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kmalloc cache refactor and pre-alloc in HFI1 open()

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This commit is contained in:
Balazs Gerofi
2017-08-23 10:17:14 +09:00
parent d35fa16417
commit bd170e63ba
3 changed files with 31 additions and 14 deletions
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36
kernel/mem.c
View File

@ -2615,6 +2615,27 @@ int ihk_mc_get_mem_user_page(void *arg0, page_table_t pt, pte_t *ptep, void *pga
/*
* Generic lockless kmalloc cache.
*/
void kmalloc_cache_prealloc(struct kmalloc_cache_header *cache,
size_t size)
{
struct kmalloc_cache_header *first;
int i;
kprintf("%s: pre-allocating for 0x%lx...\n",
__FUNCTION__, cache);
for (i = 0; i < 128; ++i) {
first = (struct kmalloc_cache_header *)
kmalloc(size, IHK_MC_AP_NOWAIT);
if (!first) {
kprintf("%s: ERROR: allocating cache element\n", __FUNCTION__);
continue;
}
kmalloc_cache_free(cache, first);
}
}
void *kmalloc_cache_alloc(struct kmalloc_cache_header *cache,
size_t size)
{
@ -2633,20 +2654,7 @@ retry:
}
}
else {
int i;
kprintf("%s: cache empty, allocating ...\n", __FUNCTION__);
for (i = 0; i < 100; ++i) {
first = (struct kmalloc_cache_header *)
kmalloc(size, IHK_MC_AP_NOWAIT);
if (!first) {
kprintf("%s: ERROR: allocating cache element\n", __FUNCTION__);
continue;
}
kmalloc_cache_free(cache, first);
}
kmalloc_cache_prealloc(cache, size);
goto retry;
}

3
kernel/syscall.c
View File

@ -483,11 +483,14 @@ long do_syscall(struct syscall_request *req, int cpu, int pid)
if (req->number == __NR_open && rc > 0) {
if (res.private_data &&
!strncmp((const char *)req->args[0], "/dev/hfi", 8)) {
extern void hfi1_txreq_prealloc(void);
thread->proc->fd_priv_table[rc] = res.private_data;
kprintf("%s: PID: %d, open fd: %d, filename: "
"%s, private_data: 0x%lx\n",
__FUNCTION__, thread->proc->pid,
rc, req->args[0], res.private_data);
hfi1_txreq_prealloc();
}
}

6
kernel/user_sdma.c
View File

@ -1216,6 +1216,12 @@ static inline u32 get_lrh_len(struct hfi1_pkt_header hdr, u32 len)
struct kmalloc_cache_header txreq_cache = {NULL};
void hfi1_txreq_prealloc(void)
{
kmalloc_cache_prealloc(&txreq_cache, sizeof(struct user_sdma_txreq));
}
static int user_sdma_send_pkts(struct user_sdma_request *req, unsigned maxpkts)
{
int ret = 0, count;