slab_unreclaimable是指在Linux内存管理中由slab分配器分配的且被标记为不可回收(unreclaimable)的内存。当不可回收内存占用总内存的比例过高时,将会影响可用内存与系统性能。本文介绍如何排查Alibaba Cloud Linux系统slab_unreclaimable内存占用高的原因。 问题现象 在Linux实例内运行cat /proc/meminfo | grep "SUnreclaim...
无法部署其他服务。 lab_unreclaimable内存为系统不可回收的内存,当其占用总内存的比例过高时,将会影响可用内存与系统性能。本文介绍如何排查Linux slab_unreclaimable内存占用高的原因。 问题现象 在Linux实例内运行cat /proc/meminfo | grep "SUnreclaim"命令查看SUnreclaim参数指标时,发现内存较大(例如SUnreclaim: 606934...
Each time the mount is attempted thesunrpcmodule createssvc_rqstdata structures in unreclaimable slab memory for the v4.2, v4.1, and v4.0 attempts, but the structures are not released until umounting. As a result the failed v4.2 and v4.1 attempts never release theirsvc_rqststructures becaus...
*/ unsigned long pages_scanned; /* since last reclaim */ /** * 在管理区中填满不可回收页时此标志被置位 */ int all_unreclaimable; /* All pages pinned */ /* * prev_priority holds the scanning priority for this zone. It is * defined as the scanning priority at which we achieved ...
NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE, -pages); /* 清除page的标志位 */ __ClearPageSlabPfmemalloc(page); __ClearPageSlab(page); /* 设置page->_mapcount = -1 */ page_mapcount_reset(page); if (current->reclaim_state) current->reclaim_state->reclaimed_slab += pages; /* 通过...
* 在管理区中填满不可回收页时此标志被置位*/intall_unreclaimable;/*All pages pinned*//** prev_priority holds the scanning priority for this zone. It is * defined as the scanning priority at which we achieved our reclaim * target at the previous try_to_free_pages() or balance_pgdat() ...
/* scanned but unreclaimable */ continue; default: /* did we reclaim enough */ if (zone_watermark_ok(zone, order, mark, ac->highest_zoneidx, alloc_flags)) goto try_this_zone; continue; } } try_this_zone: page = rmqueue(ac->preferred_zoneref->zone, zone, order, ...
NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE, 1 << oo_order(oo)); return page; } 函数alloc_slab_page()便是Slub分配器与伙伴系统的接口! static inline struct page *alloc_slab_page(gfp_t flags, int node, struct kmem_cache_order_objects oo) ...
shmem:1648kB slab_reclaimable:1324384kB slab_unreclaimable:1154192kB kernel_stack:17904kB pagetables:2156kB unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no Nov 12 15:15:41 kernel: lowmem_reserve[]: 0 0 13053 13053...
all_unreclaimable: 0 start_pfn: 262144 inactive_ratio: 1 Zone的管理调度的一些参数: (Zone watermarks), 英文直译为zone的水平,打个比喻,就像一个水库,水存量很小的时候加大进水量,水存量达到一个标准的时候,减小进水量,当快要满的时候,可能就关闭了进水口。pages_min, pages_low and pages_high就类似与这...