Messages in this thread | | | Date | Fri, 26 Dec 2008 22:15:44 +0100 (CET) | From | Jan Engelhardt <> | Subject | Re: [PATCH] Compress kernel modules on installation |
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On Friday 2008-12-26 23:02, david@lang.hm wrote: >> ( see >> http://www.linuxjournal.com/files/linuxjournal.com/linuxjournal/articles/080/8051/8051f1.png >> ) > > this varies a lot on the particulars of the data being compressed.
see my other reply.
> however, I do need to ask what the sizes of the resulting files end up being > (on my system the last kernel that used modules was 2.4.31, so I can't just > look this up myself). in most cases disks are formatted with 4K blocks, so > unless it shrinks across such a boundry it's not actually going to help much.
Hey, don't forget exotic filesystems that pack that together anyway. And if I fired up du right, then...
$ find . -iname "*.gz" | xargs du -cs -B 4096 | grep total 7086 total $ echo $[7086*4096] 29024256 $ echo $[29024256-24782942] 4241314
So that's like 4M going off for the block stuff. Given that the compression actually saved about 50 MB, I think we can live with the 4M - especially since they have been there already one way or another.
> one other thing to consider would be some ability to load the > module out of a tar or cpio bundle, that way you end up saving all > the partial blocks from each module as well.
tarfs, it's somewhere around the corner on the fuse pages probably.
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