https://bugzilla.kernel.org/show_bug.cgi?id=42723 --- Comment #19 from Theodore Tso <tytso@xxxxxxx> --- The EXT4-fs error reported by "ext4_mb_generate_buddy" simply means that there is an inconsistency between the block allocation bitmap and the number of free blocks reported in a particular block group descriptor. An e2fsck should fix this. There are some people who are reporting that it is showing up more frequently in 3.15, but the problem is there can be multiple causes of this inconsistency. It can be caused by a hardware problem; it can be caused by flash devices that don't handle power failures gracefully; etc, etc. If you can reliably reproduce it, and it doesn't reliably reproduce on an older kernel, then it becomes interesting. As far as "error count" message, this simply means that an EXT4-fs error has been reported since the last time the file system was checked using e2fsck. It will be displayed once every 24 hours, so that system administrators hopefully get the hinit and get their file system repaired before they lose catastrophic amounts of data. The format is confusing, and we will be trying to make the error messages more clear. In particular "initial error at 1404174299" will probably need to get changed to something like "first error since e2fsck happened at time 1404174299", which is the number of seconds since January 1, 1970 --- since the kernel doesn't have time zone information. You can convert that into a human readable time stamp as follows: % date -d @1404174299 Mon Jun 30 20:24:59 EDT 2014 The "error count" message will get cleared by e2fsck, so long as you are using a version of e2fsck newer than 1.41.13, released in December 2010. People who upgrade their kernels without upgrading e2fsck can get into a situation where they continuously get the error count message even though they have gotten their file system checked. But if you are using that ancient version of e2fsprogs, you **really** want to upgrade to a newer version, just because of the huge number of bugs fixed in the last 3.5 years. -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
