Neue Version des SquashFS

[Grinded]

Hi,

 

es gibt seit kurzem eine neue Version des SquashFS, ist das auch etwas für's Image?

 

Gruß

Grinded

[SnowHead]

@Grinded

 

Wenn es in's CVS eingecheckt ist, kommt

es automatisch auch in's nächte Image.

[Worschter]

Hi,

 

mal abgesehen davon, daß ich mich bisher zu dumm dazu angestellt hab das einzubauen

Wäre mal interessant was das bringen soll. Die 3.0´ er Version hatte glaub nur den Vorteli daß man

riesengrosse Files handhaben konnte, etliche GB glaub ich.

 

Was versprichhst Du Dir davon

[Grinded]

Hi Worschter,

 

versprechen kann ich mir davon nichts, dafür bin ich vielzu unbedarft was die Erstellung eines Images angeht :-) Ich hatte lediglich die Meldung auf Sourceforge gesehen und wollte darauf aufmerksam machen.

 

In der neuen Version sind u.a. folgende Dinge anders:

 

Version 3.1
19 AUG 2006	This release has some major improvements to the squashfs-tools, a couple of major bug fixes, lots of small improvements/bug fixes, and new kernel patches.

	 
1. Mksquashfs has been rewritten to be multi-threaded.  It has the following improvements.

1.1. Parallel compression.  By default as many compression and fragment compression threads are created as there are available processors.  This significantly speeds up performance on SMP systems.

1.2. File input and filesystem output is peformed in parallel on separate threads to maximise I/O performance.  Even on single processor systems this speeds up performance by at least 10%.

1.3. Appending has been significantly improved, and files within the filesystem being appended to are no longer scanned and checksummed.  This significantly improves append time for large filesystems.

1.4. File duplicate checking has been optimised, and split into two separate phases.  Only files which are considered possible duplicates after the first phase are checksummed and cached in memory.

1.5 The use of swap memory was found to significantly impact performance. The amount of memory used to cache files is now a command line option, by default this is 512 Mbytes.

2. Unsquashfs has the following improvements

2.1  Unsquashfs now allows you to specify the filename or the directory within the Squashfs filesystem that is to be extracted, rather than always extracting the entire filesystem.

2.2  A new -force option has been added which forces Unsquashfs to output to the destination directory even if files and directories already exist in the destination directory.  This allows you to update an already existing directory tree, or to Unsquashfs to a partially filled directory tree.  Without the -force option Unsquashfs will refuse to output.

3.  The following major bug fixes have been made

3.1 A fragment table rounding bug has been fixed in Mksquashfs. Previously if the number of fragments in the filesystem were a multiple of 512, Mksquashfs would generate an incorrect filesystem.

3.2 A rare SMP bug which occurred when simultaneously acccessing multiply mounted Squashfs filesystems has been fixed.

4. Miscellaneous improvements/bug fixes

4.1 Kernel code stack usage has been reduced.  This is to ensure Squashfs works with 4K stacks.

4.2   Readdir (Squashfs kernel code) has been fixed to always return 0, rather than the number of directories read.  Squashfs should now interact better with NFS.

4.3 Lseek bug in Mksquashfs when appending to larger than 4GB filesystems fixed.

4.4 Squashfs 2.x initrds can now been mounted.

4.5 Unsquashfs exit status fixed.

4.6 New patches for linux-2.6.18 and linux-2.4.33.

 

Wenn es nichts für das Image bringt ist es auch ok, aber dann haben wir wenigstens mal drüber gesprochen.

 

Gruß

Grinded

[Worschter]

hm,

 

klingt ansich schon brauchbar auf den ersten Blick, das war bei der 3.0 er Version anders.

Muss doch mal schauen wie man das u-boot patchen muss, damit das funzt, wenn´s denn geht