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+sig...@m5p.com PGP 87145445 | ) / \_CS\ | _____ -O #include <stddisclaimer.h> O- _____ | / _/ 8A19\___\_|_/58D2 7E3D DDF4 7BA6 <-PGP-> 41D1 B375 37D0 8714\_|_/___/5445
