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authorLasse Collin <lasse.collin@tukaani.org>2022-04-14 14:20:46 +0300
committerLasse Collin <lasse.collin@tukaani.org>2022-04-14 14:20:46 +0300
commitc77fe55ddb7752ed0fec46967c5ec9a72632ea0c (patch)
treee6365d3d05c78f08f7ac59a2b351e828d282a744 /src/xz/file_io.c
parentxz: Make -T0 use multithreaded mode on single-core systems. (diff)
downloadxz-c77fe55ddb7752ed0fec46967c5ec9a72632ea0c.tar.xz
xz: Add a default soft memory usage limit for --threads=0.
This is a soft limit in sense that it only affects the number of threads. It never makes xz fail and it never makes xz change settings that would affect the compressed output. The idea is to make -T0 have more reasonable behavior when the system has very many cores or when a memory-hungry compression options are used. This also helps with 32-bit xz, preventing it from running out of address space. The downside of this commit is that now the number of threads might become too low compared to what the user expected. I hope this to be an acceptable compromise as the old behavior has been a source of well-argued complaints for a long time.
Diffstat (limited to 'src/xz/file_io.c')
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