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RFC: linux: add linux rump kernel build #93

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@thehajime thehajime commented Mar 16, 2017

**Please don't merge as-is **
This is to ask your comment on an extension to support Linux kernel as a rump kernel.
(and the update of #65)

This commit requires the PR rumpkernel/buildrump.sh#78.

build-rr.sh adds new -r option to switch what rump kernel is used:
NetBSD is the default one and add Linux one for the alternative in this
patch.

Although there are several limitations (listed below) in this stage,
this would be a first step toward supporting alternate rump kernel
across different ones.

Limitations:

  • no xen execution support (build should be fine)
  • no i486 build support
  • pthread is not properly implemented: tests are failed and uses
  • TLS is still not working
    TEST_LESS env for the minimum test
  • CXX is always false: CXX=false should be added to build linux rump
    kernel
  • no libz support
  • no cookfs (/rootfs) support
  • rumprun-packages needs more work: current test on travis is only build
    test and the executions might have various issues.

@thehajime thehajime force-pushed the lkl-rumprun-upstream branch 2 times, most recently from 57e4554 to b214dcd Compare March 26, 2017 01:24
@thehajime
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Found a sweet spot for pthread support and the PR is updated, slightly reduces ifdefs and the pthread_test now passes. Still struggling on supporting TLS with musl libc.

I would love to ask any opinions on the patch in any aspects since the changes are a bit large.

@anttikantee
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Review process is documented here:
http://rumpkernel.org/contrib.html

@thehajime
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@anttikantee thanks, will get back at the list.

@thehajime thehajime force-pushed the lkl-rumprun-upstream branch 3 times, most recently from 13dc908 to 39841d7 Compare March 30, 2017 01:14
@thehajime thehajime force-pushed the lkl-rumprun-upstream branch 5 times, most recently from 5995ebe to 552fc55 Compare April 14, 2017 08:49
@thehajime thehajime force-pushed the lkl-rumprun-upstream branch 5 times, most recently from 91d91aa to fb08e11 Compare May 1, 2017 05:03
@thehajime thehajime force-pushed the lkl-rumprun-upstream branch from fb08e11 to d7849e7 Compare December 17, 2017 23:34
@thehajime thehajime force-pushed the lkl-rumprun-upstream branch 2 times, most recently from 2a8a33f to c05b187 Compare February 6, 2018 04:08
build-rr.sh adds new -r option to switch what rump kernel is used:
NetBSD is the default one and add Linux one for the alternative in this
patch.

Although there are several limitations (listed below) in this stage,
this would be a first step toward supporting alternate rump kernel
across different ones.

Limitations:
- no xen execution support (build should be fine)
- no i486 build support
- CXX is always false: CXX=false should be added to build linux rump
  kernel
- no libz support
- no cookfs (/rootfs) support
- rumprun-packages needs more work: current test on travis is only build
  test and the executions might have various issues.
@thehajime thehajime force-pushed the lkl-rumprun-upstream branch from c05b187 to 5418b11 Compare February 6, 2018 04:14
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2 participants