Re: [PATCH v17 0/3] Improve proc RSS accuracy
From: Heiko Carstens <hca@linux.ibm.com>
Date: 2026-02-27 15:14:38
Also in:
linux-mm, linux-s390, lkml
On Fri, Feb 27, 2026 at 08:25:46AM -0500, Mathieu Desnoyers wrote:
On 2026-02-27 08:11, Heiko Carstens wrote:quoted
This seems to happen because the return value of get_rss_stat_items_size() is larger than PERCPU_COUNTER_TREE_ITEMS_STATIC_SIZE: PERCPU_COUNTER_TREE_ITEMS_STATIC_SIZE: 18688 get_rss_stat_items_size(): 21504
...
Which fails to account for NR_MM_COUNTERS. Does the following fix your issue ?
#define MM_STRUCT_FLEXIBLE_ARRAY_INIT \
{ \
[0 ... (PERCPU_COUNTER_TREE_ITEMS_STATIC_SIZE * NR_MM_COUNTERS) + sizeof(cpumask_t) + MM_CID_STATIC_SIZE - 1] = 0 \
}Yes, this works.