From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 864D1D358E5 for ; Thu, 29 Jan 2026 09:05:41 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vlNxS-00036h-5U; Thu, 29 Jan 2026 04:04:58 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vlNxO-00034K-1F for qemu-devel@nongnu.org; Thu, 29 Jan 2026 04:04:54 -0500 Received: from smtp-out2.suse.de ([2a07:de40:b251:101:10:150:64:2]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1vlNxK-0006gV-Hv for qemu-devel@nongnu.org; Thu, 29 Jan 2026 04:04:52 -0500 Received: from hawking.nue2.suse.org (unknown [10.168.4.11]) by smtp-out2.suse.de (Postfix) with ESMTP id E7BC25BCE6; Thu, 29 Jan 2026 09:04:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1769677486; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=G7Z6a5azrdJIt9pnVn9XS9/W6lGM9miKyPhAOkCSsV8=; b=uhZNVk+mFHfwM1pb7QrfaZlSQCrkZjKOV+OJUFbO/7x2pv7HlWUGR1OV0HyuqCaqUNE6WF 4FxksriPq4MN0NyFC3h2VPEqBxubsiC+KQNe3osH6/AHX2UxuyaC1tXcpG03KE9kNQih2E SnWXzdL9QxDKY4G7ehLXb/Q3PP9HWBw= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1769677486; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=G7Z6a5azrdJIt9pnVn9XS9/W6lGM9miKyPhAOkCSsV8=; b=nE2Y2wnH4nuR1iUztqI0mt0Zk8bP2LGbq6poG8fFBw4PqPFIJSGPiqlHtqrgcW6jVbBbKZ jDErvwf8ELDh7PCg== Authentication-Results: smtp-out2.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1769677482; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=G7Z6a5azrdJIt9pnVn9XS9/W6lGM9miKyPhAOkCSsV8=; b=tqMEYIssIIlSiLZw5tZNkSMvta3E8MGBuAUCaRqLOjf6gBLFmOjRhI35qrPX7YlLr16IuC 20A5EWrUUiU+qx1Zwwrw6/p30vvaoXIQ3LC+/DcLCZ75blyn0VbZZ9d6sqFLxLvV+OlOwn hEDWDg3yNzkDwDvD4o2Io7JJQPobtQ0= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1769677482; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=G7Z6a5azrdJIt9pnVn9XS9/W6lGM9miKyPhAOkCSsV8=; b=MeylBtIeT2sj5vms2E+DerK6uRSGGzSVo/nmllcW3Ttb8pOu3SV/Tz9eImUC8SRj/C9XHC Xrkym9yUfMLHV3DA== Received: by hawking.nue2.suse.org (Postfix, from userid 17005) id B83A04A056A; Thu, 29 Jan 2026 10:04:42 +0100 (CET) From: Andreas Schwab To: Paolo Bonzini Cc: qemu-devel@nongnu.org, Igor Mammedov Subject: Re: [PATCH 19/19] tcg/user: do not set exit_request gratuitously In-Reply-To: <20250908101241.2110068-20-pbonzini@redhat.com> (Paolo Bonzini's message of "Mon, 8 Sep 2025 12:12:41 +0200") References: <20250908101241.2110068-1-pbonzini@redhat.com> <20250908101241.2110068-20-pbonzini@redhat.com> Date: Thu, 29 Jan 2026 10:04:42 +0100 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Spamd-Result: default: False [-4.16 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.16)[-0.811]; RCVD_NO_TLS_LAST(0.10)[]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; SEM_URIBL_UNKNOWN_FAIL(0.00)[suse.de:server fail]; RCVD_COUNT_ONE(0.00)[1]; TO_DN_SOME(0.00)[]; ARC_NA(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; FROM_HAS_DN(0.00)[]; FUZZY_RATELIMITED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:mid,suse.de:email] Received-SPF: pass client-ip=2a07:de40:b251:101:10:150:64:2; envelope-from=schwab@suse.de; helo=smtp-out2.suse.de X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Sep 08 2025, Paolo Bonzini wrote: > Whenever user-mode emulation needs to go all the way out of the cpu > exec loop, it uses cpu_exit(), which already sets cpu->exit_request. > > Therefore, there is no need for tcg_kick_vcpu_thread() to set > cpu->exit_request again outside system emulation. This breaks go. If you run go build in a loop, it eventually hangs uninterruptible (except -9) with a couple of zombie children left over. -- Andreas Schwab, SUSE Labs, schwab@suse.de GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7 "And now for something completely different."