On 8/25/22 11:59, Michal Hocko wrote: > On Thu 25-08-22 11:52:09, Vlastimil Babka wrote: >> On 8/23/22 11:22, Michal Hocko wrote: >> > All but node0 are really completely irrelevant for this allocation >> > because they do not have ZONE_DMA yet it swamps the log and makes it >> > harder to visually inspect. >> > >> > Address this by providing gfp_maks parameter to show_mem and filter the >> > output to only those zones/nodes which are relevant for the allocation. >> > That means nodes which have at least one managed zone which is usable >> > for the allocation (zone_idx(zone) <= gfp_zone(gfp_mask)). >> > The resulting output for the same failure would become: >> >> Looks good to me. >> >> > [...] >> > [ 14.017605][ T1] Mem-Info: >> >> Maybe print the gfp_mask (or just max zone) here again, to make it more >> obvious in case somebody sents a report without the top header? > > I have tried to not alter the output but rather filter it out. The gfp > mask is the first line of the allocation failure and from my past > experience it is usually included in reports. OK >> > [ 14.017956][ T1] active_anon:0 inactive_anon:0 isolated_anon:0 >> > [ 14.017956][ T1] active_file:0 inactive_file:0 isolated_file:0 >> > [ 14.017956][ T1] unevictable:0 dirty:0 writeback:0 >> > [ 14.017956][ T1] slab_reclaimable:876 slab_unreclaimable:30300 >> > [ 14.017956][ T1] mapped:0 shmem:0 pagetables:12 bounce:0 >> > [ 14.017956][ T1] free:3170151735 free_pcp:6868 free_cma:0 >> > [ 14.017962][ T1] Node 0 active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:0kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB kernel_stack:7200kB pagetables:4kB all_unreclaimable? no >> > [ 14.018026][ T1] Node 0 DMA free:160kB boost:0kB min:0kB low:0kB high:0kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15996kB managed:15360kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB >> > [ 14.018035][ T1] lowmem_reserve[]: 0 0 0 0 0 >> > [ 14.018339][ T1] Node 0 DMA: 0*4kB 0*8kB 0*16kB 1*32kB (U) 0*64kB 1*128kB (U) 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 160kB >> > [ 14.018480][ T1] 0 total pagecache pages >> > [ 14.018483][ T1] 0 pages in swap cache >> > [ 14.018484][ T1] Swap cache stats: add 0, delete 0, find 0/0 >> > [ 14.018486][ T1] Free swap = 0kB >> > [ 14.018487][ T1] Total swap = 0kB >> > [ 14.018488][ T1] 3221164600 pages RAM >> > [ 14.018489][ T1] 0 pages HighMem/MovableOnly >> > [ 14.018490][ T1] 50531051 pages reserved >> > [ 14.018491][ T1] 0 pages cma reserved >> > [ 14.018492][ T1] 0 pages hwpoisoned >> > >> > Signed-off-by: Michal Hocko <mhocko@xxxxxxxx> Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
