static inline struct page_descriptor *get_kmalloc_pages( unsigned long priority, unsigned long order, int dma )
{
uint32 nPtr;
int nRetryCount = 0;
for ( ;; )
{
nPtr = get_free_pages( /* priority, */ ( 1 << order ), dma | MEMF_CLEAR );
if ( ( priority & MEMF_NOBLOCK ) || nPtr != 0 )
{
if ( nPtr != 0 )
{
atomic_add( &g_sSysBase.ex_nKernelMemPages, ( 1 << order ) );
}
break;
}
if ( shrink_caches( ( 1 << order ) * PAGE_SIZE ) == 0 && ( priority & MEMF_OKTOFAIL ) )
{
break;
}
if ( nRetryCount++ > 100 )
{
if ( nRetryCount % 10 == 0 )
{
printk( "get_kmalloc_pages( %d ) retried %d times\n", ( 1 << order ), nRetryCount );
}
}
}
return ( ( struct page_descriptor * )nPtr );
}
int try_to_free_pages(zone_t *classzone, unsigned int gfp_mask, unsigned int order)
{
int priority = DEF_PRIORITY;
int nr_pages = SWAP_CLUSTER_MAX;
gfp_mask = pf_gfp_mask(gfp_mask);
do {
nr_pages = shrink_caches(classzone, priority, gfp_mask, nr_pages);
if (nr_pages <= 0)
return 1;
} while (--priority);
/*
* Hmm.. Cache shrink failed - time to kill something?
* Mhwahahhaha! This is the part I really like. Giggle.
*/
out_of_memory();
return 0;
}
int try_to_free_pages_zone(zone_t *classzone, unsigned int gfp_mask)
{
gfp_mask = pf_gfp_mask(gfp_mask);
for (;;) {
int tries = vm_passes;
int failed_swapout = !(gfp_mask & __GFP_IO);
int nr_pages = SWAP_CLUSTER_MAX;
do {
nr_pages = shrink_caches(classzone, gfp_mask, nr_pages, &failed_swapout);
if (nr_pages <= 0)
return 1;
shrink_dcache_memory(vm_vfs_scan_ratio, gfp_mask);
shrink_icache_memory(vm_vfs_scan_ratio, gfp_mask);
#ifdef CONFIG_QUOTA
shrink_dqcache_memory(vm_vfs_scan_ratio, gfp_mask);
#endif
if (!failed_swapout)
failed_swapout = !swap_out(classzone);
} while (--tries);
#ifdef CONFIG_OOM_KILLER
out_of_memory();
#else
if (likely(current->pid != 1))
break;
if (!check_classzone_need_balance(classzone))
break;
__set_current_state(TASK_RUNNING);
yield();
#endif
}
return 0;
}
