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Re: dmcrypt on an existing partition (firewire external disk)



Andrew Sackville-West wrote:

> nice guide. it was definitely part of my list of open tabs when I was
> setting up my encrypted laptop. He's got some other good ones there as
> well. 
>
> A
>   
Somethings broken :(

I followed the guide to the letter, and it all seemed to work
wonderfully.  Then the pain began when I started to move my files back
to the encrypted volume.  What a performance killer!  It's eating 90%
CPU and it takes *forever*, because it keeps 'hanging'.  If I switch
focus to another window, then kcryptd/0 and kjournald stop working (they
are the processes taking 90%).  If I shut laptop lid (set to blank
screen) then they stop working.  If the screensaver activates, then they
stop working.  When they stop (zero percent CPU) then the disk activity
stops as well.

When I run scp from a ethernet attached laptop then scp says:

ubuntu-7.10-alternate-amd64.iso               86%  684MB   2.9MB/s  
-stalled-

and as you can see by the transfer rate, it is nowhere near the 11MB/s I
was getting consistently before encrypting.

Is this normal write performance?  Can the "terminal loses focus: copy
suspends" behaviour be fixed?  I have not tested read performance yet,
but I expect and hope that it will be more normal.

--andrew


-- 
GnuPG Key ID: ECB18ABA
Fingerprint:  FDF3 91FC F5BC 1164 E217  315E 337E 219B ECB1 8ABA





-- 
GnuPG Key ID: ECB18ABA
Fingerprint:  FDF3 91FC F5BC 1164 E217  315E 337E 219B ECB1 8ABA


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