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From: Ariel D'Alessandro <ariel@vanguardiasur.com.ar>
To: buildroot@busybox.net
Subject: [Buildroot] [PATCH v2 2/2] axfs: add new filesystem type
Date: Tue, 13 Oct 2015 09:12:29 -0300	[thread overview]
Message-ID: <561CF52D.3090609@vanguardiasur.com.ar> (raw)
In-Reply-To: <5612C712.6020209@mind.be>

Arnout,

El 05/10/15 a las 15:53, Arnout Vandecappelle escribi?:
> On 05-10-15 17:55, Ariel D'Alessandro wrote:
>> The Advanced XIP File System is a Linux kernel filesystem driver that enables
>> files to be executed directly from flash or ROM memory rather than being copied
>> into RAM.
>>
[snip]
>> diff --git a/fs/axfs/Config.in b/fs/axfs/Config.in
>> new file mode 100644
>> index 0000000..7e25fe7
>> --- /dev/null
>> +++ b/fs/axfs/Config.in
>> @@ -0,0 +1,4 @@
>> +config BR2_TARGET_ROOTFS_AXFS
>> +	bool "axfs root filesystem"
>> +	help
>> +	  Build an axfs root filesystem
> 
>  This needs a lot more explanation. For starters, repeat the explanation you put
> in the commit message (but wrap at 72 columns!). And perhaps you should add that
> all files will be XIPified (or whatever the verb is). Also, you should mention
> that the kernel has to be built with the axfs patches to be able to read it.

OK, I'll add some notes here.

> 
>  It would be nice to add the axfs kernel side as a kernel extension as well. But
> that looks heavily non-trivial.
> 
> 
>> diff --git a/fs/axfs/axfs.mk b/fs/axfs/axfs.mk
>> new file mode 100644
>> index 0000000..05d6e5d
>> --- /dev/null
>> +++ b/fs/axfs/axfs.mk
>> @@ -0,0 +1,13 @@
>> +################################################################################
>> +#
>> +# Build the axfs root filesystem image
>> +#
>> +################################################################################
>> +
>> +ROOTFS_AXFS_DEPENDENCIES = host-axfsutils
>> +
>> +define ROOTFS_AXFS_CMD
>> +	$(HOST_DIR)/usr/bin/mkfs.axfs -s -a $(TARGET_DIR) $@
> 
>  I'm not sure if we really want to give the -s option. Is it very verbose?
> Generally I like a bit of feedback about how the filesystem is built, and we do
> get it for e.g. squashfs.

Yeah, I think it's very verbose. But on the other hand, with the -s
option it's too quiet.
I don't know what is the main criteria. Maybe you can tell me, here's
the output of two mkfs.axfs executions with and without -s option:

--
$ ./mkfs.axfs -s -a target/ output/
number of files:                   585
number of 4KB nodes:               1752

Total image size:                       5111906
--

--
$ ./mkfs.axfs -a target/ output/
-54.49% (-728 bytes)	THIS_IS_NOT_YOUR_ROOT_FILESYSTEM
  0.00% (+0 bytes)	lib32
  0.00% (+0 bytes)	linuxrc
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  0.00% (+0 bytes)	date
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  0.00% (+0 bytes)	df
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  0.00% (+0 bytes)	dnsdomainname
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  0.00% (+0 bytes)	vi
  0.00% (+0 bytes)	watch
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  0.00% (+0 bytes)	log
-43.44% (-139 bytes)	fstab
-34.78% (-104 bytes)	group
 10.00% (+1 bytes)	hostname
  2.50% (+1 bytes)	hosts
-49.43% (-519 bytes)	inittab
-54.41% (-642 bytes)	inputrc
  4.76% (+1 bytes)	issue
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-24.14% (-28 bytes)	os-release
-52.29% (-194 bytes)	passwd
-53.17% (-738 bytes)	profile
-48.54% (-1332 bytes)	protocols
  0.20% (+1 bytes)	random-seed
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-60.62% (-234 bytes)	securetty
-59.55% (-6475 bytes)	services
-65.27% (-156 bytes)	shadow
-53.95% (-348 bytes)	ts.conf
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-18.86% (-33 bytes)	.bash_logout
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  0.00% (+0 bytes)	watchdog
  0.00% (+0 bytes)	lib32
  0.00% (+0 bytes)	cache
  0.00% (+0 bytes)	lock
  0.00% (+0 bytes)	log
  0.00% (+0 bytes)	run
  0.00% (+0 bytes)	spool
  0.00% (+0 bytes)	tmp
  0.00% (+0 bytes)	S01logging
  0.00% (+0 bytes)	S20urandom
  0.00% (+0 bytes)	S40network
  0.00% (+0 bytes)	S99_rea_setup
  0.00% (+0 bytes)	rcK
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 -3.90% (-3 bytes)	interfaces
  0.00% (+0 bytes)	linux-fincore
  0.00% (+0 bytes)	mem
  0.01% (+15 bytes)	eggs.jpg
-17.02% (-4792 bytes)	renesas_logo-800x480.jpg
 -0.20% (-333 bytes)	tiger.jpg
-13.69% (-126625 bytes)	ring.wav
  0.00% (+0 bytes)	[
  0.00% (+0 bytes)	[[
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-71.48% (-1095 bytes)	dsnoop.conf
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-56.65% (-673 bytes)	hdmi.conf
-56.64% (-687 bytes)	iec958.conf
-68.19% (-896 bytes)	modem.conf
-55.51% (-413 bytes)	rear.conf
-55.51% (-413 bytes)	side.conf
-53.06% (-477 bytes)	surround21.conf
-54.39% (-477 bytes)	surround40.conf
-54.03% (-536 bytes)	surround41.conf
-54.33% (-539 bytes)	surround50.conf
-54.19% (-504 bytes)	surround51.conf
-54.50% (-533 bytes)	surround71.conf
-38.14% (-45 bytes)	sample_map.csv
-58.88% (-872 bytes)	ansi
-53.46% (-957 bytes)	linux
-53.39% (-835 bytes)	screen
-51.26% (-612 bytes)	vt100
-51.09% (-607 bytes)	vt102
-48.16% (-616 bytes)	vt200
-48.16% (-616 bytes)	vt220
-52.39% (-1713 bytes)	xterm
-59.64% (-925 bytes)	xterm-color
-52.38% (-1177 bytes)	xterm-xfree86
 -3.19% (-3 bytes)	DAISY-I2S.conf
-78.79% (-1285 bytes)	HiFi.conf
 -1.09% (-1 bytes)	GoogleNyan.conf
-77.74% (-1711 bytes)	HiFi.conf
-73.88% (-843 bytes)	HiFi.conf
-66.14% (-707 bytes)	PAZ00.conf
-78.47% (-1418 bytes)	Record.conf
-69.17% (-848 bytes)	FMAnalog
-67.08% (-591 bytes)	PandaBoard.conf
-74.48% (-1655 bytes)	hifi
-68.41% (-851 bytes)	hifiLP
-69.31% (-926 bytes)	record
-68.48% (-845 bytes)	voice
-76.31% (-1681 bytes)	voiceCall
-69.31% (-858 bytes)	FMAnalog
-67.26% (-604 bytes)	PandaBoardES.conf
-74.53% (-1665 bytes)	hifi
-68.55% (-861 bytes)	hifiLP
-69.44% (-936 bytes)	record
-68.70% (-856 bytes)	voice
-76.34% (-1691 bytes)	voiceCall
-68.87% (-832 bytes)	FMAnalog
-66.74% (-584 bytes)	SDP4430.conf
-73.84% (-1598 bytes)	hifi
-67.50% (-814 bytes)	hifiLP
-68.76% (-821 bytes)	record
-67.64% (-809 bytes)	voice
-75.98% (-1645 bytes)	voiceCall
-67.64% (-719 bytes)	tegraalc5632.conf

number of files:                   585
number of 4KB nodes:               1752

offset to node_type bytetable:          984
offset to node_index bytetable:	        2739
offset to cnode_offset bytetable:       9759
offset to cnode_index bytetable:        11463
offset to banode_offset bytetable:      13167
offset to cblock_offset bytetable:      14991
offset to inode_file_size bytetable:    16695
offset to inode_name_offset bytetable:  19035
offset to inode_num_entries bytetable:  21375
offset to inode_mode_index bytetable:   23715
offset to inode_array_index bytetable:  26055
offset to modes bytetable:              28395
offset to uids bytetable:               28443
offset to gids bytetable:               28491
offset to zero padding:                 28539
offset to xip data:                     28672
offset to byte_aligned data:            3600384
offset to compressed data:              4150720
offset to strings data:                 5106657
offset to zero padding:                 5111902

Total image size:                       5111906
--

> 
> 
>  But basically, the patch looks good to me. I'm a bit surprised it's so simple.

Cool, thanks again for your response.

-- 
Ariel D'Alessandro, VanguardiaSur
www.vanguardiasur.com.ar

  parent reply	other threads:[~2015-10-13 12:12 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-05 16:55 [Buildroot] [PATCH v2 0/2] Add support for AXFS filesystem type Ariel D'Alessandro
2015-10-05 16:55 ` [Buildroot] [PATCH v2 1/2] axfsutils: add new package Ariel D'Alessandro
2015-10-05 18:39   ` Arnout Vandecappelle
2015-10-13 12:06     ` Ariel D'Alessandro
2015-10-05 16:55 ` [Buildroot] [PATCH v2 2/2] axfs: add new filesystem type Ariel D'Alessandro
2015-10-05 18:53   ` Arnout Vandecappelle
2015-10-05 18:59     ` Ezequiel Garcia
2015-10-05 19:09       ` Arnout Vandecappelle
2015-10-13 12:12     ` Ariel D'Alessandro [this message]
2015-10-13 20:24       ` Yann E. MORIN
2015-10-13 21:14         ` Arnout Vandecappelle
2015-10-13 20:53     ` Yann E. MORIN
2015-10-14 15:50       ` Ariel D'Alessandro
2015-10-13 21:14 ` [Buildroot] [PATCH v2 0/2] Add support for AXFS " Thomas Petazzoni
2015-10-14 16:05   ` Ariel D'Alessandro
2015-10-14 17:06     ` Thomas Petazzoni

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