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- Where: /dev/pstore/...
- Date: January 2011
- Kernel Version: 2.6.38
- Contact: tony.luck@intel.com
- Description: Generic interface to platform dependent persistent storage.
- Platforms that provide a mechanism to preserve some data
- across system reboots can register with this driver to
- provide a generic interface to show records captured in
- the dying moments. In the case of a panic the last part
- of the console log is captured, but other interesting
- data can also be saved.
- # mount -t pstore - /dev/pstore
- $ ls -l /dev/pstore
- total 0
- -r--r--r-- 1 root root 7896 Nov 30 15:38 dmesg-erst-1
- Different users of this interface will result in different
- filename prefixes. Currently two are defined:
- "dmesg" - saved console log
- "mce" - architecture dependent data from fatal h/w error
- Once the information in a file has been read, removing
- the file will signal to the underlying persistent storage
- device that it can reclaim the space for later re-use.
- $ rm /dev/pstore/dmesg-erst-1
- The expectation is that all files in /dev/pstore
- will be saved elsewhere and erased from persistent store
- soon after boot to free up space ready for the next
- catastrophe.
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