[LU-5888] mount.lustre: set max_sectors_kb to 2147483647

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.8.0
• Affects Version/s: Lustre 2.7.0
• Labels: mq115
• Severity: 3
• Assignee: Dmitry Eremin (Inactive)
• Reporter: Maloo

Description

This issue was created by maloo for Andreas Dilger <[e-mail]>

I noticed that the automatic tuning of max_sectors_kb by mount.lustre is going badly at mount time:

mount.lustre: set /sys/block/dm-0/queue/max_sectors_kb to 2147483647

This looks like and overflow, but even if it is not then we don't need to set this higher than PTLRPC_MAX_BRW_SIZE, or maybe 16MB or 32MB if that #define is not available in userspace.

This issue relates to the following test suite run: https://testing.hpdd.intel.com/test_sets/169fa0cc-6627-11e4-8c86-5254006e85c2.

Issue Links

• is related to: LU-6974 RHEL 7.1 lustre-initialization-1: MDS crashed while lustre mount
• is related to: LU-4810 Mount command unexpectedly sets block device parameter "max_sectors_kb"