From nobody Thu Nov 06 16:43:14 2025 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 4d2Sg64CV7z655xL; Thu, 06 Nov 2025 16:43:14 +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 "R12" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4d2Sg63S3Tz3Flq; Thu, 06 Nov 2025 16:43:14 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1762447394; 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=VS3ELD4TVSKrxDXKcLkspaLPbQx5ZuYM4NmfZPWM6JA=; b=CGxXvl7NtYqsXHYDOl9Y5lRwILsFNMxirsUjqV1BmUu4a1TXwo/CU/3mAXGdTAzG/I6B1l pJaolUVGZLHtrmWnkj7q7Fz8DzrEAF09liigAFt9ASHEfd7c3s+2IT4cLNLLPtdP7pQymM UZHGHz+9EKU13d0P3LVmg2AjJ5QXPpoxG7sBKnnBeMlzg9xQ4aFMDCGkfHrXqGhWqTx654 6xz+2Xu6OAninT2uvpQN3AjMDmfhNYU+35sQP3P2sBn6wmQfB/RC1ll/8s7fABqRnBdriy pBbxozehyvax99A5Bwzvvf8pQrixVaPxZWdHfl5oWOIbpLpqOe1MDglkySUjdQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1762447394; 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=VS3ELD4TVSKrxDXKcLkspaLPbQx5ZuYM4NmfZPWM6JA=; b=t+eDD3RFv0tsV5RgW+EHWobs85/7YpRiX9R7z+KGsRIZXWGsm4gziGuGVLqvvGEeyj5IVj r/kiX1KFxG3YroNqkov4OJQp8Huprv0zkZgYNvk73aOclTqOGF/AZyz8Fg5njY98IeMLqE 9QnnixhyCOQOD1AXxwWzuirwmJizGWkFyeQ/lu/80+GY7ARnun54MNGYSg7YW3QKWyJoHp T8jQbdsM700vge+swK2QQZuQ3P/E0IoVFVtEZ9E3fvRscBYolptD857GeVLqZEXXYUpRgE VqM6PfG1wHyp7lL6Q1AYOu+8uieoI/kyCXE3mwe/BUiAUayUlR5zO4yT/KHqIg== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1762447394; a=rsa-sha256; cv=none; b=KRX+bEqyqFhCl68f6rUUI/flipP0HEjIWgfwCK9wXX4yhhHkgcKIM7nuBsiK3+yGSpCBoj fnPnU1zzXYWU8U6ChtN7hujp/65t9GLle4z76wHDp4/pj8vowyvY5FNXVrHPb4SX2yle74 VdZwN4dthnSEudOxle92K4+kN7YOob2xQ2kcVtnVPptnDylOqMzaLMMzcPSruXV0N7gMmx m5XsYBI2zvD3K6o9pQjf0IZGatH/aZ2Pi9yWts7khqY6Al6JJ5AR79lABty5leEq6R1f0F Dai86elJMwzytVOHj5CFbOTS1lEeJGJ01ubRFsWcOzVTRgFviFf8NcZZAvW2dA== ARC-Authentication-Results: i=1; mx1.freebsd.org; none Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (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 did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4d2Sg630RBz5XW; Thu, 06 Nov 2025 16:43:14 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.18.1/8.18.1) with ESMTP id 5A6GhED2075664; Thu, 6 Nov 2025 16:43:14 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.18.1/8.18.1/Submit) id 5A6GhEwK075661; Thu, 6 Nov 2025 16:43:14 GMT (envelope-from git) Date: Thu, 6 Nov 2025 16:43:14 GMT Message-Id: <202511061643.5A6GhEwK075661@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Alexander Ziaee Subject: git: 2608020ac8c3 - stable/15 - dumpon(8): Add a SYSCTL VARIABLES section 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 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: ziaee X-Git-Repository: src X-Git-Refname: refs/heads/stable/15 X-Git-Reftype: branch X-Git-Commit: 2608020ac8c3fe583eeaa782e99061ef54b80a0c Auto-Submitted: auto-generated The branch stable/15 has been updated by ziaee: URL: https://cgit.FreeBSD.org/src/commit/?id=2608020ac8c3fe583eeaa782e99061ef54b80a0c commit 2608020ac8c3fe583eeaa782e99061ef54b80a0c Author: Felix Johnson AuthorDate: 2025-11-06 16:32:42 +0000 Commit: Alexander Ziaee CommitDate: 2025-11-06 16:42:56 +0000 dumpon(8): Add a SYSCTL VARIABLES section Document debug.minidump and machdep.dump_retry_count sysctl variables. PR: 259393 MFC after: 3 seconds Reviewed by: gbe (previous), markj, ziaee Differential Revision: https://reviews.freebsd.org/D32618 (cherry picked from commit 850841edf6c0867a170d2637f3dacfda33d5f3dd) --- sbin/dumpon/dumpon.8 | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/sbin/dumpon/dumpon.8 b/sbin/dumpon/dumpon.8 index a57dfef7096d..f2082a58851d 100644 --- a/sbin/dumpon/dumpon.8 +++ b/sbin/dumpon/dumpon.8 @@ -228,6 +228,20 @@ total amount of physical memory as reported by the .Va hw.physmem .Xr sysctl 8 variable. +.Sh SYSCTL VARIABLES +The following +.Xr sysctl 8 +variables can be used to modify or monitor the behavior of crash dumps: +.Bl -tag -width "machdep.dump_retry_count" +.It Va debug.minidump +Set the type of kernel crash dump. +Possible values are 0 for a full crash dump or 1 for a minidump. +The default is minidump. +.It Va machdep.dump_retry_count +The maximum number of times dump will retry before giving up. +The default value is 5. +This sysctl is only supported on PowerPC and AMD64. +.El .Sh IMPLEMENTATION NOTES Because the file system layer is already dead by the time a crash dump is taken, it is not possible to send crash dumps directly to a file. @@ -377,6 +391,7 @@ needed. .Xr loader 8 , .Xr rc 8 , .Xr savecore 8 , +.Xr sysctl 8 , .Xr swapon 8 , .Xr panic 9 .Sh HISTORY