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Way tighter locking in process creation.

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We no longer disable interrupts around the whole affair.
Since MM manages per-process data structures, this works quite smoothly now.
Only procfs had to be tweaked with an InterruptDisabler.
This commit is contained in:
Andreas Kling 2018-11-01 14:41:49 +01:00
parent 52607aa086
commit 3a901ae36d
3 changed files with 40 additions and 25 deletions
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37
Kernel/init.cpp
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@ -101,6 +101,25 @@ static void undertaker_main()
}
}
static void spawn_stress() NORETURN;
static void spawn_stress()
{
dword lastAlloc = sum_alloc;
for (unsigned i = 0; i < 100; ++i) {
int error;
Process::createUserProcess("/bin/id", (uid_t)100, (gid_t)100, (pid_t)0, error, nullptr, tty0);
kprintf("malloc stats: alloc:%u free:%u\n", sum_alloc, sum_free);
kprintf("delta:%u\n", sum_alloc - lastAlloc);
lastAlloc = sum_alloc;
sleep(600);
}
for (;;) {
asm volatile("hlt");
}
}
static void init_stage2() NORETURN;
static void init_stage2()
{
@ -173,20 +192,6 @@ static void init_stage2()
}
#endif
#ifdef STRESS_TEST_SPAWNING
dword lastAlloc = sum_alloc;
for (unsigned i = 0; i < 100; ++i) {
int error;
auto* shProcess = Process::createUserProcess("/bin/id", (uid_t)100, (gid_t)100, (pid_t)0, error);
kprintf("malloc stats: alloc:%u free:%u\n", sum_alloc, sum_free);
kprintf("sizeof(Process):%u\n", sizeof(Process));
kprintf("delta:%u\n",sum_alloc - lastAlloc);
lastAlloc = sum_alloc;
sleep(600);
}
#endif
int error;
auto* sh0 = Process::createUserProcess("/bin/sh", (uid_t)100, (gid_t)100, (pid_t)0, error, nullptr, tty0);
#ifdef SPAWN_MULTIPLE_SHELLS
@ -195,6 +200,10 @@ static void init_stage2()
auto* sh3 = Process::createUserProcess("/bin/sh", (uid_t)100, (gid_t)100, (pid_t)0, error, nullptr, tty3);
#endif
#ifdef STRESS_TEST_SPAWNING
Process::createKernelProcess(spawn_stress, "spawn_stress");
#endif
#if 0
// It would be nice to exit this process, but right now it instantiates all kinds of things.
// At the very least it needs to be made sure those things stick around as appropriate.