Re: [PATCH] mm: Add missed mem_cgroup_iter_break() into shrink_node_memcgs()

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On 11.02.2020 14:46, Vasily Averin wrote:
> On 2/11/20 2:38 PM, Kirill Tkhai wrote:
>> Leaving mem_cgroup_iter() loop requires mem_cgroup_iter_break().
>>
>> Fixes: bf8d5d52ffe8 "memcg: introduce memory.min"
>> Signed-off-by: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
>> ---
>>  mm/vmscan.c |    3 ++-
>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/mm/vmscan.c b/mm/vmscan.c
>> index b1863de475fb..f6efe2348ba3 100644
>> --- a/mm/vmscan.c
>> +++ b/mm/vmscan.c
>> @@ -2653,8 +2653,9 @@ static void shrink_node_memcgs(pg_data_t *pgdat, struct scan_control *sc)
>>  				continue;
>>  			}
>>  			memcg_memory_event(memcg, MEMCG_LOW);
>> -			break;
> 
> It is not cycle break, it is switch/case break.

Oh, I missed this, thanks.
 
>> +			/* fallthrough */
>>  		case MEMCG_PROT_NONE:
>> +			mem_cgroup_iter_break(target_memcg, memcg);
>>  			/*
>>  			 * All protection thresholds breached. We may
>>  			 * still choose to vary the scan pressure
>>
>>





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