# git rev-parse -q --verify 5695e51619745d4fe3ec2506a2f0cd982c5e27a4^{commit} 5695e51619745d4fe3ec2506a2f0cd982c5e27a4 already have revision, skipping fetch # git checkout -q -f -B kisskb 5695e51619745d4fe3ec2506a2f0cd982c5e27a4 # git clean -qxdf # < git log -1 # commit 5695e51619745d4fe3ec2506a2f0cd982c5e27a4 # Merge: 5ceabb6078b8 d6ce7f6761bf # Author: Linus Torvalds # Date: Sat Feb 27 08:29:02 2021 -0800 # # Merge tag 'io_uring-worker.v3-2021-02-25' of git://git.kernel.dk/linux-block # # Pull io_uring thread rewrite from Jens Axboe: # "This converts the io-wq workers to be forked off the tasks in question # instead of being kernel threads that assume various bits of the # original task identity. # # This kills > 400 lines of code from io_uring/io-wq, and it's the worst # part of the code. We've had several bugs in this area, and the worry # is always that we could be missing some pieces for file types doing # unusual things (recent /dev/tty example comes to mind, userfaultfd # reads installing file descriptors is another fun one... - both of # which need special handling, and I bet it's not the last weird oddity # we'll find). # # With these identical workers, we can have full confidence that we're # never missing anything. That, in itself, is a huge win. Outside of # that, it's also more efficient since we're not wasting space and code # on tracking state, or switching between different states. # # I'm sure we're going to find little things to patch up after this # series, but testing has been pretty thorough, from the usual # regression suite to production. Any issue that may crop up should be # manageable. # # There's also a nice series of further reductions we can do on top of # this, but I wanted to get the meat of it out sooner rather than later. # The general worry here isn't that it's fundamentally broken. Most of # the little issues we've found over the last week have been related to # just changes in how thread startup/exit is done, since that's the main # difference between using kthreads and these kinds of threads. In fact, # if all goes according to plan, I want to get this into the 5.10 and # 5.11 stable branches as well. # # That said, the changes outside of io_uring/io-wq are: # # - arch setup, simple one-liner to each arch copy_thread() # implementation. # # - Removal of net and proc restrictions for io_uring, they are no # longer needed or useful" # # * tag 'io_uring-worker.v3-2021-02-25' of git://git.kernel.dk/linux-block: (30 commits) # io-wq: remove now unused IO_WQ_BIT_ERROR # io_uring: fix SQPOLL thread handling over exec # io-wq: improve manager/worker handling over exec # io_uring: ensure SQPOLL startup is triggered before error shutdown # io-wq: make buffered file write hashed work map per-ctx # io-wq: fix race around io_worker grabbing # io-wq: fix races around manager/worker creation and task exit # io_uring: ensure io-wq context is always destroyed for tasks # arch: ensure parisc/powerpc handle PF_IO_WORKER in copy_thread() # io_uring: cleanup ->user usage # io-wq: remove nr_process accounting # io_uring: flag new native workers with IORING_FEAT_NATIVE_WORKERS # net: remove cmsg restriction from io_uring based send/recvmsg calls # Revert "proc: don't allow async path resolution of /proc/self components" # Revert "proc: don't allow async path resolution of /proc/thread-self components" # io_uring: move SQPOLL thread io-wq forked worker # io-wq: make io_wq_fork_thread() available to other users # io-wq: only remove worker from free_list, if it was there # io_uring: remove io_identity # io_uring: remove any grabbing of context # ... # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux-ld --version # < git log --format=%s --max-count=1 5695e51619745d4fe3ec2506a2f0cd982c5e27a4 # < make -s -j 48 ARCH=mips O=/kisskb/build/linus_mips-defconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux- defconfig # < make -s -j 48 ARCH=mips O=/kisskb/build/linus_mips-defconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux- help # make -s -j 48 ARCH=mips O=/kisskb/build/linus_mips-defconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux- olddefconfig # make -s -j 48 ARCH=mips O=/kisskb/build/linus_mips-defconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/mips-linux/bin/mips-linux- FIT description: Linux 5.11.0-g5695e5161974 Created: Sun Feb 28 08:46:37 2021 Image 0 (kernel@0) Description: Linux 5.11.0-g5695e5161974 Created: Sun Feb 28 08:46:37 2021 Type: Kernel Image Compression: gzip compressed Data Size: 5228879 Bytes = 5106.33 KiB = 4.99 MiB Architecture: MIPS OS: Linux Load Address: 0x80100000 Entry Point: 0x809a2e8c Hash algo: sha1 Hash value: e9ace10417a6a8590d41500f356701ba3f7e3aa2 Image 1 (fdt@boston) Description: img,boston Device Tree Created: Sun Feb 28 08:46:37 2021 Type: Flat Device Tree Compression: uncompressed Data Size: 3793 Bytes = 3.70 KiB = 0.00 MiB Architecture: MIPS Hash algo: sha1 Hash value: 4799f50d688573234da6e9d7701234d394759ef4 Image 2 (fdt@ni169445) Description: NI 169445 device tree Created: Sun Feb 28 08:46:37 2021 Type: Flat Device Tree Compression: uncompressed Data Size: 1871 Bytes = 1.83 KiB = 0.00 MiB Architecture: MIPS Hash algo: sha1 Hash value: 51b89b31605ee62038c8468c429af091dfc75ec7 Image 3 (fdt@ocelot_pcb123) Description: MSCC Ocelot PCB123 Device Tree Created: Sun Feb 28 08:46:37 2021 Type: Flat Device Tree Compression: uncompressed Data Size: 4659 Bytes = 4.55 KiB = 0.00 MiB Architecture: MIPS Hash algo: sha1 Hash value: 5bcb6e4f21e8e5372544aa130b3bd097355a9050 Image 4 (fdt@ocelot_pcb120) Description: MSCC Ocelot PCB120 Device Tree Created: Sun Feb 28 08:46:37 2021 Type: Flat Device Tree Compression: uncompressed Data Size: 5418 Bytes = 5.29 KiB = 0.01 MiB Architecture: MIPS Hash algo: sha1 Hash value: 93d882f2009a217e0fa9dab94788535ed2be8476 Image 5 (fdt@xilfpga) Description: MIPSfpga (xilfpga) Device Tree Created: Sun Feb 28 08:46:37 2021 Type: Flat Device Tree Compression: uncompressed Data Size: 2708 Bytes = 2.64 KiB = 0.00 MiB Architecture: MIPS Hash algo: sha1 Hash value: 63d058b780f65e22da30f0a183433765f1807f1d Default Configuration: 'conf@default' Configuration 0 (conf@default) Description: Generic Linux kernel Kernel: kernel@0 Configuration 1 (conf@boston) Description: Boston Linux kernel Kernel: kernel@0 FDT: fdt@boston Configuration 2 (conf@ni169445) Description: NI 169445 Linux Kernel Kernel: kernel@0 FDT: fdt@ni169445 Configuration 3 (conf@ocelot_pcb123) Description: Ocelot Linux kernel Kernel: kernel@0 FDT: fdt@ocelot_pcb123 Configuration 4 (conf@ocelot_pcb120) Description: Ocelot Linux kernel Kernel: kernel@0 FDT: fdt@ocelot_pcb120 Configuration 5 (conf@xilfpga) Description: MIPSfpga Linux kernel Kernel: kernel@0 FDT: fdt@xilfpga Completed OK # rm -rf /kisskb/build/linus_mips-defconfig_mips-gcc8 # Build took: 0:01:57.292264