mirror of
https://github.com/edk2-porting/linux-next.git
synced 2025-01-12 07:34:08 +08:00
005b2a9dc8
-----BEGIN PGP SIGNATURE----- iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAl/YJxsQHGF4Ym9lQGtl cm5lbC5kawAKCRD301j7KXHgpjpyEACBdW+YjenjTbkUPeEXzQgkBkTZUYw3g007 DPcUT1g8PQZXYXlQvBKCvGhhIr7/KVcjepKoowiNQfBNGcIPJTVopW58nzpqAfTQ goI2WYGn5EKFFKBPvtH04cJD/Wo8muXdxynKtqyZbnGGgZjQxPrE259b8dpHjBSR 6L7HHkk0D1oU/5b6h6Ocpg9mc/0iIUCZylySAYY3eGO0JaVPJaXgZSJZYgHxCHll Lb+/y/fXdtm/0PmQ3ko0ev54g3yEWqZIX0NsZW1asrButIy+KLzQ2Mz1xFLFDMag prtIfwb8tzgc4dFPY090C/azjCh5CPpxqYS6FkRwS0p86n6OhkyXrqfily5Hs4/B NC7CBPBSH/j+NKUK7CYZcpTzTpxPjUr9p0anUdlvMJz8FhTb/3YEEZ1UTeWOeHmk Yo5SxnFghLeZZeZ1ok6rdymnVa7WEX12SCLGQX31BB2mld0tNbKb4b+FsBF6OUMk IUaX6OjwDFVRaysC88BQ4hjcIP1HxsViG4/VZDX15gjAAH2Pvb+7tev+lcDcOhjz TCD4GNFspTFzRhh9nT7oxQ679qCh9G9zHbzuIRewnrS6iqvo5SJQB3dR2yrWZRRH ySkQFiHpYOlnLJYv0jg9COlGwo2FUdcvKhCvkjQKKBz48rzW/IC0LwKdRQWZDFk3 FKGzP/NBig== =cadT -----END PGP SIGNATURE----- Merge tag 'tif-task_work.arch-2020-12-14' of git://git.kernel.dk/linux-block Pull TIF_NOTIFY_SIGNAL updates from Jens Axboe: "This sits on top of of the core entry/exit and x86 entry branch from the tip tree, which contains the generic and x86 parts of this work. Here we convert the rest of the archs to support TIF_NOTIFY_SIGNAL. With that done, we can get rid of JOBCTL_TASK_WORK from task_work and signal.c, and also remove a deadlock work-around in io_uring around knowing that signal based task_work waking is invoked with the sighand wait queue head lock. The motivation for this work is to decouple signal notify based task_work, of which io_uring is a heavy user of, from sighand. The sighand lock becomes a huge contention point, particularly for threaded workloads where it's shared between threads. Even outside of threaded applications it's slower than it needs to be. Roman Gershman <romger@amazon.com> reported that his networked workload dropped from 1.6M QPS at 80% CPU to 1.0M QPS at 100% CPU after io_uring was changed to use TIF_NOTIFY_SIGNAL. The time was all spent hammering on the sighand lock, showing 57% of the CPU time there [1]. There are further cleanups possible on top of this. One example is TIF_PATCH_PENDING, where a patch already exists to use TIF_NOTIFY_SIGNAL instead. Hopefully this will also lead to more consolidation, but the work stands on its own as well" [1] https://github.com/axboe/liburing/issues/215 * tag 'tif-task_work.arch-2020-12-14' of git://git.kernel.dk/linux-block: (28 commits) io_uring: remove 'twa_signal_ok' deadlock work-around kernel: remove checking for TIF_NOTIFY_SIGNAL signal: kill JOBCTL_TASK_WORK io_uring: JOBCTL_TASK_WORK is no longer used by task_work task_work: remove legacy TWA_SIGNAL path sparc: add support for TIF_NOTIFY_SIGNAL riscv: add support for TIF_NOTIFY_SIGNAL nds32: add support for TIF_NOTIFY_SIGNAL ia64: add support for TIF_NOTIFY_SIGNAL h8300: add support for TIF_NOTIFY_SIGNAL c6x: add support for TIF_NOTIFY_SIGNAL alpha: add support for TIF_NOTIFY_SIGNAL xtensa: add support for TIF_NOTIFY_SIGNAL arm: add support for TIF_NOTIFY_SIGNAL microblaze: add support for TIF_NOTIFY_SIGNAL hexagon: add support for TIF_NOTIFY_SIGNAL csky: add support for TIF_NOTIFY_SIGNAL openrisc: add support for TIF_NOTIFY_SIGNAL sh: add support for TIF_NOTIFY_SIGNAL um: add support for TIF_NOTIFY_SIGNAL ... |
||
|---|---|---|
| .. | ||
| syscalls | ||
| .gitignore | ||
| asm-offsets.c | ||
| audit.c | ||
| binfmt_loader.c | ||
| bugs.c | ||
| console.c | ||
| core_apecs.c | ||
| core_cia.c | ||
| core_irongate.c | ||
| core_lca.c | ||
| core_marvel.c | ||
| core_mcpcia.c | ||
| core_polaris.c | ||
| core_t2.c | ||
| core_titan.c | ||
| core_tsunami.c | ||
| core_wildfire.c | ||
| entry.S | ||
| err_common.c | ||
| err_ev6.c | ||
| err_ev7.c | ||
| err_impl.h | ||
| err_marvel.c | ||
| err_titan.c | ||
| es1888.c | ||
| gct.c | ||
| head.S | ||
| io.c | ||
| irq_alpha.c | ||
| irq_i8259.c | ||
| irq_impl.h | ||
| irq_pyxis.c | ||
| irq_srm.c | ||
| irq.c | ||
| machvec_impl.h | ||
| Makefile | ||
| module.c | ||
| osf_sys.c | ||
| pc873xx.c | ||
| pc873xx.h | ||
| pci_impl.h | ||
| pci_iommu.c | ||
| pci-noop.c | ||
| pci-sysfs.c | ||
| pci.c | ||
| perf_event.c | ||
| process.c | ||
| proto.h | ||
| ptrace.c | ||
| rtc.c | ||
| setup.c | ||
| signal.c | ||
| smc37c93x.c | ||
| smc37c669.c | ||
| smp.c | ||
| srm_env.c | ||
| srmcons.c | ||
| sys_alcor.c | ||
| sys_cabriolet.c | ||
| sys_dp264.c | ||
| sys_eb64p.c | ||
| sys_eiger.c | ||
| sys_jensen.c | ||
| sys_marvel.c | ||
| sys_miata.c | ||
| sys_mikasa.c | ||
| sys_nautilus.c | ||
| sys_noritake.c | ||
| sys_rawhide.c | ||
| sys_ruffian.c | ||
| sys_rx164.c | ||
| sys_sable.c | ||
| sys_sio.c | ||
| sys_sx164.c | ||
| sys_takara.c | ||
| sys_titan.c | ||
| sys_wildfire.c | ||
| systbls.S | ||
| time.c | ||
| traps.c | ||
| vmlinux.lds.S | ||