From: Milton Miller <miltonm@bga.com>
To: David Gibson <david@gibson.dropbear.id.au>
Cc: linuxppc-dev@ozlabs.org, Paul Mackerras <paulus@samba.org>
Subject: Re: [PATCH 2/15] boot: record header bytes in gunzip_start
Date: Wed, 18 Jul 2007 23:46:51 -0500 [thread overview]
Message-ID: <be091e2b9aa68c854d8bd77c99af91d1@bga.com> (raw)
In-Reply-To: <20070719021138.GE20458@localhost.localdomain>
On Jul 18, 2007, at 9:11 PM, David Gibson wrote:
> On Tue, Jul 10, 2007 at 05:08:05PM -0500, Milton Miller wrote:
>>
>> Record the number of header bytes skipped in the total bytes read
>> field.
>>
>> This is needed for the initramfs parsing code to find the end of the
>> zip file.
>>
>> Signed-off-by: Milton Miller <miltonm@bga.com>
>
> Ok... I assume you've checked that this is actually the correct
> semantics for that field of the zlib structure?
From looking at the comments in include/linux/zlib.h, I think its
consistent. It talks about looking at that field for statistics and
for the application to record how many bytes were read during
compression. It mentions it brifely in the inflateSync to show how
many bytes have been processed. So I say its consistent to say we
have processed the header bytes in the input file.
It appears to be for recording the number of bytes processed over all
iterations.
I dig into zlib to see if this matches the beahvior of decompressing a
zlib header, but expect it would match.
milton
next prev parent reply other threads:[~2007-07-19 4:49 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-10 22:07 [PATCH 0/15] bootwrapper: support for kexec to zImage Milton Miller
2007-07-10 22:07 ` [PATCH 1/15] boot: find initrd location from device-tree Milton Miller
2007-07-19 2:10 ` David Gibson
2007-07-10 22:08 ` [PATCH 2/15] boot: record header bytes in gunzip_start Milton Miller
2007-07-19 2:11 ` David Gibson
2007-07-19 4:46 ` Milton Miller [this message]
2007-07-10 22:08 ` [PATCH 3/15] boot: simplfy gunzip_finish Milton Miller
2007-07-19 2:39 ` David Gibson
2007-07-19 4:01 ` Milton Miller
2007-07-19 4:31 ` David Gibson
2007-07-10 22:08 ` [PATCH 4/15] bootwrapper: smp support code Milton Miller
2007-07-10 22:09 ` [PATCH 5/15] bootwrapper: occupied memory ranges Milton Miller
2007-07-10 22:09 ` [PATCH 6/15] bootwrapper: switch 64 bit cpus to 32 bit mode Milton Miller
2007-07-10 22:57 ` Segher Boessenkool
2007-07-10 22:10 ` [PATCH 7/15] bootwrapper: Add kexec callable zImage wrapper Milton Miller
2007-07-10 23:16 ` Segher Boessenkool
2007-07-10 22:10 ` [PATCH 8/15] bootwrapper: convert flatdevtree to version 16 Milton Miller
2007-07-10 22:11 ` [PATCH 9/15] bootwrapper: rtas support Milton Miller
2007-07-10 22:11 ` [PATCH 10/15] bootwrapper: add cpio file extraction library Milton Miller
2007-07-10 22:12 ` [PATCH 11/15] bootwrapper: allow vmlinuz to be an external payload Milton Miller
2007-07-10 23:11 ` Segher Boessenkool
2007-07-10 22:12 ` [PATCH 12/15] bootwrapper: extract the vmlinux from initramfs Milton Miller
2007-07-10 22:12 ` [PATCH 13/15] bootwrapper: attach an empty vmlinux Milton Miller
2007-07-10 22:12 ` [PATCH 14/15] boot: add a hook to start cpus Milton Miller
2007-07-10 22:12 ` [PATCH/EXAMPLE 15/15] bootwrapper: example sreset marshalling Milton Miller
-- strict thread matches above, loose matches on Subject: below --
2007-09-21 23:02 [PATCH 0/15] bootwrapper: kexec and external payloads Milton Miller
2007-09-21 23:03 ` [PATCH 2/15] boot: record header bytes in gunzip_start Milton Miller
2007-09-24 2:59 ` David Gibson
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