Linux's vmalloc Seeing "Large Performance Benefits" With 5.2 Kernel Changes

[urezki]

I gave a talk about this at LLC conference(https://lundlinuxcon.org) in Sweden. So if somebody is interested
in you can find more details about it here: ftp://vps418301.ovh.net/incoming/Rew...nux_kernel.pdf

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Vlad Rezki

[nuetzel]

I gave a talk about this at LLC conference(https://lundlinuxcon.org) in Sweden. So if somebody is interested
in you can find more details about it here: ftp://vps418301.ovh.net/incoming/Rew...nux_kernel.pdf

--
Vlad Rezki

GREAT work! -Thank you.

[zexelon]

This is obviously a huge travesty. Now all the SNES emulators will have to embed delay ops to counteract this performance improvement and keep the speed run players honest!

[tajjada]

AFAIK ZFS is a heavy user of vmalloc, because it was ported from Solaris and using virtual memory in kernelspace is much more popular there than in Linux. Too bad ZFS is slow af on crippled 5.0+ kernels without patches to fix them.

[GreenReaper]

AFAIK ZFS is a heavy user of vmalloc, because it was ported from Solaris and using virtual memory in kernelspace is much more popular there than in Linux. Too bad ZFS is slow af on crippled 5.0+ kernels without patches to fix them.

Well, here's your patch. What Linus taketh with one hand, he giveth back with another. Never said the performance had to be in the same place. ;-)

[ryao]

AFAIK ZFS is a heavy user of vmalloc, because it was ported from Solaris and using virtual memory in kernelspace is much more popular there than in Linux. Too bad ZFS is slow af on crippled 5.0+ kernels without patches to fix them.

Just a FYI, OpenZFS stopped heavily using `vmalloc()` in 0.7.0 in 2017 when the ABD work was put into a stable release.