Messages in this thread | | | Date | Thu, 21 Aug 2008 14:28:52 +0200 (CEST) | From | Geert Uytterhoeven <> | Subject | Re: [PATCH 10/10] AXFS: axfs_uncompress.c |
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On Thu, 21 Aug 2008, Artem Bityutskiy wrote: > On Wed, 2008-08-20 at 22:46 -0700, Jared Hulbert wrote: > > + err = zlib_inflateReset(&stream); > > + if (err != Z_OK) { > > + printk(KERN_ERR "zlib_inflateReset error %d\n", err); > > + zlib_inflateEnd(&stream); > > + zlib_inflateInit(&stream); > > + } > > just FYI, are you aware that LZO which is also present in the kernel is > much faster on decompress than zlib, while its compression is only > slightly worse?
If you want support for multiple decompression algorithms, you can switch from using zlib_inflate*() directly to calling zlib through the crypto API. Then you can call crypto_alloc_comp() with the correct decompression algorithm name.
For squashfs, I had to modify only ca. 40 lines of code.
You do need a new zlib crypto module, as the existing deflate crypto module uses the raw deflate format instead of the zlib format, and has some parameters tuned for its use in IPSec.
I hope to have some patches ready next week...
With kind regards,
Geert Uytterhoeven Software Architect
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Phone: +32 (0)2 700 8453 Fax: +32 (0)2 700 8622 E-mail: Geert.Uytterhoeven@sonycom.com Internet: http://www.sony-europe.com/
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