Messages in this thread |  | | From | "H. Peter Anvin" <> | Subject | Re: libz, libbz2, ramfs and cramfs | Date | 17 Oct 2001 01:31:14 -0700 |
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Followup to: <3BCBE29D.CFEC1F05@alacritech.com> By author: "Matt D. Robinson" <yakker@alacritech.com> In newsgroup: linux.dev.kernel > > > > The -ac tree is moving to a single copy of zlib, in fs/inflate_fs. It > > is currently used by cramfs and zisofs. jffs2 in the -ac tree still > > uses its own copy of zlib and should be converted. > > Any plans to fix this for the Linus tree? Also, why place this in fs? > Shouldn't this be around for PPP along with other things that > can use it (like LKCD)? >
PPP uses a nonstandard deviant of zlib, or *so I've been told*, so that one is out.
The reason it's in fs is because I wasn't feeling sure that the memory management as implemented is adequate for non-fs-related applications. I might change that, though, but I wanted to move somewhat slowly.
Memory management in zlib is nontrivial. If you port the user-space zlib the "obvious" way to kernel space, you get memory management that is completely unacceptable to a filesystem application -- too easy to get random errors due to memory allocation failures.
A major problem is that the module name "deflate" is used by PPP, despite it being a nonstandard format...
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