questions for kernel-team (fwd)
I sent this to the bug where I found the issue mentioned, but that
didn't replicate the message to debian-boot. I'm sending here because
it's an issue more related to the installer.
---------- Forwarded message ----------
To: 227705@bugs.debian.org
Hello
this issue (ide=nodma boot time option does not work) is blocking a
possible workaround for a number of other bug reports (all to do with
DMA errors mucking up the cdrom-detect and/or cdrom-retriever steps of
the installation from netinst). Example bugs: 265636, 258316, 250323,
maybe 283016.
This issue is still present in i386 RC2 netinst, I tried booting with
linux ide=nodma
expert ide=nodma
linux26 ide=nodma
and in all cases the installer failed as in 265636, with dma errors
when trying to access the package pool.
I also tried giving the "nodma" option to the ide-cd module in
when loading it in the "expert" mode. This too was ignored.
Could someone on the team briefly explain why ide=nodma is disabled?
Is it that turning off dma does not work reliably?
If yes, then what do you think the negative effects would be of setting
CONFIG_IDEDMA_ONLYDISK=y ?
Before resigning from Debian, Herbert Xu was considering turning this
on (#250323).
Also, it appears that
CONFIG_IDEDMA_PCI_AUTO=y
and if so is that a good idea when trying to support older h/w?
This close to release, I would not normally bring up changing the kernel
config, except that these bugs seem to occur on older Dell hardware
fairly often. So there may be a fairly large potential user base affected.
Kind regards
Vince
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