Date: Mon, 16 Jun 2025 09:45:58 -0400 From: Mark Johnston <markj@freebsd.org> To: Warner Losh <imp@freebsd.org> Cc: src-committers@freebsd.org, dev-commits-src-all@freebsd.org, dev-commits-src-main@freebsd.org Subject: Re: git: 7b7ba7857ce8 - main - Implement CLOCK_TAI Message-ID: <aFAgFvsBaSIx4NL_@nuc> In-Reply-To: <202506121825.55CIPemP006355@gitrepo.freebsd.org> References: <202506121825.55CIPemP006355@gitrepo.freebsd.org>
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On Thu, Jun 12, 2025 at 06:25:40PM +0000, Warner Losh wrote: > The branch main has been updated by imp: > > URL: https://cgit.FreeBSD.org/src/commit/?id=7b7ba7857ce8be0bf6ab905d936d8ba1363e4ec2 > > commit 7b7ba7857ce8be0bf6ab905d936d8ba1363e4ec2 > Author: Nathan Whitehorn <nwhitehorn@FreeBSD.org> > AuthorDate: 2025-06-12 17:52:30 +0000 > Commit: Warner Losh <imp@FreeBSD.org> > CommitDate: 2025-06-12 18:25:31 +0000 > > Implement CLOCK_TAI > > Provide a clock through clock_gettime() that returns the current TAI > time (UTC without leap seconds) as a complement to CLOCK_REALTIME. This > provides compatibility with Linux, which also provides a CLOCK_TAI since > kernel 2.6.26, and this seems to be becoming the standard way to acquire > TAI time. Unlike Linux, this code will return EINVAL if the TAI offset > (set by ntpd, ptpd, etc.) is not known since it seems pathological for > CLOCK_TAI to silently give the wrong (UTC) time if the offset is not > known as it does on Linux. kern_clock_nanosleep() asserts that kern_clock_gettime() never returns an error, and this new case breaks that: https://syzkaller.appspot.com/bug?extid=e17e46b1f0b65027b005
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