Re: hfs support for blocksize != 512

From: Alexander Viro (
Date: Tue Aug 29 2000 - 13:33:39 EST

On Tue, 29 Aug 2000, Roman Zippel wrote:

> hfs. For example reading from a file might require a read from a btree
> file (extent file), with what another file write can be busy with (e.g.
> reordering the btree nodes).


> I really would prefer that a fs could sleep _and_ can use semaphores,
> that would keep locking simple, otherwise it gets only a fscking mess.

WTF? HFS does not allow holes. _ALL_ allocations there are process
synchronous. What's the problem? Pageout on HFS can not allocate blocks
and that's the only process-async method. If you want to sleep at
completely arbitrary moments while you are modifying the btree (i.e.
in the moments when it's in the inconsistent state and hfs_get_block()
would fail) - too bad, you are going to have problems. And not from me -
power failure will take care of making your life _very_ painful.

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