[LU-9986] Cannot write to ldiskfs prealloc_table proc file Created: 13/Sep/17 Updated: 25/Dec/17 Resolved: 25/Dec/17 |
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| Status: | Closed |
| Project: | Lustre |
| Component/s: | None |
| Affects Version/s: | Lustre 2.10.0 |
| Fix Version/s: | Lustre 2.11.0 |
| Type: | Bug | Priority: | Minor |
| Reporter: | Ian Ziemba | Assignee: | Yang Sheng |
| Resolution: | Duplicate | Votes: | 0 |
| Labels: | None | ||
| Environment: |
RHEL7, SLES12 |
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| Severity: | 3 |
| Rank (Obsolete): | 9223372036854775807 |
| Description |
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For Lustre servers using ldiskfs, the prealloc_table cannot be updated through the proc file. # echo 1024 2048 4096 > /proc/fs/ldiskfs/md0/prealloc_table -bash: echo: write error: Invalid argument # ls -l /proc/fs/ldiskfs/md0/prealloc_table -rw-r--r-- 1 root root 0 Sep 13 04:42 /proc/fs/ldiskfs/md0/prealloc_table The issue appears to be caused by the usage of kstrtol in ldiskfs_mb_prealloc_table_proc_write. Unlike simple_strtol, kstrtol does not provide an end pointer. This causes -EINVAL to be returned due to the cur pointer not getting updated. |
| Comments |
| Comment by Peter Jones [ 21/Dec/17 ] |
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Yang Sheng Can you please look into this one? Thanks Petery |
| Comment by Yang Sheng [ 25/Dec/17 ] |
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Duplicated with |