Control: retitle -1 vmdb2: missing dependency on zerofree Control: found -1 0.27+really.0.26-1 Control: severity -1 serious
Cc += Emanuele, Christian. Michael Tokarev <m...@tls.msk.ru> (2023-09-17): > Please do not add dependency on zerofree. > > Instead, pleas DROP zerofree usage entirely in todays world. > > It gave me multiple headaches already. > > First I tried to experiment with autopkgtest (which uses vmdb2) > on a tmpfs. It all went fine until vmdb2 decided to helpfully > zerofree the image, - which expanded it to whole RAM and immediately > caused an OOM. I had to clean up from this for quite some time. > > Another case is an SSD which gets filled with zeros, having to > allocate else unused blocks in the image file. > > And yet another - on a regular rotating HDD, it has to turn a > sparse file into complete file, - in a typical autopkgtest-build-qemu > use case this means writing 25Gb of data, it is insanely slow. > > If anything, one can use fstrim to achieve the desired result. > > Thanks! Please file a separate bug report instead of hijacking that one. Bumping severity to serious because getting autopkgtest-build-qemu to work is much harder than it should be (as evidenced by recurring conversations on #debian-devel at least), and getting avoidable errors doesn't help. Cheers, -- Cyril Brulebois (k...@debian.org) <https://debamax.com/> D-I release manager -- Release team member -- Freelance Consultant
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