB Load Address: 00700000 Entry Point: 00700294 Completed OK # rm -rf /kisskb/build/powerpc-fixes_mpc83xx_defconfig_powerpc-gcc5 # Build took: 0:01:00.688426