Date: Wed, 23 Apr 2025 15:19:44 GMT From: Colin Percival <cperciva@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: ce9a34b1614e - main - Turn off hw.pci.intx_reroute in EC2 Message-ID: <202504231519.53NFJibG052042@gitrepo.freebsd.org>
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The branch main has been updated by cperciva: URL: https://cgit.FreeBSD.org/src/commit/?id=ce9a34b1614e37dc3f8763586448063408c7bf16 commit ce9a34b1614e37dc3f8763586448063408c7bf16 Author: Colin Percival <cperciva@FreeBSD.org> AuthorDate: 2025-04-23 15:17:51 +0000 Commit: Colin Percival <cperciva@FreeBSD.org> CommitDate: 2025-04-23 15:19:28 +0000 Turn off hw.pci.intx_reroute in EC2 Having this enabled on Graviton systems prior to Graviton 4 results in a resource leak and a kernel panic after repeated hotplug/unplug. MFC after: 3 days Sponsored by: Amazon --- release/tools/ec2.conf | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/release/tools/ec2.conf b/release/tools/ec2.conf index 507d9acabfd9..d6cb85959183 100644 --- a/release/tools/ec2.conf +++ b/release/tools/ec2.conf @@ -79,6 +79,12 @@ ec2_common() { # delay before rescanning upon device detach. echo 'debug.acpi.quirks="56"' >> ${DESTDIR}/boot/loader.conf + # The default behaviour of re-routing INTx interrupts causes a + # resource leak on INTRng (aka on Graviton systems). Repeated + # hotplug/unplug on PCI (not PCIe) Graviton systems ends up with + # a kernel panic unless we disable this. + echo 'hw.pci.intx_reroute=0' >> ${DESTDIR}/boot/loader.conf + # Load the kernel module for the Amazon "Elastic Network Adapter" echo 'if_ena_load="YES"' >> ${DESTDIR}/boot/loader.conf
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