Date: Fri, 20 Mar 2026 07:16:18 +0000 From: Jake Freeland <jfree@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 33345b883485 - main - timerfd: Suppress kqueue readability after jump read Message-ID: <69bcf442.3bfcc.7e4ee027@gitrepo.freebsd.org>
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The branch main has been updated by jfree: URL: https://cgit.FreeBSD.org/src/commit/?id=33345b8834859cf1ad7f1256f3a34b4a7c83e8e8 commit 33345b8834859cf1ad7f1256f3a34b4a7c83e8e8 Author: Jake Freeland <jfree@FreeBSD.org> AuthorDate: 2026-03-20 06:34:15 +0000 Commit: Jake Freeland <jfree@FreeBSD.org> CommitDate: 2026-03-20 07:15:09 +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 --- 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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