This issue was created by maloo for stancheff <stancheff@cray.com>

This issue relates to the following test suite run: https://testing.whamcloud.com/test_sets/f29d1253-66c3-4e9a-9cae-035055e32908

Test session details:
clients: https://build.whamcloud.com/job/lustre-reviews/125708 - 5.14.0-503.40.1.el9_5.aarch64+64k
servers: https://build.whamcloud.com/job/lustre-reviews/125708 - 4.18.0-553.117.1.el8_lustre.x86_64

Issue was introduced in patch https://review.whamcloud.com/64351 ("LU-19536 llite: drain and retry on DIO pool ENOMEM") that just landed on 2026-05-28 and added test_398u.

Test should use PAGE_SIZE instead of 4096