Re: blktrace & btrace usability

[Linda Walsh <lkml@tlinx.org>]

Jan Blunck wrote:
> blktrace is used by the preload package. The preload package is capable of
> remapping blocks for faster booting. Therefore we need the blktrace
> output. But we only have a remapper for ext3.
>   
----
    I wondered about that, but the blktrace package doesn't containg
any utility for remapping blocks. The blktrace-0.99.3-12 package
included in OSuse-10.3, I only see utilities "blkparse, blktrace, btrace,
blkrawverify, btt, and verify_blktrace". 

    Was it left out by accident?  ---or---

    If the remapping is in a separate package, then shouldn't
the blktrace package "just" do the block tracing, regardless
of file type (i.e. in typical unix fashion, it does its part, and
another util (a block-re-arranger) does its part...? 

    Having blktrace do it's thing no matter what filesystem
follows might encourage or enable someone to write re-arrangers
for other filesystems...(?)  After all, xfs already has
one block-rearranger program (for what little it is needed)
in "xfs_fsr".  Does ext3 have something similar now? 

    Was the ext3 block re-arranging tool supposed to be
in the blktrace package? 

thanks,
linda