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Make the kmalloc global stats variable volatile.

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I know I'm praying for cargo here, but this does fix a weird issue
where logging the sum_alloc and sum_free globals wouldn't display
symmetric values all the time.
This commit is contained in:
Andreas Kling 2018-10-24 01:02:55 +02:00
parent 82dae8fc90
commit a5caf7ca99
Notes: sideshowbarker 2024-07-19 18:39:37 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/a5caf7ca991
3 changed files with 15 additions and 4 deletions
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11
Kernel/Task.cpp
View File

@ -497,6 +497,17 @@ bool scheduleNewTask()
if (task == prevHead) {
// Back at task_head, nothing wants to run.
kprintf("Nothing wants to run!\n");
kprintf("PID OWNER STATE NSCHED NAME\n");
for (auto* task = s_tasks->head(); task; task = task->next()) {
kprintf("%w %w:%w %b %w %s\n",
task->pid(),
task->uid(),
task->gid(),
task->state(),
task->timesScheduled(),
task->name().characters());
}
kprintf("Switch to kernel task\n");
return contextSwitch(Task::kernelTask());
}

4
Kernel/kmalloc.cpp
View File

@ -27,8 +27,8 @@ typedef struct
PRIVATE BYTE alloc_map[POOL_SIZE / CHUNK_SIZE / 8];
DWORD sum_alloc = 0;
DWORD sum_free = POOL_SIZE;
volatile DWORD sum_alloc = 0;
volatile DWORD sum_free = POOL_SIZE;
static SpinLock s_kmallocLock;

4
Kernel/kmalloc.h
View File

@ -4,8 +4,8 @@ void kmalloc_init();
void *kmalloc(DWORD size) __attribute__ ((malloc));
void kfree(void*);
extern DWORD sum_alloc;
extern DWORD sum_free;
extern volatile DWORD sum_alloc;
extern volatile DWORD sum_free;
inline void* operator new(size_t, void* p) { return p; }
inline void* operator new[](size_t, void* p) { return p; }