Anton Ivanov 742f3c8193 um: Optimize Flush TLB for force/fork case ...

When UML handles a fork the page tables need to be brought up
to date. That was done using brute force - full tlb flush.

This is actually unnecessary, because the mapped-in mappings are
all correct and the only mappings which need to be updated
after a flush are any unmaps (so that paging works) as well as
any pending protection changes.

This optimization squeezes out up to 3% from a full kernel rebuild
time under memory pressure.

Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

2018-12-27 22:48:34 +01:00

..

skas

um: Remove unnecessary faulted check in uaccess.c

2018-12-27 22:48:20 +01:00

asm-offsets.c

um: get rid of pointless include "..." where include <...> will do

2012-10-09 22:28:45 +02:00

config.c.in

um: get rid of pointless include "..." where include <...> will do

2012-10-09 22:28:45 +02:00

dyn.lds.S

Construct init thread stack in the linker script rather than by union

2018-01-09 23:21:02 +00:00

early_printk.c

early_printk: consolidate random copies of identical code

2013-04-29 18:28:13 -07:00

exec.c

sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h>

2017-03-02 08:42:37 +01:00

exitcode.c

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

2016-12-24 11:46:01 -08:00

gmon_syms.c

um: Fix CONFIG_GCOV for modules.

2017-09-13 22:33:54 +02:00

gprof_syms.c

um: get rid of pointless include "..." where include <...> will do

2012-10-09 22:28:45 +02:00

initrd.c

memblock: stop using implicit alignment to SMP_CACHE_BYTES

2018-10-31 08:54:16 -07:00

irq.c

um: NULL check before kfree is not needed

2018-10-29 22:23:12 +01:00

kmsg_dump.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

ksyms.c

um: Move syscall() declaration into os.h

2015-05-31 13:14:07 +02:00

maccess.c

um: Implement probe_kernel_read()

2013-09-07 10:38:34 +02:00

Makefile

um: Support kcov

2016-08-04 00:18:06 +02:00

mem.c

mm: remove include/linux/bootmem.h

2018-10-31 08:54:16 -07:00

physmem.c

mm: remove include/linux/bootmem.h

2018-10-31 08:54:16 -07:00

process.c

um: Fix FP register size for XSTATE/XSAVE

2017-09-13 22:24:38 +02:00

ptrace.c

signal/um: Use force_sig_fault where appropriate

2018-04-25 10:44:11 -05:00

reboot.c

sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h>

2017-03-02 08:42:37 +01:00

sigio.c

um: get rid of pointless include "..." where include <...> will do

2012-10-09 22:28:45 +02:00

signal.c

Revert "um: Fix get_signal() usage"

2016-03-05 22:16:40 +01:00

stacktrace.c

um: Add support for CONFIG_STACKTRACE

2014-10-13 21:46:25 +02:00

syscall.c

mm: add ksys_mmap_pgoff() helper; remove in-kernel calls to sys_mmap_pgoff()

2018-04-02 20:16:11 +02:00

sysrq.c

um: Fix _print_addr()

2017-05-03 22:30:20 +02:00

time.c

um: time: Use timespec64 for persistent clock

2018-02-19 19:38:51 +01:00

tlb.c

um: Optimize Flush TLB for force/fork case

2018-12-27 22:48:34 +01:00

trap.c

um: trap: fix spelling mistake, EACCESS -> EACCES

2018-10-29 22:34:15 +01:00

um_arch.c

Construct init thread stack in the linker script rather than by union

2018-01-09 23:21:02 +00:00

umid.c

um: Use os_warn to print out pre-boot warning/error messages

2017-07-05 23:18:25 +02:00

uml.lds.S

Construct init thread stack in the linker script rather than by union

2018-01-09 23:21:02 +00:00

vmlinux.lds.S

arm, cris, mips, sparc, powerpc, um, xtensa: fix build with bash 4.0

2009-09-20 12:28:22 +02:00