Messages in this thread | | | Date | Sun, 6 Feb 2000 11:37:27 +1100 | From | Peter Moulder <> | Subject | ext2 compression status (was Re: 2.4 Features |
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On Fri, Feb 04, 2000 at 11:56:25PM +0000, Stephen C. Tweedie wrote:
> On Fri, 4 Feb 2000 20:14:08 +0000 (GMT), Riley Williams > <rhw@MemAlpha.CX> said: > > > Q. Is there any likelihood of the e2fs-compressed patch (or anything > > similar) making its way into the standard kernel any time soon? > > Probably it is too late for 2.4.0, but beyond that the answer is yes > only if somebody takes on the job of getting it in shape: is e2compr > still being maintained,
I'm the current maintainer of e2compr. I continue to work on it, but I've announced my desire that someone else take on `maintainer' title, as for quite some time I've been busy with other things.
> and is there a robust 2.3 version?
Nope. The change to Linux' write mechanism in early 2.3 (namely having writes go through writepage instead of having ext2_file_write create disk buffers) means that there's no longer a convenient place to do the compression (in the most common case, where we wish to compress more than a page full at a time). Probably the fix is to organise for multiple pages to be written at once. It just requires that someone spend a chunk of time getting familiar with how pages usually get written out, and the locking issues and so on. Stephen, since you're already familiar with both the mm system and ext2, can you comment on that plan?
Thanks,
pjm.
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