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Can anyone explain what the interrupt remapping is?

Would turning this feature off in the Linux kernel cause any problems, or bring any benefits?

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Gory details there –  Stéphane Chazelas Jul 30 '13 at 12:25
    
@StephaneChazelas How about a full answer instead? That link is great. –  Nils Jul 30 '13 at 13:57

1 Answer 1

Can anyone explain what the interrupt remapping is?

It's a software capability for rerouting signals sent from peripheral devices.

Would turning this feature off in the Linux kernel cause any problems?

I believe this feature allows the kernel to replace the remapping tables created by your BIOS (which is also a piece of software), so if you turn it off, I guess it then becomes a question of how well the kernel and the BIOS remapping get along.

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hi, today i have added the intremap=off in grub.conf file and started the server and sap application also running on that. till now its behaving perfect but don't know in future. i have gone through some blog saying that all Intel chip set 5520 and 5500 having bug with interrupt remapping feature. Anyone aware of this issue –  Raj Aah Jul 30 '13 at 14:24

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