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Groups > linux.kernel > #1228975 > unrolled thread
| Started by | Andy Lutomirski <luto@kernel.org> |
|---|---|
| First post | 2015-09-21 01:40 +0200 |
| Last post | 2015-09-21 21:20 +0200 |
| Articles | 2 — 2 participants |
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[PATCH 0/2] x86: NMI vs paravirt fixes Andy Lutomirski <luto@kernel.org> - 2015-09-21 01:40 +0200
Re: [PATCH 0/2] x86: NMI vs paravirt fixes Andy Lutomirski <luto@amacapital.net> - 2015-09-21 21:20 +0200
| From | Andy Lutomirski <luto@kernel.org> |
|---|---|
| Date | 2015-09-21 01:40 +0200 |
| Subject | [PATCH 0/2] x86: NMI vs paravirt fixes |
| Message-ID | <qaWn7-6bs-13@gated-at.bofh.it> |
These are for x86/urgent. This fixes at least one problem that Sasha can trigger using some crazy configuration + Trinity. I can't reproduce the full file of nastiness that he's seeing, but these patches both look legit to me, they fix what look like real bugs, and they seem to help Sasha's tests. Patch 1 is ugly. Feel free to tell me to shove the asm into the entry asm files, although that will involve duplicating it for 32-bit and 64-bit kernels. Andy Lutomirski (2): x86/paravirt: Replace the paravirt nop with a bona fide empty function x86/nmi/64: Fix a paravirt stack-clobbering bug in the NMI code arch/x86/entry/entry_64.S | 16 +++++++++++++++- arch/x86/kernel/paravirt.c | 16 ++++++++++++---- 2 files changed, 27 insertions(+), 5 deletions(-) -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Andy Lutomirski <luto@amacapital.net> |
|---|---|
| Date | 2015-09-21 21:20 +0200 |
| Message-ID | <qbeN3-7m5-7@gated-at.bofh.it> |
| In reply to | #1228975 |
On Sun, Sep 20, 2015 at 4:32 PM, Andy Lutomirski <luto@kernel.org> wrote: > These are for x86/urgent. > > This fixes at least one problem that Sasha can trigger using some > crazy configuration + Trinity. I can't reproduce the full file of > nastiness that he's seeing, but these patches both look legit to me, > they fix what look like real bugs, and they seem to help Sasha's > tests. > > Patch 1 is ugly. Feel free to tell me to shove the asm into the > entry asm files, although that will involve duplicating it for > 32-bit and 64-bit kernels. It turns out that Sasha had noreplace-paravirt on, which is probably how he was able to hit these reliably. They're still bugs, though. --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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