Re: [RFC] Ext3 online defrag

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Alex Tomas wrote:
3) scalable reservation
   required for delayed allocation to avoid -ENOSPC at flush time.
   current version uses per-sb spinlock.

Can you elaborate on this issue? Shouldn't delayed allocation decrement free space immediately, and only the actual block location choice is delayed? Or is this due to potential extra metadata space required as blocks are allocated?

Thanks,

-Eric
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