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I have made myself a bootable USB Debian 7 thumbdrive, using debootstrap. It boots nicely - but occasionally freezes for a bit. I can see the load average is much higher than the running tasks should indicate. I wonder if maybe the default ext4 mounting paramaters don't work well in this scenario. Are there things I can change (even at the risk of data loss?) to make it run faster.

I am assuming I could add something to rootflags in the kernel boot params in GRUB2. What flags could I use?

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closed as primarily opinion-based by Gilles, slm, jasonwryan, strugee, Anthon Apr 18 at 6:23

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise.If this question can be reworded to fit the rules in the help center, please edit the question.

    
I don't see how the mounting parameters — or the filesystem creation flags, for that matter — are related to a high load average. During boot, it's normal to have a high load average: all those services are starting up. Do you still have a high load average when the system should be quiescent? When the system freezes, is there disk I/O, and from what processes? –  Gilles Apr 17 at 23:40
    
noatime or diratime may improve disk performance. other than that, I don't know. –  strugee Apr 18 at 3:40