From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=82.195.75.108 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793626424; b=Zmdx0Siihw6MEMZLRLO+ikj1XWN6CYKlq6L02KUna2hDvskEchVrNNB3TgUPiHSVF46w 5WTiU4xnW1l99P4mN4vHvM0jtLoKKJsPwHW/s2do395wTRlAEeNrFUJuNTCXwJkcPqcdf DNKgPIq7kYnwULn3wFCjsfDKPNh/BvFT0j3sMZyWvfa1Y6u8nnqCZ3qV2xicH3xWgNr1E 0YlehspiqTSWmB+ulmEUzN2wce+1vR/tmB8dHud3Rmfhf+RGAeg6gTPagC1j9X8uUcsbA zMpTy6UU20palxM+3IHdIUGQ62A13nmMMnN5KZa2zIuuXnsLDwJG7x+2KV0/mNYanDA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793626424; h=DMARC-Filter:DKIM-Signature:Received:Date:From:To:Cc:Subject: Message-ID:References:MIME-Version:Content-Type:Content-Disposition: In-Reply-To:X-Debian-User; bh=DB+JdwCkQJDdbmqEBm13F/PLEFpOBew80JeNxQJjjmk=; b=g1oe8ULb3zhZBiQhMosgCjohfmAU0uIG6SGtFMmNgerJczVezEEcEinXozU/mEeqZDEX MvztwLp7trx/esflqrjzgckHXHOW1JFDQDU9XKaucim+ij5Rjeijf7QfnEj6/b1/uDS7Z 531qTtsBwYmwrjRmlkXLz6wEbo4BVPBf68gcTRcm0EvqAPOibvWkceyezLAp8BD2J6pMU WchJiLLa6JfNn2rL6/iGQvoRaCKHJizkALigK9XUeC7uabQJkhbOYtz5HgpAH+gYyksfy 8WkUH7aTDqrVJXjAUZMvY+aSpVpj4XDHBSH6VtnhqGvvWIIxtq2BWcNksb4zKyi/vJA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=debian.org; spf=pass smtp.mailfrom=debian.org; dkim=pass header.d=debian.org header.i=@debian.org header.a=rsa-sha256 header.s=smtpauto.stravinsky header.b=T9NFJfTi; arc=none smtp.remote-ip=82.195.75.108 Received: from stravinsky.debian.org (stravinsky.debian.org [82.195.75.108]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 54E0C606A32D for ; Mon, 2 Nov 2026 13:33:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 54E0C606A32D Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=debian.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=debian.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=debian.org header.i=@debian.org header.a=rsa-sha256 header.s=smtpauto.stravinsky header.b=T9NFJfTi DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=debian.org; s=smtpauto.stravinsky; h=X-Debian-User:In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=DB+JdwCkQJDdbmqEBm13F/PLEFpOBew80JeNxQJjjmk=; b=T9NFJfTin38mo/MebrQC42vNWc w+qQ/FAqMgJRcU8t4dt7LDx5xu8nrW0yeFyJnb7Q9CqHwJFsqDmlrOKkkJbf21hR6GukDWwSPEOPl EDMpJVpQrRP0V7vepkmrdFlmX+/yRBzXJVugi4GNuCcFNJUqp+GN7eYPEt1/J2rDjd1yNr1o0qHC6 LBcJa8nEAktcHQrr3x7YdjETVLck/e1tTcGSBxy8VX3Zjsvxqc5foQ2/8hvGU7kkMAjGRhMgwvG/E Kz1iuPt4uB+YzkKmVNzazjXa0f5lzTRGY12c5Uc36b2VA5L8/8zcoZz9GP8yDfI9lGeq0Usr2d6Ka m+Uu7TJA==; Received: from authenticated-user by stravinsky.debian.org with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.96) (envelope-from ) id 1xNsA4-006BsB-0y; Mon, 02 Nov 2026 13:33:20 +0000 Date: Mon, 2 Nov 2026 05:33:15 -0800 From: Breno Leitao To: Peter Zijlstra Cc: x86@kernel.org, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, steve.wahl@hpe.com, justin.ernst@hpe.com, kyle.meyer@hpe.com, dimitri.sivanich@hpe.com, russ.anderson@hpe.com, linux-kernel@vger.kernel.org, mhiramat@kernel.org Subject: Re: [PATCH] x86: Drop KGDB support Message-ID: References: <20261028122124.GJ2668804@noisy.programming.kicks-ass.net> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261028122124.GJ2668804@noisy.programming.kicks-ass.net> X-Debian-User: leitao On Wed, Oct 28, 2026 at 01:21:24PM +0100, Peter Zijlstra wrote: > > KGDB does some horrible things, and with everybody having access to > virtualization these days, there is really no reason to use it over > Qemu's gdb-server. kgdb_panic() also adds a different code flow on the crash/kexec path, which makes things more complex. See a recent discussion about this: https://lore.kernel.org/all/auiO_x_Am8ZmZcmw@gmail.com/ > Signed-off-by: Peter Zijlstra (Intel) Acked-by: Breno Leitao