On Jan 10, 2008 09:58 +0530, Aneesh Kumar K.V wrote:
> > d) if s_stripe is still > s_blocks_per_group try s_raid_stride
> > e) if s_stripe is still > s_blocks_per_group use 0
>
> But i guess mke2fs and tune2fs should validate the value of
> s_raid_stripe_width and s_raid_stride. Both of them should be less that
> blocks per group. Should I add extra check in the kernel for them ?
It's true that mke2fs and tune2fs should validate this, but it is also
possible to become corrupted, and e2fsck doesn't fix it yet nor can it
make a good estimate of the right value.
> > > + if (!sbi->s_stripe ||
> > > + sbi->s_stripe >= sbi->s_blocks_per_group) {
> >
>
> So what do you think should it be > or >=. Looking at the mballoc I
> guess it should work with stripe size equal to blocks per group. I am
> not sure how efficient the allocation would be though.
I think if s_stripe == s_blocks_per_group that is fine... For 1kB block
filesystem that is only 8MB in size.
Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.
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