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* CONFIG_XXX vs CONFIG_HAVE_XXX ?
@ 2025-05-18 17:45 Alexandre Ferrieux
  2025-05-18 18:22 ` संदर्भ: " Siddh Raman Pant
  0 siblings, 1 reply; 13+ messages in thread
From: Alexandre Ferrieux @ 2025-05-18 17:45 UTC (permalink / raw)
  To: kernelnewbies

Hi,

What is the rationale behind having, for some feature XXX, both configuration
macros CONFIG_XXX and CONFIG_HAVE_XXX ?

For example, I'd love to use ftrace's new life-saving feature "funcgraph-retval"
(which instantly shows the root cause of an error returned from a fully graphed
function). Unfortunately, on all recent Debians the config says:

  CONFIG_HAVE_FUNCTION_GRAPH_RETVAL=y
  # CONFIG_FUNCTION_GRAPH_RETVAL is not set

As a result, the feature is not available. Okay, I'll just enable and recompile.
However, I'm wondering why in the first place such a situation is possible: what
is the intention there ? Either we want the feature, or we don't (e.g. because
it may incur some CPU or memory overhead), but why sit halfway in between ?

Thanks in advance,

-Alex

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* [ANNOUNCE] Call for Contributors: ASIOS – AI‑Native OS (Kernel Work)
@ 2025-05-03  6:52 Vikram R
  2025-05-19 19:27 ` Vikram R
  0 siblings, 1 reply; 13+ messages in thread
From: Vikram R @ 2025-05-03  6:52 UTC (permalink / raw)
  To: linux-kernel; +Cc: linux-newbie, kernelnewbies

ASIOS is a new AI‑native OS (Ubuntu 24.04 LTS base) bringing
deterministic scheduling, NUMA‑GPU optimizations, zero‑copy I/O, and
eBPF telemetry into the Linux kernel.

Key directions—
— Deterministic CPU scheduling for reproducible AI runs
— NUMA‑aware memory placement tuned for GPU DMA
— Zero‑copy GPU I/O via GPUDirect RDMA/Storage
— eBPF‑based telemetry hooks

**Call for contributors:** scheduler/MM, GPU/accelerator integration,
eBPF instrumentation.

Project links—
GitHub: <https://github.com/asi-os>
Discord: <https://discord.gg/rWuU7cWU4E>
Roadmap: <https://github.com/asi-os/asios-docs/blob/main/docs/ARCHITECTURE.md>

Please reply on‑list with questions or join us on Discord to dive into
the design.

Vikram Karlex R
KarLex AI, Inc. | <https://asios.ai> | <https://karlex.ai>

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@ 2016-10-05 12:53 고영준
  0 siblings, 0 replies; 13+ messages in thread
From: 고영준 @ 2016-10-05 12:53 UTC (permalink / raw)
  To: kernelnewbies

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@ 2013-10-02 15:58 Daniel Kranich
  0 siblings, 0 replies; 13+ messages in thread
From: Daniel Kranich @ 2013-10-02 15:58 UTC (permalink / raw)
  To: kernelnewbies



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@ 2013-09-15 13:52 GMAIL
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From: GMAIL @ 2013-09-15 13:52 UTC (permalink / raw)
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@ 2013-09-11  8:43 GMAIL
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From: GMAIL @ 2013-09-11  8:43 UTC (permalink / raw)
  To: kernelnewbies

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@ 2011-01-06 17:42 marduk
  0 siblings, 0 replies; 13+ messages in thread
From: marduk @ 2011-01-06 17:42 UTC (permalink / raw)
  To: kernelnewbies

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2025-05-18 17:45 CONFIG_XXX vs CONFIG_HAVE_XXX ? Alexandre Ferrieux
2025-05-18 18:22 ` संदर्भ: " Siddh Raman Pant
2025-05-18 18:37   ` unsubscribe Mrunal Gawade
2025-05-19  6:45   ` unsubscribe Mrunal Gawade
2025-05-19  8:34   ` CONFIG_XXX vs CONFIG_HAVE_XXX ? Alexandre Ferrieux
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2025-05-03  6:52 [ANNOUNCE] Call for Contributors: ASIOS – AI‑Native OS (Kernel Work) Vikram R
2025-05-19 19:27 ` Vikram R
2025-05-19 20:20   ` unsubscribe Mrunal Gawade
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