Andrew Morton <andrewm@xxxxxxxxxx> wrote:
> Juri Haberland wrote:
>> thomas graichen <list-linux.sgi.xfs@xxxxxxxxxxx> wrote:
>> > just out of curiousity: how does xfs interact with things like
>> > noflushd which reduce the disk flushing for more effective ide
>> > poweroff possibilities ... is the flushing below the fs layer
>> > so that it should all work transparently or may it result in
>> > problems with xfs (or journaling fs in general)?
>> Hi Thomas,
>> well, I cannot speak for xfs but with ext3 the disk will only spin
>> down once; after this it will be constantly restarted by the update
>> mechanisms of ext3 (commit interval is 5 seconds).
> ext3's commit only runs if there is dirty data to be committed.
Well, on an idle machine I can see disk access every five seconds. This
does not happen with ext2.
> Running ext3 with a kupdate interval of 15 minutes lets the disks
> spin down nicely.
Is that safe? Anyway, I will give it a try.
Juri Haberland <juri@xxxxxxxxxxxxxx>