From nobody Thu Oct 08 12:21:46 2026 X-Original-To: dev-commits-src-branches@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4j0pyL3LtZz6vZ3N for ; Thu, 08 Oct 2026 12:21:46 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "YR2" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4j0pyL1brlz4Mf6 for ; Thu, 08 Oct 2026 12:21:46 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1791462106; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=rCHE3nNpsGwRj38gGwOXiGd9dlvViS3HY+x/ddQf40s=; b=YWkrOat5mGK0By9tqDGW6UzhgXdaZMH6x6hZbZfK995FlbdBLe3XjxNvfo1G6uHi8qnL2J FDxOU9sxZSSjX90e0+40NwBDgko6x7xHv2A/XcxqbNoRN64pSRtcdGWtxAVMHH/rdqc9Dn O5HdcC5uFrcMSVoTcqu3GyqwIzTKxyp2u6dKK+cwXvL9ElWX2ZisZsfOYp1yUu+4SOUWBR bqcYg8gWpZRNsUIot9N/Jc7sbK5hW0XJxu6NxUXvCQW0NbjkSc0dzlms3xNozPY4bkbTwQ zwurWbotk0eOtR+MEzwSvvfybIWE1l7KOl8hw2JV5MH5fkQdPzL4DVBNp7+Y6A== ARC-Seal: i=1; a=rsa-sha256; d=freebsd.org; s=dkim; cv=none; t=1791462106; b=p6nqrbXV2KG1PKTAAJ95h654+CTt2N+3Uou68UOUOtGRyRoSC23s4udmobzZs9MtRd3uA9 TNjJh8kL1D7XMCEmCwC4TFZMSePyqlzGVP3smOYnW+xdHjWlqPhfpYLoWa4G17zZd3I6b1 l82LOGyEjWlntyCj+dx/JgZjfZDLZ9z3ra7qOVJYRw63k8VTJl1CzpqylCSISXM1ldhdga 3Rtapo4B3vdCfbNGCcGhqTivXwZwOXMfY1CNITqv4ifWhNwvdrgf2JHnH8yu9t4lE6PJ6d kt2j12FMUkqgBdgH3dzc1YJrDF+wbw17gj9OakgWiXkMXjID0anpan7cigG/aQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1791462106; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=rCHE3nNpsGwRj38gGwOXiGd9dlvViS3HY+x/ddQf40s=; b=KONj4RkPz4yBKZxFlajN9R51y1hF016EDWCEIzMOwFVw0wTqAB7LAhSP3OkNIM0jkKYdnj zWeRgRpZT0fDpvw0gbDR/5FXeIChBbiTBoh1smFMSpZZYDBJeFCbO5n3ojMwmp9q0LogHc g4X/AaZ695U85TThM8pYvI86pJdXhYV0H1HbTAe4d12A5vihkIQkrehvgotAyQN+YmMKlK dy364EtPNLNJSDq+iP8q0iD1QwRAN2Kpx484ljiG3PNsVVdNI+hosJuTtwzPlJUzSjA2iG RrEY2+CmkQxzhyw2t7U39JtZku5s626mkkQwi7ACGVcPqqv3b28u06yOgx+yJw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4j0pyL0g5WzgTx for ; Thu, 08 Oct 2026 12:21:46 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from git (uid 1279) (envelope-from git@FreeBSD.org) id 1c5fa by gitrepo.freebsd.org (DragonFly Mail Agent v0.13+ on gitrepo.freebsd.org); Thu, 08 Oct 2026 12:21:46 +0000 To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Olivier Certner Subject: git: 65cd5ed09b66 - stable/15 - NOTES: IPI_PREEMPTION: Fix documentation, applies to all architectures List-Id: Commits to the stable branches of the FreeBSD src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-branches List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-branches@freebsd.org Sender: owner-dev-commits-src-branches@FreeBSD.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: olce X-Git-Repository: src X-Git-Refname: refs/heads/stable/15 X-Git-Reftype: branch X-Git-Commit: 65cd5ed09b663e61ae60b40d038751dfee8e8e10 Auto-Submitted: auto-generated Date: Thu, 08 Oct 2026 12:21:46 +0000 Message-Id: <6ac78ada.1c5fa.79990da2@gitrepo.freebsd.org> The branch stable/15 has been updated by olce: URL: https://cgit.FreeBSD.org/src/commit/?id=65cd5ed09b663e61ae60b40d038751dfee8e8e10 commit 65cd5ed09b663e61ae60b40d038751dfee8e8e10 Author: Olivier Certner AuthorDate: 2026-09-24 16:04:35 +0000 Commit: Olivier Certner CommitDate: 2026-10-08 12:20:07 +0000 NOTES: IPI_PREEMPTION: Fix documentation, applies to all architectures Move its description into 'sys/conf/NOTES' and update it to match reality. Reviewed by: scheduler (mchoo) MFC after: 3 days Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D60013 (cherry picked from commit d972d832f580c307cdfd87d563a382f40877dd10) --- sys/conf/NOTES | 6 ++++++ sys/x86/conf/NOTES | 7 ------- 2 files changed, 6 insertions(+), 7 deletions(-) diff --git a/sys/conf/NOTES b/sys/conf/NOTES index 040df12b3408..63ccd85c2317 100644 --- a/sys/conf/NOTES +++ b/sys/conf/NOTES @@ -282,6 +282,12 @@ options SX_NOINLINE # and allows interrupt threads to run sooner rather than waiting. options PREEMPTION +# IPI_PREEMPTION instructs the 4BSD scheduler to immediately preempt a thread +# running on a specific CPU when a thread pinned there has higher priority, +# instead of waiting for a return to userland. It has no effect on other +# schedulers (e.g., ULE). +options IPI_PREEMPTION + # SMP Debugging Options: # # CALLOUT_PROFILING enables rudimentary profiling of the callwheel data diff --git a/sys/x86/conf/NOTES b/sys/x86/conf/NOTES index 3e8793e9d1ae..4adbe3fa1309 100644 --- a/sys/x86/conf/NOTES +++ b/sys/x86/conf/NOTES @@ -28,13 +28,6 @@ ##################################################################### # SMP OPTIONS: # -# Notes: -# -# IPI_PREEMPTION instructs the kernel to preempt threads running on other -# CPUS if needed. Relies on the PREEMPTION option - -# Optional: -options IPI_PREEMPTION # Debugging options. #