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freeing free inode/frag/block Panic on / After Issuing the lufslist Command (Doc ID 1329401.1)

Last updated on JUNE 22, 2020

Applies to:

Solaris Operating System - Version 8.0 to 10 1/13 U11 [Release 8.0 to 10.0]
Information in this document applies to any platform.
***** 02-Dec-2018 Checked for currency from kernel point of view *****


You may see a panic with the panic string similar to this.

Jun  7 13:11:52 host ^Mpanic[cpu13]/thread=30007f66720:
Jun  7 13:11:52 host unix: [ID 198239 kern.notice] free: freeing free block, dev:0x2000000008, block:39392, ino:2, fs:/.alt.tmp.b-wB.mnt

This means UFS freeing free block panic happened on "/.alt.tmp.b-wB.mnt".

The scope of this document is to explain and prevent future similar freeing free panics, when the affected file system name starts with "/.alt.tmp".  "/.alt.tmp" means the filesystem is a boot environment of Live Upgrade.

It does not explain any other ufs related panic, when the file system name does not match the above pattern.


Sometimes before the panic, a live upgrade was performed by :


The proper way is to delete the old boot environment using ludelete before the device is re-mirrored.



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