> As you are adding new sysfs files, you are required to document them in > Documentation/ABI/ as well. Is this what you need? -Tony --- diff --git a/Documentation/ABI/testing/sysfs-pstore b/Documentation/ABI/testing/sysfs-pstore new file mode 100644 index 0000000..083fcf7 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-pstore @@ -0,0 +1,35 @@ +Where: /sys/firmware/pstore/... +Date: January 2011 +Kernel Version: 2.6.38 +Contact: tony.luck@xxxxxxxxx +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. + + $ ls -l /sys/firmware/pstore + total 0 + -r--r--r-- 1 root root 7896 Nov 30 15:38 dmesg-1 + --w------- 1 root root 0 Nov 30 15:38 erase + + 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 + + The "erase" file is used to signal that a file has been + read and that the underlying platform driver can reclaim + the space in the persistent store. Just write the name of + the file to be removed to the "erase" file: + + $ echo dmesg-1 > /sys/firmware/pstore/erase + + The expectation is that all files in /sys/firmware/pstore + will be saved elsewhere and erased from persistent store + soon after boot to free up space ready for the next + catastrophe. -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
