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New -zisofs parameter susp_z2=

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Thomas Schmitt
2020-10-29 09:31:48 +01:00
parent 1ddb676159
commit a9d8102996
10 changed files with 115 additions and 70 deletions
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xorriso/xorriso.texi
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@ -3624,7 +3624,7 @@ files from disk whether they already are zisofs compressed, e.g. by program
mkzftree. "by_magic=v2" enables processing of already zisofs2 compressed files
additionally to those of zisofs version 1. "by_magic=off" disables both.
@*
"version_2="off|as_needed|on enables compression by experimental version
"version_2="off|as_needed|on controls compression by experimental version
zisofs2 which can encode files of size 4 GiB or larger. The Linux kernel
(as of 5.9) does not yet know this format and will complain like
@*
@ -3640,6 +3640,10 @@ block pointers prevent this.
Mode "off" restricts compression to files smaller than 4 GiB uncompressed size.
Mode "as_needed" uses zisofs2 for larger files. Mode "on" uses zisofs2 for all
zisofs compressed files.
@*
"susp_z2="off|on controls production of SUSP entries "Z2" instead of "ZF"
with zisofs2 compressed files. Unaware Linux kernels are supposed to silently
ignore "Z2" entries.
@*
"block_size_v2="32k|64k|128k|256k|512k|1m sets the size of compression blocks
for zisofs2.
@ -3684,7 +3688,7 @@ max_bpt_f= memory is free, then block pointers of compression filters get
discarded immediately after being added. Value -1 disables this feature.
@*
"default" is the same as "level=6:block_size=32k:by_magic=off:
version_2=off:block_size_v2=128k:max_bpt=256m:max_bpt_f=256m:
version_2=off:block_size_v2=128k:susp_z2=off:max_bpt=256m:max_bpt_f=256m:
bpt_free_ratio=-1".
@c man .TP
@item -speed code|number[k|m|c|d|b]