From: Randy Dunlap <rdunlap@xenotime.net>
To: Lasse Collin <lasse.collin@tukaani.org>
Cc: Jan Beulich <JBeulich@novell.com>, linux-kbuild@vger.kernel.org
Subject: Re: [PATCH] adjust XZ_DEC_* Kconfig defaults
Date: Wed, 9 Feb 2011 11:27:18 -0800 [thread overview]
Message-ID: <20110209112718.0622417f.rdunlap@xenotime.net> (raw)
In-Reply-To: <201102091151.08930.lasse.collin@tukaani.org>
On Wed, 9 Feb 2011 11:51:08 +0200 Lasse Collin wrote:
> On 2011-02-09 Jan Beulich wrote:
> > Having architecture specific decoders enabled by default makes little
> > sense - only at most one of the respective encoders is being used,
> > and hence the other decoders are not necessary in the common
> > (default) case.
>
> It can be nice to be able to mount a Squashfs image containing ARM
> binaries on a x86 desktop, but maybe that isn't important enough to keep
> all BCJ filters enabled by default. If they are not enabled by default,
> I think "if EXPERT" needs to be removed from those options too.
>
> For bigger size savings, it doesn't seem too useful to have five
> decompressors enabled by default (and behind "if EXPERT") for initramfs.
> I added XZ to that list to be consistent with the existing methods, but
> it wasn't the best thing to do.
>
> Bzip2 and LZMA are completely __init, but most of the gzip, LZO, and XZ
> code for initramfs is not __init. They pull zlib_inflate,
> lzo_decompress, xz_dec, and crc32 modules into the kernel.
>
> I think gzip and LZO support for initramfs should be enough by default,
> because bzip2, LZMA, and XZ are slower to decompress. The compression
> ratio of initramfs doesn't matter much on desktop systems so the fast
> options are the best. Users of embedded systems will pick exactly one
> method anyway, ignoring the defaults.
Hi,
Did you see this email? what do you think of it?
https://lkml.org/lkml/2011/2/1/438
Subject: Change DECOMPRESS_LZMA to boolean
---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***
next prev parent reply other threads:[~2011-02-09 19:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4D5260530200007800030F22@vpn.id2.novell.com>
2011-02-09 9:51 ` [PATCH] adjust XZ_DEC_* Kconfig defaults Lasse Collin
2011-02-09 19:27 ` Randy Dunlap [this message]
2011-02-09 20:18 ` Lasse Collin
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