The trouble with stable pages

Posted Mar 15, 2012 13:06 UTC (Thu) by Spudd86 (subscriber, #51683)
In reply to: The trouble with stable pages by intgr
Parent article: The trouble with stable pages

The feature isn't obscure... it's a correctness feature in btrfs, and hardware support elsewhere.

Basically btrfs needs to know that the checksum is right because it will check the checksum when the page is read from disk next, so if it can't do that it WILL report spurious errors and potentially loose data depending on how your app or you react.

The trouble with stable pages

Posted Mar 15, 2012 14:00 UTC (Thu) by intgr (subscriber, #39733) [Link]

> The feature isn't obscure...

Well btrfs users had to deal with this from day one there's no regression there.

But most users are using ext3/4, and most of them certainly aren't using compression or hardware block checksums -- hence obscure.