gh0s7/mckernel
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

do_syscall(): eliminate centralized lock for exit/kill code path (use IKC2 thread pool)

Browse Source
This commit is contained in:
Balazs Gerofi
2017-01-08 11:56:23 +09:00
parent 0e67e9266b
commit cdffc5e853
2 changed files with 0 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
kernel/init.c
View File

@@ -336,11 +336,8 @@ static void post_init(void)
} }
if (find_command_line("hidos")) { if (find_command_line("hidos")) {
extern ihk_spinlock_t syscall_lock;
init_host_syscall_channel(); init_host_syscall_channel();
init_host_syscall_channel2(); init_host_syscall_channel2();
ihk_mc_spinlock_init(&syscall_lock);
} }
arch_setup_vdso(); arch_setup_vdso();

13
kernel/syscall.c
View File

@@ -267,16 +267,12 @@ static void send_syscall(struct syscall_request *req, int cpu, int pid, struct s
#endif #endif
} }
ihk_spinlock_t syscall_lock;
long do_syscall(struct syscall_request *req, int cpu, int pid) long do_syscall(struct syscall_request *req, int cpu, int pid)
{ {
struct syscall_response res; struct syscall_response res;
struct syscall_request req2 IHK_DMA_ALIGN; struct syscall_request req2 IHK_DMA_ALIGN;
int error; int error;
long rc; long rc;
int islock = 0;
unsigned long irqstate;
struct thread *thread = cpu_local_var(current); struct thread *thread = cpu_local_var(current);
struct process *proc = thread->proc; struct process *proc = thread->proc;
#ifdef TRACK_SYSCALLS #ifdef TRACK_SYSCALLS
@@ -288,7 +284,6 @@ long do_syscall(struct syscall_request *req, int cpu, int pid)
ihk_mc_get_processor_id(), ihk_mc_get_processor_id(),
req->number); req->number);
irqstate = 0; /* for avoidance of warning */
barrier(); barrier();
if(req->number != __NR_exit_group){ if(req->number != __NR_exit_group){
@@ -299,11 +294,6 @@ long do_syscall(struct syscall_request *req, int cpu, int pid)
++thread->in_syscall_offload; ++thread->in_syscall_offload;
} }
if(req->number == __NR_exit_group ||
req->number == __NR_kill){ // interrupt syscall
islock = 1;
irqstate = ihk_mc_spinlock_lock(&syscall_lock);
}
/* The current thread is the requester and any thread from /* The current thread is the requester and any thread from
* the pool may serve the request */ * the pool may serve the request */
req->rtid = cpu_local_var(current)->tid; req->rtid = cpu_local_var(current)->tid;
@@ -394,9 +384,6 @@ long do_syscall(struct syscall_request *req, int cpu, int pid)
__FUNCTION__, req->number, res.ret); __FUNCTION__, req->number, res.ret);
rc = res.ret; rc = res.ret;
if(islock){
ihk_mc_spinlock_unlock(&syscall_lock, irqstate);
}
if(req->number != __NR_exit_group){ if(req->number != __NR_exit_group){
--thread->in_syscall_offload; --thread->in_syscall_offload;