On 2020-05-12, John Ogness <john.ogness@xxxxxxxxxxxxx> wrote: > I have posted[0] a new lockless printk ringbuffer implementation. The > ringbuffer has been tested heavily on x86_64 and arm64 SMP > systems. However, I would also like to test it on an SMP Alpha > system. Since the main purpose of the test is to verify the memory > barriers, the tests need to run on real hardware. > > The new ringbuffer (with test routine) can also be built as a kernel > module and does not require any kernel patching. It should work on any > Linux kernel 4.20 or higher. > > Is there anyone with access to SMP Alpha hardware that would be > willing to run the tests for me? Or can someone tell me where I might > find such a candidate? Thanks! A problem leading to data corruption in the ringbuffer messages has been identified and fixed. A new version of the test module is available: https://linux:linux@xxxxxxxxxxxxxxxx/customers/printk/prb-test.tar.gz The README in the tarball explains how to build/run the test and what information to send back after the test. This test module should build/run without any kernel patching or rebooting. Even if it is only allowed to run on your SMP-Alpha for an hour, that would be very helpful for me. Thanks, John Ogness
