[fedora-arm] [Fwd: discard support in e2fsprogs and dm]

[Jon Masters]

On Fri, 2011-10-21 at 01:20 -0400, Jon Masters wrote:

> In case anyone is interested, I have Fedora running on the AC100U now.
> Unlike some of the other hacks I've seen I wanted to actually use the
> storage efficiently with device mapper presenting it as a contig. block
> device. Unfortunately, some of the block discard support seems to be
> tripping that up. If you try an AC100 with dm, make sure you specify "-E
> nodiscard" to mkfs.ext4 during filesystem creation.

Separately note that the F15 man page for e2fsprogs says both that
"discard" and "nodiscard" are simultaneously the default :) This was
confusing me. However, the correct default (as also documented in
rawhide) is that discard will generally be attempted.

Jon.