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diff --git a/include/linux/slab.h b/include/linux/slab.h | |
index b5f5ee8308d0..aad7ffe6c45a 100644 | |
--- a/include/linux/slab.h | |
+++ b/include/linux/slab.h | |
@@ -778,4 +778,6 @@ size_t kmalloc_size_roundup(size_t size); | |
void __init kmem_cache_init_late(void); | |
+const char *folio_cache_name(const struct folio *folio); | |
+ |
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# perf stat -e task-clock:u -e cycles:u -e instructions:u -e branches:u -e branch-misses:u -e dTLB-loads:u -e dTLB-load-misses:u -e dtlb_load_misses.walk_active:u ./spec_test map | |
Performance counter stats for './spec_test map': | |
1,150.38 msec task-clock:u # 1.000 CPUs utilized | |
5,370,185,772 cycles:u # 4.668 GHz | |
1,331,717,669 instructions:u # 0.25 insn per cycle | |
307,326,910 branches:u # 267.153 M/sec | |
102,502,300 branch-misses:u # 33.35% of all branches | |
102,427,183 dTLB-loads # 89.038 M/sec |
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--- memtester-orig/memtester-4.3.0/tests.c 2012-06-09 23:45:22.000000000 +0200 | |
+++ memtester-4.3.0/tests.c 2018-06-24 18:08:03.194020598 +0200 | |
@@ -11,14 +11,17 @@ | |
* This file contains the functions for the actual tests, called from the | |
* main routine in memtester.c. See other comments in that file. | |
* | |
*/ | |
+#define _GNU_SOURCE | |
#include <sys/types.h> |
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~/tmp/pdf$ cat localtime_hack.c | |
#include <time.h> | |
__attribute__((constructor)) static void localtime_hack(void) { | |
time_t t = {0}; | |
localtime(&t); | |
} | |
~/tmp/pdf$ gcc -shared -fPIC -o localtime_hack.so localtime_hack.c | |
~/tmp/pdf$ LD_BIND_NOW=1 LD_PRELOAD=./localtime_hack.so strace -f -e trace='!write,pread64,brk' pdftoppm test.pdf test.png 2>&1 | grep -A10000000 'open.*test\.pdf' | |
openat(AT_FDCWD, "test.pdf", O_RDONLY) = 3 |
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From 0bc2bc09d4c23cc5b48cea4bc2fb926a1fa72598 Mon Sep 17 00:00:00 2001 | |
From: Jann Horn <jannh@google.com> | |
Date: Fri, 12 Apr 2019 16:13:30 +0200 | |
Subject: [PATCH] objtool: Handle multiply-referenced and | |
out-of-order-referenced jump tables | |
With clang from git master, code can be generated where a function contains | |
two indirect jump instructions that use the same switch table. To deal with | |
this case and similar ones properly, convert the switch table parsing to | |
use two passes: |
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diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S | |
index 957dfb693ecc..251ed2ca3f04 100644 | |
--- a/arch/x86/entry/entry_64.S | |
+++ b/arch/x86/entry/entry_64.S | |
@@ -1673,9 +1673,26 @@ ENTRY(rewind_stack_do_exit) | |
/* Prevent any naive code from trying to unwind to our caller. */ | |
xorl %ebp, %ebp | |
+ movq %rdi, %r14 | |
+ |
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import os | |
import struct | |
# flags are encoded into chunk size | |
FLAGS_MASK = 0x7 | |
PAGEMAP_PRESENT = 1<<63 | |
PAGEMAP_SWAPPED = 1<<62 | |
main_arena = gdb.parse_and_eval('&main_arena') | |
bins_per_arena = int(gdb.parse_and_eval( |
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// small stack memory usage experiment | |
// written by Jann Horn | |
#include <stdint.h> | |
#include <sys/ptrace.h> | |
#include <sys/user.h> | |
#include <fcntl.h> | |
#include <err.h> | |
#include <unistd.h> | |
#include <stdlib.h> |
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0x0 Twux 0x7aa7000 | |
0x0 Twux 0x8b4bf000 | |
0x400000 Twux 0x77c9000 | |
0x400000 P-ux 0x11f46000 | |
0x600000 Twux 0x72da000 | |
0x600000 P-u- 0x11f47000L | |
0x601000 Pwu- 0x11ec8000L | |
0x1e00000 Twux 0x79fb000 | |
0x1f13000 Pwu- 0x11f7a000L | |
0x1f14000 Pwu- 0x11f7b000L |
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$ ./perf_sample_regs_intr_demo | |
data_head is at ff0 | |
rax=0xffffffffffffffff rbp=0x7ffc9ec04170 rsp=0x7ffc9ec040b8 rip=0x4005b0 | |
rax=0xfffffffffffffff7 rbp=0xffffa5fc43efff48 rsp=0xffffa5fc43efff28 rip=0xffffffff97c55f1d | |
rax=0xfffffffffffffff7 rbp=0x7ffc9ec04170 rsp=0x7ffc9ec040b8 rip=0xffffffff9862ce18 | |
rax=0xffff8fc3ba3b79c0 rbp=0xffffa5fc43efff00 rsp=0xffffa5fc43effef0 rip=0xffffffff97c745c9 | |
rax=0xfffffffffffffff7 rbp=0x7ffc9ec04170 rsp=0x7ffc9ec040b8 rip=0xffffffff9862ce18 | |
rax=0x0 rbp=0xffffa5fc43efff00 rsp=0xffffa5fc43effef8 rip=0xffffffff97c75049 | |
rax=0xfffffffffffffff7 rbp=0x7ffc9ec04170 rsp=0x7ffc9ec040b8 rip=0xffffffff9862ce15 | |
rax=0xffffffffffffffff rbp=0x7ffc9ec04170 rsp=0x7ffc9ec040c0 rip=0x4007d5 |
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