[LU-2565] reduce ldiskfs inode size

• Type: Improvement
• Resolution: Low Priority
• Priority: Minor
• Affects Version/s: Lustre 2.5.0, Lustre 2.8.0
• Labels: easy
• Assignee: WC Triage
• Reporter: Andreas Dilger

Description

I noticed on the server that the ldiskfs_inode_cache is just over 1kB in size (1048 bytes on 2.7.56), which means only 3 inodes can fit into a 4kB page. It would be useful to reduce the inode size to be <= 1024 bytes in order to improve the memory efficiency by 1/3.

Issue Links

• is related to: LU-1548 Test failure on test suite mds-survey, subtest test_1