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kmalloc(): try to get from remote_free list when regular is empty

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Balazs Gerofi
2017-08-17 16:39:05 +09:00
parent 6e289e8d9f
commit aeef55d1b0
1 changed files with 26 additions and 0 deletions
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26
kernel/mem.c
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@ -2192,6 +2192,7 @@ static void *___kmalloc(int size, ihk_mc_ap_flag flag)
int npages; int npages;
unsigned long kmalloc_irq_flags = cpu_disable_interrupt_save(); unsigned long kmalloc_irq_flags = cpu_disable_interrupt_save();
retry_malloc:
/* KMALLOC_MIN_SIZE bytes aligned size. */ /* KMALLOC_MIN_SIZE bytes aligned size. */
if (size & KMALLOC_MIN_MASK) { if (size & KMALLOC_MIN_MASK) {
size = ((size + KMALLOC_MIN_SIZE - 1) & ~(KMALLOC_MIN_MASK)); size = ((size + KMALLOC_MIN_SIZE - 1) & ~(KMALLOC_MIN_MASK));
@ -2226,7 +2227,32 @@ split_and_return:
cpu_restore_interrupt(kmalloc_irq_flags); cpu_restore_interrupt(kmalloc_irq_flags);
return ((void *)chunk + sizeof(struct kmalloc_header)); return ((void *)chunk + sizeof(struct kmalloc_header));
} }
/* See remote list before falling back to page_alloc */
else {
int retry = 0;
struct kmalloc_header *chunk, *tmp;
unsigned long irqflags =
ihk_mc_spinlock_lock(
&cpu_local_var(remote_free_list_lock));
/* Clean up remotely deallocated chunks */
list_for_each_entry_safe(chunk, tmp,
&cpu_local_var(remote_free_list), list) {
list_del(&chunk->list);
___kmalloc_insert_chunk(&cpu_local_var(free_list), chunk);
if (chunk->size >= size) {
retry = 1;
}
}
ihk_mc_spinlock_unlock(&cpu_local_var(remote_free_list_lock),
irqflags);
/* Found anything? */
if (retry) {
goto retry_malloc;
}
}
/* Allocate new memory and add it to free list */ /* Allocate new memory and add it to free list */
npages = (size + sizeof(struct kmalloc_header) + (PAGE_SIZE - 1)) npages = (size + sizeof(struct kmalloc_header) + (PAGE_SIZE - 1))