Re: [tip:x86/setup] x86, setup: "glove box" BIOS calls -- infrastructure
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- Subject: Re: [tip:x86/setup] x86, setup: "glove box" BIOS calls -- infrastructure
- From: Alan Jenkins <sourcejedi.lkml@xxxxxxxxxxxxxx>
- Date: Mon, 13 Apr 2009 19:34:39 +0100
- Cc: Ingo Molnar <mingo@xxxxxxx>, Avi Kivity <avi@xxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Pavel Machek <pavel@xxxxxx>, mingo@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, tglx@xxxxxxxxxxxxx, hpa@xxxxxxxxxxxxxxx, rjw@xxxxxxx, linux-tip-commits@xxxxxxxxxxxxxxx
- In-reply-to: <49E367E8.7080202@xxxxxxxxx>
- References: <20090410103934.GA21506@xxxxxxx> <20090410113824.GA18823@xxxxxxxxxx> <49E0C1AB.2050608@xxxxxxxxxx> <49E17A6E.5000104@xxxxxxxxx> <alpine.LFD.2.00.0904120754240.4583@xxxxxxxxxxxxxxxxxxxxx> <20090412163356.GA2392@xxxxxxx> <49E2398A.3050405@xxxxxxxxxx> <20090413041625.GF11652@xxxxxxx> <20090413042459.GA6479@xxxxxxx> <49E367E8.7080202@xxxxxxxxx>
- Reply-to: alan-jenkins@xxxxxxxxxxxxxx
On 4/13/09, H. Peter Anvin <hpa@xxxxxxxxx> wrote:
> Ingo Molnar wrote:
>>> Yes, we could do memory checks, and ... hey, we already do that:
>>>
>>> bb577f9: x86: add periodic corruption check
>>> 5394f80: x86: check for and defend against BIOS memory corruption
>>>
>>> ... and i seem to be the one who implemented it! ;-)
>>
>> s/implemented/merged+fixed :-)
>
> Actually, what would probably be more productive than trying to track
> corruption would be to drop the low 1 MB of memory before suspend to RAM
> - make sure that it is as close to completely unused as possible.
>
> All *known* cases of low memory corruption are either boot time or due
> to s2ram.
IIRC, the first person to report the issue found that it triggered
when hotplugging a HDMI cable.
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- References:
- Re: [tip:x86/setup] x86, setup: "glove box" BIOS calls -- infrastructure
- Re: [tip:x86/setup] x86, setup: "glove box" BIOS calls -- infrastructure
- Re: [tip:x86/setup] x86, setup: "glove box" BIOS calls -- infrastructure
- Re: [tip:x86/setup] x86, setup: "glove box" BIOS calls -- infrastructure
- Re: [tip:x86/setup] x86, setup: "glove box" BIOS calls -- infrastructure
- Re: [tip:x86/setup] x86, setup: "glove box" BIOS calls -- infrastructure
- Re: [tip:x86/setup] x86, setup: "glove box" BIOS calls -- infrastructure
- Re: [tip:x86/setup] x86, setup: "glove box" BIOS calls -- infrastructure
- Re: [tip:x86/setup] x86, setup: "glove box" BIOS calls -- infrastructure
- Re: [tip:x86/setup] x86, setup: "glove box" BIOS calls -- infrastructure
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