user/sven/linux.git/lib/zlib_deflate, branch v3.12.52

zlib: slim down zlib_deflate() workspace when possible

2011-03-23T00:44:17Z

Instead of always creating a huge (268K) deflate_workspace with the maximum compression parameters (windowBits=15, memLevel=8), allow the caller to obtain a smaller workspace by specifying smaller parameter values. For example, when capturing oops and panic reports to a medium with limited capacity, such as NVRAM, compression may be the only way to capture the whole report. In this case, a small workspace (24K works fine) is a win, whether you allocate the workspace when you need it (i.e., during an oops or panic) or at boot time. I've verified that this patch works with all accepted values of windowBits (positive and negative), memLevel, and compression level. Signed-off-by: Jim Keniston Cc: Herbert Xu Cc: David Miller Cc: Chris Mason Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

trivial: fix typo "to to" in multiple files

2009-09-21T13:14:55Z

Signed-off-by: Anand Gadiyar Signed-off-by: Jiri Kosina

lib/: Spelling fixes

2008-02-03T15:48:52Z

Signed-off-by: Joe Perches Signed-off-by: Adrian Bunk

[PATCH] zlib_inflate: Upgrade library code to a recent version

2006-06-22T22:05:58Z

Upgrade the zlib_inflate implementation in the kernel from a patched version 1.1.3/4 to a patched 1.2.3. The code in the kernel is about seven years old and I noticed that the external zlib library's inflate performance was significantly faster (~50%) than the code in the kernel on ARM (and faster again on x86_32). For comparison the newer deflate code is 20% slower on ARM and 50% slower on x86_32 but gives an approx 1% compression ratio improvement. I don't consider this to be an improvement for kernel use so have no plans to change the zlib_deflate code. Various changes have been made to the zlib code in the kernel, the most significant being the extra functions/flush option used by ppp_deflate. This update reimplements the features PPP needs to ensure it continues to work. This code has been tested on ARM under both JFFS2 (with zlib compression enabled) and ppp_deflate and on x86_32. JFFS2 sees an approx. 10% real world file read speed improvement. This patch also removes ZLIB_VERSION as it no longer has a correct value. We don't need version checks anyway as the kernel's module handling will take care of that for us. This removal is also more in keeping with the zlib author's wishes (http://www.zlib.net/zlib_faq.html#faq24) and I've added something to the zlib.h header to note its a modified version. Signed-off-by: Richard Purdie Acked-by: Joern Engel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] lib/zlib*: cleanups

2006-01-10T16:01:57Z

This patch contains the following possible cleanups: - #if 0 the following unused functions: - zlib_deflate/deflate.c: zlib_deflateSetDictionary - zlib_deflate/deflate.c: zlib_deflateParams - zlib_deflate/deflate.c: zlib_deflateCopy - zlib_inflate/infblock.c: zlib_inflate_set_dictionary - zlib_inflate/infblock.c: zlib_inflate_blocks_sync_point - zlib_inflate/inflate_sync.c: zlib_inflateSync - zlib_inflate/inflate_sync.c: zlib_inflateSyncPoint - remove the following unneeded EXPORT_SYMBOL's: - zlib_deflate/deflate_syms.c: zlib_deflateCopy - zlib_deflate/deflate_syms.c: zlib_deflateParams - zlib_inflate/inflate_syms.c: zlib_inflateSync - zlib_inflate/inflate_syms.c: zlib_inflateSyncPoint Signed-off-by: Adrian Bunk Cc: Matt Mackall Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] sparse: zlib stray extern removal

2004-06-21T13:25:05Z

[PATCH] zlib: use kernel min/max

2004-03-18T23:02:04Z

From: "Randy.Dunlap" From: Michael Veeck Remove unnecessary min/max macros and changes calls to use kernel.h macros instead.

[PATCH] janitor: don't init statics to 0

2003-08-01T08:02:12Z

From: Leann Ogasawara Uninitialize static variables initialized to 0 so they are pushed to the .bss instead of .data.

[PATCH] Two more sources of "non-ANSI parameter list" warnings

2003-06-09T01:37:31Z

This removes the last sources of "non-ANSI parameter list" warnings for zlib_deflate.

[PATCH] zlib merge: avoid 8-bit window errors

2003-06-08T02:51:40Z

More merging from zlib-1.1.4 force windowBits > 8 to avoid a bug in the encoder for a window size of 256 bytes. (A complete fix will be available in 1.1.5). James Carlson: The problem is that s->strstart gets set to a very large positive integer when wsize (local copy of s->w_size) is subtracted in deflate.c:fill_window(). This happens because MAX_DIST(s) resolves as a negative number when the window size is 8 -- MAX_DIST(s) is defined as s->w_size-MIN_LOOKAHEAD in deflate.h. MIN_LOOKAHEAD is MAX_MATCH+MIN_MATCH+1, and that is 258+3+1 or 262. Since a window size of 8 gives s->w_size 256, MAX_DIST(s) is 256-262 or -6. This results in read_buf() writing over memory outside of s->window, and a crash.