On 10/25/17 15:56, O'Connor, Daniel wrote: >> On 26 Oct 2017, at 08:13, Colin Percival <cperc...@tarsnap.com> wrote: >> [Proposal for removing hpt* drivers since hpt27xx and hptnr take a long >> time to in DEVICE_PROBE.] > > Seems sensible to me, but also worth contacting the blob authors if > possible and asking them what gives (and if they can fix it).
Turns out that they were indeed able to fix it, with startling rapidity. delphij@ committed r325683 (MFCed as r32600[56]) which reduces the time spent in these DEVICE_PROBE routines from ~150 ms down to ~37 *us* on my laptop. So my immediate desire for faster booting has been satisfied with regard to these drivers. I know some people (CCed) were enthusiastic about removing these from GENERIC on the basis that we shouldn't have binary blobs in GENERIC; while I'm certainly sympathetic to this, I'd suggest that it should be done by someone who has time to look at the other binary blobs in the tree and formulate a general policy rather than just picking on the hpt* drivers. Unfortunately, that person is not me; I have 12 days left to submit a talk to AsiaBSDCon about my work on profiling the kernel boot (which is how I noticed the slow probing originally) and then a long list of other places to speed up the boot performance. -- Colin Percival Security Officer Emeritus, FreeBSD | The power to serve Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid _______________________________________________ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
