21 May
2021
21 May
'21
4:43 a.m.
On Wed, Apr 28, 2021 at 10:19:28PM +0000, Alexey Makhalov wrote:
I've recently discovered that doing infinite loop of systemctl start <ext4_on_lvm>.mount, and systemctl stop <ext4_on_lvm>.mount linearly increases percpu allocator memory consumption. In several hours, it might lead to system instability by consuming most of the memory.
Bug is not reproducible when the ext4 filesystem is on physical partition, but it is persistent when ext4 is on logical volume.
Why is this the case? It sounds like we're looking a buffer for each mount where the block size is not 1k. It shouldn't matter whether it is a physical partition or not.
- Ted