Date: Fri, 03 Apr 2026 15:26:19 +0000 From: Jake Freeland <jfree@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 9d710692d207 - stable/15 - timerfd: Suppress kqueue readability after jump read Message-ID: <69cfdc1b.40b41.7b1e61d2@gitrepo.freebsd.org>
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The branch stable/15 has been updated by jfree: URL: https://cgit.FreeBSD.org/src/commit/?id=9d710692d2075e14633f19c2b2c496b71554d29c commit 9d710692d2075e14633f19c2b2c496b71554d29c Author: Jake Freeland <jfree@FreeBSD.org> AuthorDate: 2026-03-20 06:34:15 +0000 Commit: Jake Freeland <jfree@FreeBSD.org> CommitDate: 2026-04-03 15:25:36 +0000 timerfd: Suppress kqueue readability after jump read Do not report EVFILT_READ after reading a discontinuous clock jump. This makes the kqueue filter consistent with Linux epoll behavior and timerfd_poll(), which already checks tfd_jumped != TFD_READ before reporting POLLIN. MFC after: 2 weeks (cherry picked from commit 33345b8834859cf1ad7f1256f3a34b4a7c83e8e8) --- sys/kern/sys_timerfd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sys/kern/sys_timerfd.c b/sys/kern/sys_timerfd.c index e4d00f224505..22e6a30faa21 100644 --- a/sys/kern/sys_timerfd.c +++ b/sys/kern/sys_timerfd.c @@ -290,7 +290,7 @@ filt_timerfdread(struct knote *kn, long hint) mtx_assert(&tfd->tfd_lock, MA_OWNED); kn->kn_data = (int64_t)tfd->tfd_count; - return (tfd->tfd_count > 0); + return (tfd->tfd_count > 0 && tfd->tfd_jumped != TFD_READ); } static const struct filterops timerfd_rfiltops = {home | help
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