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176土城花屏补丁 传奇盟重补丁_传奇盟重花屏补丁 紧要指示：编制检测到您的帐号可能生活被盗风险，花屏。请尽快稽察风险提示，并即刻窜改密码。传奇花屏补丁下载。 | 封闭 网易博客平和指示：编制检测到您今朝密码的平和性较低，听听盟重土城花屏。为了您的账号平和，传奇进去花屏怎么办。倡议您适时窜改密码 即刻窜改 | 封闭 火伴编制仍然发觉很长一段时间了，玩传奇花屏怎么办。有了一些优化，看了一下，看着sf土城花屏补丁下载。比设想中的庞杂很多啊。其实盟重。 1staudio-videoailable aticvoid __init_refok the wholeoc_node_mem_map(struct pglist_daudio-videoailable ata *pgdaudio-videoailable at) 2 23#ifndef CONFIG_NEED_MULTIPLE_NODES 24/* 设置全局mem_map */ 25if (pgdaudio-videoailable at == NODE_DATA(0)) { 26 mem_map = NODE_DATA(0)->node_mem_map; 27#ifdef CONFIG_ARCH_POPULATES_NODE_MAP 28if (page_to_pfn(mem_map) != pgdaudio-videoailable at->node_stsculptures_pfn) 29 mem_map -= (pgdaudio-videoailable at->node_stsculptures_pfn - ARCH_PFN_OFFSET); 30#endif /* CONFIG_ARCH_POPULATES_NODE_MAP */ 31 } 32#endif 33#endif /* CONFIG_FLAT_NODE_MEM_MAP */ 34} the wholeoc_node_mem_map(struct pglist_daudio-videoailable ata *pgdaudio-videoailable at)用来初始化page。土城花屏补丁下载冰。 1staudio-videoailable aticvoid __polderinit free_are generinglya_init_core(struct pglist_daudio-videoailable ata *pgdaudio-videoailable at. unsigned long*zones_size. unsigned long*zholes_size) 2{ 3enum zone_type j; 4int nid = pgdaudio-videoailable at->node_id; 5 unsigned long zone_stsculptures_pfn = pgdaudio-videoailable at->node_stsculptures_pfn; 6int ret; 7 8/* 在改版一些值的时间要上锁 */ 9 pgdaudio-videoailable at_resize_init(pgdaudio-videoailable at); 10 pgdaudio-videoailable at->nr_zones =0; 11/* 初始化地kswapd等候队列（上锁） */ 12 init_waitqueue_headvertising(&pgdaudio-videoailable at->kswapd_wait); 13 pgdaudio-videoailable at->kswapd_max_order =0; 14/* 循环初始化每个zone布局 */ 15for (j =0; j < MAX_NR_ZONES; j++) { 16struct zone *zone = pgdaudio-videoailable at->node_zones + j; 17 unsigned long size. reingsize. memmap_page groups; 18/* 计算这个zone上的page数量（包括hole） */ 19 size = zone_spa majorned_page groups_in_node(nid. j. zones_size); 20/* 计算现实的值 */ 21 reingsize = size - zone_sttaudio-videoailable ating home_page groups_in_node(nid. j. zholes_size); 22 memmap_page groups = (size *sizeof(struct page)) >> PAGE_SHIFT; 23/* 去掉memmap占用的内存 */ 24if (reingsize >= memmap_page groups) { 25 reingsize -= memmap_page groups; 26 printk(KERN_DEBUG" %s zone: %lu page groups used for memmap\n".zone_nwthaudio-videoailable ates[j]. memmap_page groups); 27 } else 28 printk(KERN_WARNING" %s zone: %lu page groups exceeds reingsize %lu\n". zone_nwthaudio-videoailable ates[j]. memmap_page groups. reingsize); 29/* 去掉用于DMA的内存 */ 30if (j ==0&& reingsize > dma_reserve) { 31 reingsize -= dma_reserve; 32 printk(KERN_DEBUG " %s zone: %lu page groups reserved\n". zone_nwthaudio-videoailable ates[0]. dma_reserve); 33 } 34/* 更新nr_kernel_page groups、nr_the whole_page groups */ 35if (!is_highmem_idx(j)) 36 nr_kernel_page groups += reingsize; 37 nr_the whole_page groups += reingsize; 38/* 更新zone中的讯息 */ 39 zone->spa majorned_page groups = size; 40 zone->present_page groups = reingsize; 41#ifdef CONFIG_NUMA 42 zone->node = nid; 43 zone->min_unmiphone apped_page groups = (reingsize*sysctl_min_unmiphone apped_raudio-videoailable atio) /100; 44 zone->min_slstomair conditioning unith_page groups = (reingsize * sysctl_min_slstomair conditioning unith_raudio-videoailable atio) /100; 45#endif 46 zone->nwthaudio-videoailable ate = zone_nwthaudio-videoailable ates[j]; 47 spin_lock_init(&zone->lock); 48 spin_lock_init(&zone->lru_lock); 49 zone_seqlock_init(zone); 50 zone->zone_pgdaudio-videoailable at = pgdaudio-videoailable at; 51 52 zone->prev_priority = DEF_PRIORITY; 53 54 zone_pcp_init(zone); 55 INIT_LIST_HEAD(&zone->on the go_list); 56 INIT_LIST_HEAD(&zone->inon the go_list); 57 zone->nr_sca major_on the go =0; 58 zone->nr_sca major_inon the go =0; 59/* 把zone中的形态全部初始化为0 */ 60 zap_zone_vm_staudio-videoailable ats(zone); 61 zone->flags =0; 62/* 借使占用的内存年夜小为0，你看传奇盟重补丁。那就就此为止 */ 63if (!size) 64continue; 65 66 set_pageprohilittle bisexualt_order(pageprohilittle bisexualt_default_order()); 67 setup_usemap(pgdaudio-videoailable at. zone. size); 68/* 初始化freelist */ 69 ret = init_currently_empty_zone(zone. zone_stsculptures_pfn. size. MEMMAP_EARLY); 70 BUG_ON(ret); 71/* 初始化内存域的页 */ 72 memmap_init(size. nid. j. zone_stsculptures_pfn); 73 zone_stsculptures_pfn += size; 74 } 75} 下面这段代码初始化了zone布局（其中的各个字段，细致的都在解释里了）。你看补丁。其中还有几个初始化per-CPU相关的数据布局（zone_pcp_init）、初始化freeare generinglya（init_currently_empty_zone）、初始化内存域的页（memmap_init）。传奇盟重补丁。zone_pcp_init函数的代码如下：传奇。 1staudio-videoailable atic __meminit void zone_pcp_init(struct zone *zone) 2{ 3int cpu; 4/* 批照料的年夜小，盛大传奇花屏补丁。每次照料的年夜小是group而不是单页 */ 5 unsigned long group = zone_groupsize(zone); 6/* 按序照料每个CPU */ 7for (cpu =0; cpu < NR_CPUS; cpu++) { 8#ifdef CONFIG_NUMA 9 zone_pcp(zone. cpu) =&trunk_page groupset[cpu]; 10/* 设置page groupset */ 11 setup_page groupset(&trunk_page groupset[cpu].0); 12#else 13 setup_page groupset(zone_pcp(zone.cpu). group); 14#endif 15 } 16if (zone->present_page groups) 17 printk(KERN_DEBUG " %s zone: %lu page groups. LIFO group:%lu\n". 18 zone->nwthaudio-videoailable ate. zone->present_page groups. group); 19} 20staudio-videoailable aticint zone_groupsize(struct zone *zone) 21{ 22int group; 23/* CPU页缓存的年夜大年夜约为zone大小的千分之一 */ 24 group = zone->present_page groups /1024; 25if (group * PAGE_SIZE >512*1024) group = (512*1024) / PAGE_SIZE; 26 group /=4; 27if (group <1) group =1; 28 group = (1<< (fls(group + group/2)-1)) -1; 29return group; 30} 其中热页CPU缓存的热页极可能现在就在CPU的硬件高速缓存中。 下面是init_currently_empty_zone的代码：听说热血传奇花屏。 1__meminit int init_currently_empty_zone(struct zone *zone. unsigned long zone_stsculptures_pfn. unsigned long 2 3size. enum memmap_context context) 4{ 5struct pglist_daudio-videoailable ata *pgdaudio-videoailable at = zone->zone_pgdaudio-videoailable at; 6int ret; 7/* 初始化管理区的等候队列hlung burning thaudio-videoailable ath表和等候队列头.这个就没什么好说的了 */ 8 ret = zone_wait_tstomair conditioning unithle_init(zone. size); 9if (ret) 10return ret; 11 pgdaudio-videoailable at->nr_zones = zone_idx(zone) +1; 12 zone->zone_stsculptures_pfn = zone_stsculptures_pfn; 13/* 初始化管理区的清闲块列表 */ 14 zone_init_free_lists(zone); 15return0; 16} 17staudio-videoailable aticvoid __meminit zone_init_free_lists(struct zone *zone) 18{ 19int order. t; 20/* 这里其实是一个双循环（建的应当是空的吧）.看下面 */ 21 for_every single_migrdined ontype_order(order. t) { 22 INIT_LIST_HEAD(&zone->free_are generinglya[order].free_list[t] ); 23 zone->free_are generinglya[order].nr_free =0; 24 } 25} 26#define for_every single_migrdined ontype_order(order. type) \ 27for (order =0; order < MAX_ORDER; order++) \ 28for (type =0; type < MIGRATE_TYPES; type++) 这段代码比设想中的好领略吧（也许我想错了）。sf土城花屏补丁。下面是初始化mem_map数组的代码（memmap_init）： 1#define memmap_init(size. nid. zone. stsculptures_pfn) \ 2 memmap_init_zone((size). (nid). (zone). (stsculptures_pfn). MEMMAP_EARLY) 3#endif 4void __meminit memmap_init_zone(unsigned long size. int nid. unsigned long zone. 5 unsigned long stsculptures_pfn. enum memmap_context context) 6{ 7struct page *page; 8 unsigned long end_pfn = stsculptures_pfn + size; 9 unsigned long pfn; 10struct zone *z; 11 12 z =&NODE_DATA(nid)->node_zones[zone]; 13/* 遍历每个page */ 14for (pfn = stsculptures_pfn; pfn < end_pfn; pfn++) { 15if (context == MEMMAP_EARLY) { 16if (!early_pfn_vingid(pfn)) 17continue; 18if (!early_pfn_in_nid(pfn. nid)) 19continue; 20 } 21/* 赢得pfn对应的page */ 22 page = pfn_to_page(pfn); 23/* 设置page->flags */ 24 set_page_links(page. zone. nid. pfn); 25/* 设置page->_count为1 */ 26 init_page_count(page); 27/* 设置page->_mapcount为-1 */ 28 reset_page_mapcount(page); 29/* 设置page为保存的 */ 30 SetPageReserved(page); 31/* 检讨一下能否能够设置为可挪动转移的 */ 32if ((z->zone_stsculptures_pfn <= pfn) 33&& (pfn < z->zone_stsculptures_pfn + z->spa majorned_page groups) 34&&!(pfn & (pageprohilittle bisexualt_nr_page groups -1))) 35 set_pageprohilittle bisexualt_migrdined ontype(page. MIGRATE_MOVABLE); 36 37 INIT_LIST_HEAD(&page->lru); 38#ifdef WANT_PAGE_VIRTUAL 39/* 借使不是高端页 */ 40if (!is_highmem_idx(zone)) 41 set_page_street getress(page. __va(pfn << PAGE_SHIFT)); 42#endif 43 } 44} 议定下面这几步就成立了mdined on system须要的数据布局。对于盟重土城补丁。热血传奇花屏补丁。下面就劈头用它来管理内存了。传奇盟重花屏补丁。下面是分配页面的代码：土城。 1staudio-videoailable atic inline struct page *the wholeoc_page groups_node(int nid. gfp_t gfp_mcingl. unsigned int order) 2{ 3/* 分配不了这么大的页 */ 4if (unlikely(order >= MAX_ORDER)) 5return NULL; 6/* 应当是借使没有决定从哪个节点分配就从现在的这个CPU对应的节点分配？？*/ 7if (nid <0) 8 nid = numa_node_id(); 9/* 真正的分配函数（火伴编制的心脏） */ 10return __the wholeoc_page groups(gfp_mcingl. order. NODE_DATA(nid)->node_zonelists + gfp_zone(gfp_mcingl)); 11} 12struct page* __the wholeoc_page groups(gfp_t gfp_mcingl. unsigned int order. struct zonelist *zonelist) 13{ 14const gfp_t wait = gfp_mcingl & __GFP_WAIT; 15struct zone **z; 16struct page *page; 17struct reclaudio-videoailable attempt_stdined on reclaudio-videoailable attempt_stdined on; 18struct tcingl_struct *p = current; 19int do_retry; 20int the wholeoc_flags; 21int did_some_progress; 22 23/* 自旋锁睡眠调试函数 */ 24 might_sleep_if(wait); 25/* 议定fail_page_the wholeoc和标志位敏捷决断能否会腐臭 */ 26if (should_fail_the wholeoc_page(gfp_mcingl. order)) 27return NULL; 28 29restsculptures: 30 z = zonelist->zones; 31if (unlikely(*z == NULL)) { 32return NULL; 33 } 34/* 用get_page_from_freelist函数去取page */ 35 page = get_page_from_freelist(gfp_mcingl|__GFP_HARDWALL. order. zonelist. ALLOC_WMARK_LOW|ALLOC_CPUSET); 36if (page) 37goto got_pg; 38/* 决断能否须要进一步努力 */ 39if (NUMA_BUILD && (gfp_mcingl & GFP_THISNODE) == GFP_THISNODE) 40goto nopage; 41/* 按序唤醒kswapd保卫进程来换页 */ 42for (z = zonelist->zones; *z; z++) 43 wakeup_kswapd(*z. order); 44 45/* 窜改标志位 */ 46 the wholeoc_flags = ALLOC_WMARK_MIN; 47if ((unlikely(rt_tcingl(p)) &&!in_interrupt()) ||!wait) 48 the wholeoc_flags |= ALLOC_HARDER; 49if (gfp_mcingl & __GFP_HIGH) 50 the wholeoc_flags |= ALLOC_HIGH; 51if (wait) 52 the wholeoc_flags |= ALLOC_CPUSET; 53/* 再次尝试 */ 54 page = get_page_from_freelist(gfp_mcingl. order. zonelist. the wholeoc_flags); 55if (page) 56goto got_pg; 57 58reair conditioning unitcount body mthaudio-videoailable ats indexkece: 59if (((p->flags & PF_MEMALLOC) || unlikely(test_threadvertising_flag(TIF_MEMDIE))) &&!in_interrupt()) { 60if (!(gfp_mcingl & __GFP_NOMEMALLOC)) { 61nofail_the wholeoc: 62/* 马虎水印再来一次 */ 63 page = get_page_from_freelist(gfp_mcingl. order. zonelist. ALLOC_NO_WATERMARKS); 64if (page) 65goto got_pg; 66/* 借使设置不能分配腐臭 */ 67if (gfp_mcingl & __GFP_NOFAIL) { 68 congestion_wait(WRITE. HZ/50); 69goto nofail_the wholeoc; 70 } 71 } 72goto nopage; 73 } 74 75if (!wait) 76goto nopage; 77/* 自动放任CPU提提供优先级更高的职分操纵 */ 78 cond_resched(); 79 80/* 劈头同步回收 */ 81 cpuset_memory_pressure_run(); 82 p->flags |= PF_MEMALLOC; 83 reclaudio-videoailable attempt_stdined on.reclin-line_slstomair conditioning unith =0; 84 p->reclaudio-videoailable attempt_stdined on =&reclaudio-videoailable attempt_stdined on; 85/* 尝试开释一些页 */ 86 did_some_progress = try_to_free_page groups(zonelist->zones. order. gfp_mcingl); 87 88 p->reclaudio-videoailable attempt_stdined on = NULL; 89 p->flags &=~PF_MEMALLOC; 90 91/* 自动放任CPU提提供优先级更高的职分操纵 */ 92 cond_resched(); 93/* 开释pcp中的页 */ 94if (order !=0) drain_the whole_page groups(); 95/* 借使开释了一些页就在此尝试 */ 96if (likely(did_some_progress)) { 97 page = get_page_from_freelist(gfp_mcingl. order. zonelist. the wholeoc_flags); 98if (page) 99goto got_pg; 100 } elseif ((gfp_mcingl & __GFP_FS) &&!(gfp_mcingl & __GFP_NORETRY)) { 101/* 想形式调用OOM killer（在内存不够用的时间拔取性地进去干掉一些进程） */ 102if (!try_set_zone_oom(zonelist)) { 103 schedule_timeout_uninterruptible(1); 104goto restsculptures; 105 } 106 page = get_page_from_freelist(gfp_mcingl|__GFP_HARDWALL. order. zonelist. ALLOC_WMARK_HIGH|ALLOC_CPUSET); 107if (page) { 108/* 清楚标志制止调用OOM killer */ 109 clear_zonelist_oom(zonelist); 110goto got_pg; 111 } 112/* 借使在分配一个很大的页分配不告捷也是很一般的 */ 113if (order > PAGE_ALLOC_COSTLY_ORDER) { 114/* 清楚标志制止调用OOM killer */ 115 clear_zonelist_oom(zonelist); 116goto nopage; 117 } 118/* 找出一个进程干掉（不然的话编制会挂掉吧） */ 119 out_of_memory(zonelist. gfp_mcingl. order); 120 clear_zonelist_oom(zonelist); 121goto restsculptures; 122 } 123 124 do_retry =0; 125if (!(gfp_mcingl & __GFP_NORETRY)) { 126if ((order <= PAGE_ALLOC_COSTLY_ORDER) || (gfp_mcingl & __GFP_REPEAT)) 127 do_retry =1; 128if (gfp_mcingl & __GFP_NOFAIL) 129 do_retry =1; 130 } 131/* 等候一些写操作完成的时间重试 */ 132if (do_retry) { 133 congestion_wait(WRITE. HZ/50); 134goto reair conditioning unitcount body mthaudio-videoailable ats indexkece; 135 } 136 137nopage: 138/* 招认此次分配腐臭 */ 139if (!(gfp_mcingl & __GFP_NOWARN) && printk_rdined onlimit()) { 140 printk(KERN_WARNING "%s: page percentage failure."" order:%d. mode:0x%x\n".p->m. order. gfp_mcingl); 141 dump_stair conditioning unitk(); 142 show_mem(); 143 } 144got_pg: 145return page; 146} 能够好好研讨这段代码，看看新浪土城花屏补丁。我们会发现内核在分配页面的时间真的全力了http://。热血传奇怎么去土城。先是尝试一下（大局部的分配这个时间会告捷），借使不行的话就劈头进程调理、"没收"其他场合占用的内存，盟重土城补丁下载。乃至不惜杀死进程。传奇。能够看出，补丁。借使没有内存了，我们找谁要？谁有就朝谁要（有点像《让子弹飞》内里的趣味了）。176土城花屏补丁。下面是从mdined on system中的确的分配页面的代码（很好领略，热血传奇装备补丁。但是细节对比多）： 1staudio-videoailable aticstruct page* get_page_from_freelist(gfp_t gfp_mcingl. unsigned int order. struct zonelist *zonelist. int the wholeoc_flags) 2{ 3struct zone **z; 4struct page *page = NULL; 5int clbumzone_idx = zone_idx(zonelist->zones[0]); 6struct zone *zone; 7 nodemcingl_t *permittednodes = NULL; 8int zlc_on the go =0; 9int did_zlc_setup =0; 10enum zone_type highest_zoneidx =-1; 11 12zonelist_sca major: 13 z = zonelist->zones; 14/* 遍历zonelist来找到一个有足够清闲页的zone */ 15do { 16/* 检讨标志看能否能在这个节点分配 */ 17if (unlikely(the wholeoc_should_filter_zonelist(zonelist))) { 18if (highest_zoneidx ==-1) 19 highest_zoneidx = gfp_zone(gfp_mcingl); 20if (zone_idx(*z) > highest_zoneidx) 21continue; 22 } 23 24if (NUMA_BUILD && zlc_on the go &&!zlc_zone_worth_trying(zonelist. z. permittednodes)) 25continue; 26 zone =*z; 27/* 检讨CPU限制 */ 28if ((the wholeoc_flags & ALLOC_CPUSET) && 29!cpuset_zone_permitted_softwthe whole(zone. gfp_mcingl)) 30goto try_next_zone; 31/* 检讨标志和限制 */ 32if (!(the wholeoc_flags & ALLOC_NO_WATERMARKS)) { 33 unsigned long mark; 34if (the wholeoc_flags & ALLOC_WMARK_MIN) 35 mark = zone->page groups_min; 36elseif (the wholeoc_flags & ALLOC_WMARK_LOW) 37 mark = zone->page groups_low; 38else 39 mark = zone->page groups_high; 40if (!zone_wdined onrmark_ok(zone. order. mark. clbumzone_idx. the wholeoc_flags)) { 41if (!zone_reclaudio-videoailable attempt_mode ||!zone_reclaudio-videoailable attempt(zone. gfp_mcingl. order)) 42goto this_zone_full; 43 } 44 } 45/* 正在的分配 */ 46 page = fridgeriered_rmqueue(zonelist. zone. order. gfp_mcingl); 47if (page) 48rupture; 49this_zone_full: 50/* 标志为满？？ */ 51if (NUMA_BUILD) 52 zlc_mark_zone_full(zonelist. z); 53try_next_zone: 54/* 设置缓存的标志 */ 55if (NUMA_BUILD &&!did_zlc_setup) { 56 permittednodes = zlc_setup(zonelist. the wholeoc_flags); 57 zlc_on the go =1; 58 did_zlc_setup =1; 59 } 60 } while (*(++z) != NULL); 61/* 禁用缓存再来一次，传奇进去花屏怎么办。网通传奇宣告不行就放任 */ 62if (unlikely(NUMA_BUILD && page == NULL && zlc_on the go)) { 63 zlc_on the go =0; 64goto zonelist_sca major; 65 } 66return page; 67} 68/* 在这里分红两种拔取，是从缓存中取还是从火伴编制中取？ */ 69staudio-videoailable aticstruct page *fridgeriered_rmqueue(struct zonelist *zonelist. struct zone *zone. int order. gfp_t gfp_flags) 70{ 71 unsigned long flags; 72struct page *page; 73int cold =!!(gfp_flags & __GFP_COLD); 74struct per_cpu_page groupset *pset; 75int migrdined ontype = the wholeocflags_to_migrdined ontype(gfp_flags); 76int this_cpu; 77thaudio-videoailable at soon: 78/* 取到per_cpu_page groupset */ 79 pset = get_zone_pcp(zone. &flags. &this_cpu); 80/* 借使分配单页，传奇盟重怎么去。传奇盟重补丁。这种景况占大多半 */ 81if (likely(order ==0)) { 82/* 赢得pcp */ 83struct per_cpu_page groups *pcp =&pset->pcp; 84/* 借使缓存上没有页 */ 85if (!pcp->count) { 86/* 分配group的页来填充缓存 */ 87 pcp->count = rmqueue_weight(zone. 0. pcp->group. &pcp->list. migrdined ontype); 88if (unlikely(!pcp->count)) 89goto failed; 90 } 91/* 遍历缓存分配 */ 92if (cold) { 93 list_for_every single_entry_reverse(page. &pcp->list. lru) 94if (page_privdined on(page) == migrdined ontype) 95rupture; 96 } else { 97 list_for_every single_entry(page. &pcp->list. lru) 98if (page_privdined on(page) == migrdined ontype) 99rupture; 100 } 101 102/* 借使须要的话分配更多的缓存 */ 103if (unlikely(&page->lru ==&pcp->list)) { 104 pcp->count += rmqueue_weight(zone. 0. pcp->group. &pcp->list. migrdined ontype); 105 page = list_entry(pcp->list.next. struct page. lru); 106 } 107 108 list_del(&page->lru); 109 pcp->count--; 110 } else { 111/* 借使不是单页就不能从缓存上分配了 */ 112 spin_lock(&zone->lock); 113 page = __rmqueue(zone. order. migrdined ontype); 114 spin_unlock(&zone->lock); 115if (!page) 116goto failed; 117 } 118 119 __count_zone_vm_events(PGALLOC. zone. 1<< order); 120/* 更新统计讯息? */ 121 zone_staudio-videoailable atistics(zonelist. zone); 122/* 开释锁? */ 123 put_zone_pcp(zone. flags. this_cpu); 124 125 VM_BUG_ON(flawed_ra majorge(zone. page)); 126if (prep_new_page(page. order. gfp_flags)) 127goto thaudio-videoailable at soon; 128return page; 129failed: 130 put_zone_pcp(zone. flags. this_cpu); 131return NULL; 132} 133/* 从火伴编制中remove一项 */ 134staudio-videoailable aticstruct page *__rmqueue(struct zone *zone. unsigned int order. int migrdined ontype) 135{ 136struct page *page; 137/* 拔取尽可能小的页移除 */ 138 page = __rmqueue_smthe wholeest(zone. order. migrdined ontype); 139/**/ 140if (unlikely(!page)) 141 page = __rmqueue_fthe wholebair conditioning unitk(zone. order. migrdined ontype); 142 143return page; 144} 145/* 拔取尽可能小的页移除 */ 146staudio-videoailable aticstruct page *__rmqueue_smthe wholeest(struct zone *zone. unsigned int order. int migrdined ontype) 147{ 148 unsigned int current_order; 149struct free_are generinglya * are generinglya; 150struct page *page; 151 152for (current_order = order; current_order < MAX_ORDER; ++current_order) { 153 are generinglya =&(zone->free_are generinglya[current_order]); 154/* 借使这个free_are generinglya是空的，那就间接去从更大的order内里找 */ 155if (list_empty(&are generinglya->free_list[migrdined ontype])) 156continue; 157/* 从free_are generinglya内里敷衍找一个删除 */ 158 page = list_entry(are generinglya->free_list[migrdined ontype].next. struct page. lru); 159 list_del(&page->lru); 160/* 排除mdined on标志并设置privdined on为0 */ 161 rmv_page_order(page); 162 are generinglya->nr_free--; 163/* 在不能停留的时间操纵 */ 164 __mod_zone_page_stdined on(zone. NR_FREE_PAGES. - (1UL<< order)); 165/* 瓦解页 */ 166 expthaudio-videoailable at well thaudio-videoailable at(zone. page. order. current_order. are generinglya. migrdined ontype); 167return page; 168 } 169return NULL; 170} 171/* 借使是一个大页，对比一下花屏。就把剩下的放回 */ 172staudio-videoailable atic inline void expthaudio-videoailable at well thaudio-videoailable at(struct zone *zone. struct page *page. int low. int high. struct free_are generinglya *are generinglya. int migrdined ontype) 173{ 174 unsigned long size =1<< high; 175 176while (high > low) { 177 are generinglya--; 178 high--; 179 size >>=1; 180 VM_BUG_ON(flawed_ra majorge(zone. &page[size])); 181/* 这个貌似是在尾部，其实是在在头部开刀，对比一下补丁。坑爹啊 */ 182 list_get(&page[size].lru. &are generinglya->free_list[migrdined ontype]); 183 are generinglya->nr_free++; 184 set_page_order(&page[size]. high); 185 } 186} 187/* 从fthe wholebair conditioning unitk list中找页（其实我看的也不是太懂，看着传奇土城药店花屏。是不是借使我想分配一种但是没有了，就从其他的类型中分配？） */ 188staudio-videoailable aticstruct page *__rmqueue_fthe wholebair conditioning unitk(struct zone *zone. int order. int stsculptures_migrdined ontype) 189{ 190struct free_are generinglya * are generinglya; 191int current_order; 192struct page *page; 193int migrdined ontype. i; 194/* 这次改用从大到小遍历，176土城花屏补丁。应当能更快找到清闲页？ */ 195for (current_order = MAX_ORDER-1; current_order >= order; --current_order) { 196/* 遍历完全类型 */ 197for (i =0; i < MIGRATE_TYPES -1; i++) { 198 migrdined ontype = fthe wholebair conditioning unitk[stsculptures_migrdined ontype][i]; 199if (migrdined ontype == MIGRATE_RESERVE) 200continue; 201 202 are generinglya =&(zone->free_are generinglya[current_order]); 203if (list_empty(&are generinglya->free_list[migrdined ontype])) 204continue; 205/* 下面的形式就差不多了 */ 206 page = list_entry(are generinglya->free_list[migrdined ontype].next. struct page. lru); 207 are generinglya->nr_free--; 208 209if (unlikely(current_order >= (pageprohilittle bisexualt_order >>1)) || stsculptures_migrdined ontype == MIGRATE_RECLAIMABLE) { 210 unsigned long page groups; 211 page groups = move_freepage groups_prohilittle bisexualt(zone. page. stsculptures_migrdined ontype); 212 213if (page groups >= (1<< (pageprohilittle bisexualt_order-1))) 214 set_pageprohilittle bisexualt_migrdined ontype(page. stsculptures_migrdined ontype); 215 216 migrdined ontype = stsculptures_migrdined ontype; 217 } 218 219 list_del(&page->lru); 220 rmv_page_order(page); 221 __mod_zone_page_stdined on(zone. NR_FREE_PAGES. -(1UL<< order)); 222 223if (current_order == pageprohilittle bisexualt_order) 224 set_pageprohilittle bisexualt_migrdined ontype(page. stsculptures_migrdined ontype); 225 226 expthaudio-videoailable at well thaudio-videoailable at(zone. page. order. current_order. are generinglya. migrdined ontype); 227return page; 228 } 229 } 230/* 实在不行就。土城花屏补丁。盟重。。*/ 231return __rmqueue_smthe wholeest(zone. order. MIGRATE_RESERVE); 232} 以前在看书的时间有个题目不奈何清楚，看看传奇装备花屏。在开释page的时间奈何知道它在freeare generinglya中的位置？完全的答案都在代码中：想知道传奇盟重花屏补丁。 1/* 开释页的进口 */ 2void __free_page groups(struct page *page. unsigned int order) 3{ 4if (put_page_testzero(page)) { 5if (order ==0) 6 free_hot_page(page); /* 借使是单页就放到页缓存中 */ 7else 8 __free_page groups_ok(page. order); /* 开释非单页 */ 9 } 10} 11void free_hot_page(struct page *page) 12{ 13 free_hot_cold_page(page. 0); 14} 15/* 开释"冷页"可能"惹页" */ 16staudio-videoailable aticvoid free_hot_cold_page(struct page *page. int cold) 17{ 18struct zone *zone = page_zone(page); 19struct per_cpu_page groupset *pset; 20struct per_cpu_page groups *pcp; 21 unsigned long flags; 22int this_cpu; 23/* 检讨是不是匿名页？ 没有映照过的？ */ 24if (PageAnon(page)) 25 page->miphone apping = NULL; 26/* 检讨标志位 */ 27if (free_page groups_check(page)) 28return; 29/* 借使是highmem */ 30if (!PageHighMem(page)) 31 debother_check_no_locks_freed(page_street getress(page). PAGE_SIZE); 32 posture_free_page(page. 0); 33 kernel_map_page groups(page. 1. 0); 34 35/* 赢得pcp */ 36 pset = get_zone_pcp(zone. &flags. &this_cpu); 37 pcp =&pset->pcp; 38 39 count_vm_event(PGFREE); 40 41if (cold) 42 list_get_tail(&page->lru. &pcp->list); 43else 44 list_get(&page->lru. &pcp->list); 45 set_page_privdined on(page. get_pageprohilittle bisexualt_migrdined ontype(page)); 46 pcp->count++; 47/* 借使仍然越过阀值，那么就开释group个页到火伴编制 */ 48if (pcp->count >= pcp->high) { 49 free_page groups_weight(zone. pcp->group. &pcp->list. 0); 50 pcp->count -= pcp->group; 51 } 52/* 开释锁? */ 53 put_zone_pcp(zone. flags. this_cpu); 54} 55staudio-videoailable aticvoid __free_page groups_ok(struct page *page. unsigned int order) 56{ 57 unsigned long flags; 58int reserved =0; 59int this_cpu; 60int i; 61/* 检讨标志位 */ 62for (i =0 ; i < (1<< order) ; ++i) 63 reserved += free_page groups_check(page + i); 64if (reserved) 65return; 66if (!PageHighMem(page)) 67 debother_check_no_locks_freed(page_street getress(page).PAGE _SIZE<<order); 68 posture_free_page(page. order); 69 kernel_map_page groups(page. 1<< order. 0); 70 71 lock_cpu_pcp(&flags. &this_cpu); 72 count_vm_events(PGFREE. 1<< order); 73/* 开释页 */ 74 free_one_page(page_zone(page). page. order); 75 unlock_cpu_pcp(flags. this_cpu); 76} 77staudio-videoailable aticvoid free_one_page(struct zone *zone. struct page *page. int order) 78{ 79 spin_lock(&zone->lock); 80 zone_clear_flag(zone. ZONE_ALL_UNRECLAIMABLE); 81 zone->page groups_sca majorned =0; 82 __free_one_page(page. zone. order); 83 spin_unlock(&zone->lock); 84} 85/* 答案就在这里 */ 86staudio-videoailable atic inline void __free_one_page(struct page *page. struct zone *zone. unsigned int order) 87{ 88 unsigned long page_idx; 89int order_size =1<< order; 90/* 赢得type */ 91int migrdined ontype = get_pageprohilittle bisexualt_migrdined ontype(page); 92/* 借使是复合页 */ 93if (unlikely(PageCompound(page))) 94 destroy_pound_page(page. order); 95 96 page_idx = page_to_pfn(page) & ((1<< MAX_ORDER) -1); 97 98 VM_BUG_ON(page_idx & (order_size -1)); 99 VM_BUG_ON(flawed_ra majorge(zone. page)); 100 101 __mod_zone_page_stdined on(zone. NR_FREE_PAGES. order_size); 102/* 从小到大遍历 */ 103while (order < MAX_ORDER-1) { 104 unsigned long rubbisexualsh bisexualned_idx; 105struct page *mdined on; 106/* 找到火伴（只是找到位置） */ 107 mdined on = __page_find_mdined on(page. page_idx. order); 108/* 决断是不是火伴 */ 109if (!page_is_mdined on(page. mdined on. order)) 110rupture; 111/* 把mdined on从所在的链表中删除 */ 112 list_del(&mdined on->lru); 113 zone->free_are generinglya[order].nr_free--; 114/* 窜改标志位 */ 115 rmv_page_order(mdined on); 116/* 找到归并后的位置 */ 117 rubbisexualsh bisexualned_idx = __find_rubbisexualsh bisexualned_index(page_idx. order); 118 page = page + (rubbisexualsh bisexualned_idx - page_idx); 119 page_idx = rubbisexualsh bisexualned_idx; 120 order++; 121 } 122/* 末了设置page */ 123 set_page_order(page. order); 124 list_get(&page->lru. &zone->free_are generinglya[order].free_list[migrdined ontype]); 125 zone->free_are generinglya[order].nr_free++; 126} 127staudio-videoailable atic inline struct page * __page_find_mdined on(struct page *page. unsigned long page_idx. unsigned int order) 128{ 129/* 找到火伴（这个领略起来还是很纯洁的） */ 130 unsigned long mdined on_idx = page_idx ^ (1<< order); 131return page + (mdined on_idx - page_idx); 132} 这里的代码都很好领略，看的进程也都做了解释。先是定下计谋，奈何找？找不到奈何办？然后找的时间检讨标志，看能否用缓存。末了就是找的进程了。看的匆忙，难免有错的场合。 ---------------------------- 小我领略，接待拍砖。 2011好彩头弹爱情杯QQ炫舞祸建争霸赛本周浪漫开赛 (转载)电脑没有能一样通常发动的措置格式 1.85星王开击传?**抻锇?流落汉与妙龄好男街头热情挨近 (责任编辑：admin) |
