[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [PATCH] xen/netfront: Fix TX response spurious interrupts
On Thu, Jul 10, 2025 at 04:11:15PM +0000, Anthoine Bourgeois wrote: > We found at Vates that there are lot of spurious interrupts when > benchmarking the PV drivers of Xen. This issue appeared with a patch > that addresses security issue XSA-391 (see Fixes below). On an iperf > benchmark, spurious interrupts can represent up to 50% of the > interrupts. If this is the correct fix, near-identical fixes are needed for *all* of the Xen front-ends. Xen virtual block-devices and Xen PCI-passthrough devices are also effected by a similar issue. Thanks for finding a candidate fix, this effects many other people who have been troubled by this performance issue. FreeBSD will also need a similar fix. -- (\___(\___(\______ --=> 8-) EHM <=-- ______/)___/)___/) \BS ( | ehem+sigmsg@xxxxxxx PGP 87145445 | ) / \_CS\ | _____ -O #include <stddisclaimer.h> O- _____ | / _/ 8A19\___\_|_/58D2 7E3D DDF4 7BA6 <-PGP-> 41D1 B375 37D0 8714\_|_/___/5445
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