users May 2019

users@lists.genode.org

13 participants
13 discussions

Pre 19.05 compiler warnings "this statement may fall through"
by Duss Pirmin 22 May '19

22 May '19

Hello Genodians While testing the update to Genode 19.05 I recognized many "this statement may fall through" warnings. I have created patches for the following files: base/include/util/string.h base/include/util/arg_string.h The patches are located at: https://github.com/trimpim/genode/tree/gcc8.3_fall_through_warnings Feel free to pick them up, if you like. Best regards, Pirmin

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pre 19.05 feedback: libc port update breaks mkfs from e2fsprogs
by Duss Pirmin 21 May '19

21 May '19

Hello Genodians I'm running preparations for the transition to Genode 19.05. mkfs.run from https://github.com/trimpim/genode/tree/test-19.05-mkfs_fails fails with the error message (KERNEL=nova): "/dev/block: Memory allocation failed while setting up superblock". Through bisecting I determined, that the libc port update seems to be the cause of the problem. a55af1828 last working commit dd5aa1748 .. 057a8b0b3 build fails 132ef4dcb compiles, test fails The error occurs in line 76 in the file src/noux-pkg/e2fsprogs/lib/ext2fs/inline.c of the contrib code. Best regards Pirmin

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Interesting paper on breaking down OS-abstractions
by Guido Witmond 03 May '19

03 May '19

Hi Genodians, Today I came across this paper[1] on the slowdown from POSIX and other kernel abstractions. It offers the notion of a parakernel to break down the monolithic kernel and take kernel abstractions out of the data path. It seems that Genode, although not a parakernel, is quite well adapted to this. Not by accident, I think ;-) It's discussed at [2] 1: https://penberg.org/parakernel-hotos19.pdf 2: https://news.ycombinator.com/item?id=19818899

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users May 2019