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>> On Fri Jan 16, 2026 at 10:09 AM EST, Greg Kroah-Hartman wrote: >> [...] >> >> >> >> >> The SVC doesn' really serve a purpose here, as there is no bus to >> >> manage, and adding its support only increase the complexity and the c= ode >> >> size needed on memory-constrained devices. >> > >> > Exactly how much memory does a "single point" SVC driver take, vs. >> > adding new P2P functionality everywhere in the code like you just did? >> > Finding that out would be good first before worrying about adding >> > another type of "bus" here please. >> >> Sorry for not giving numbers in the cover letter. We measured 10kB of >> code size difference (which may be on the higher end of the spectrum) >> and in Zephyr [1] they measured a 2kB difference (which is probably on >> the lower end considering the implementation is pretty barebone). > > Please submit your "empty" SVC driver, 10kb seems too big to me, I think > we can slim it down, or at the very least, see what is making it "large" > and potentially work to reduce that. The comparison I did originally was pretty naive. When I tested without the SVC, the C files were not even compiled. What I didn't account for is that our SVC currently logs pretty extensively, and guess where these log strings are stored... After removing the logs, I could compare apples to apples: - with SVC: 59,272 B - without SVC: 57,556 B So not even 2kB difference. > For Zephyr, I thought it was 1kb in the github comments, but still 2kb > seems reasonable :) The last comment in the thread says 2kB, but it's in the same ballpark. So I think we have our number, an empty SVC would be in the 1kB to 2kB range.