what happened to the SoC 2019 zram for freebsd project?

cracauer@ said:
Has there ever been a study to show that it is a clear win?
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not sure if it is an one size fits all type solution, but pretty sure that it helps in the cases where you don't have a gen 5 ssd that can swap at more 3k mb/s or when overhead on the disk is to avoided at the cost of a little cpu usage

edit: as for any study then i see that there are many articles and blogs that say something similar in tune but nothing like an actual research paper or case study
 
Crivens said:
Didn't we have this discussion here somewhere?
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oh, in case there was, i am sorry to create another thread for this but if that thread is really old then maybe it is fine as i have seen on forums it is better to create a new thread rather then necroposting, as posts like that usually tend to get ignored for some reason, but i will make sure for next time :)
 
wismos said:
not sure if it is an one size fits all type solution, but pretty sure that it helps in the cases where you don't have a gen 5 ssd that can swap at more 3k mb/s or when overhead on the disk is to avoided at the cost of a little cpu usage
Click to expand...

I am more concerned about incompressible data, detecting it (by trying to compress it and failing) and the like. It can be hard to tune this right.
 
I am sorry but is this what zram is? A block partition using MD and add it via fstab? Thank you for the clarifications.

Code: 
Device          1K-blocks     Used    Avail Capacity
/dev/nvd1p3       2097152  1317692   779460    63%
/dev/md50         4194304  1611352  2582952    38%
/dev/md51         4194304  1583736  2610568    38%
/dev/md52         4194304  1582140  2612164    38%
/dev/md53         4194304  1574960  2619344    38%
/dev/md54         4194304  1579376  2614928    38%
/dev/md55         4194304  1579772  2614532    38%
Total            27262976 10829028 16433948    40%
 
GoNeFast_01 said:
I am sorry but is this what zram is? A block partition using MD and add it via fstab? Thank you for the clarifications.

Code: 
Device          1K-blocks     Used    Avail Capacity
/dev/nvd1p3       2097152  1317692   779460    63%
/dev/md50         4194304  1611352  2582952    38%
/dev/md51         4194304  1583736  2610568    38%
/dev/md52         4194304  1582140  2612164    38%
/dev/md53         4194304  1574960  2619344    38%
/dev/md54         4194304  1579376  2614928    38%
/dev/md55         4194304  1579772  2614532    38%
Total            27262976 10829028 16433948    40%
Click to expand...
not really, zram is a kmod that creates a swap block devices that does on the fly compression in memory which helps most in the cases of low end hardware with low amounts of memory
you can refer to these for more info

Linux_3.14 - Linux Kernel Newbies

Summary of the changes and new features merged in the Linux kernel during the 3.14 development cycle
kernelnewbies.org

zram: Compressed RAM-based block devices — The Linux Kernel documentation

docs.kernel.org docs.kernel.org

and an answer to the same question on the freebsd mailing list:https://lists.freebsd.org/pipermail/freebsd-hackers/2017-June/051120.html
 
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