From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [IPv6:2a01:7e0:0:424::9]) by lore.proxmox.com (Postfix) with ESMTPS id ECD8E1FF1D9 for ; Tue, 14 Apr 2026 17:36:46 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id F41C81DA19; Tue, 14 Apr 2026 17:36:45 +0200 (CEST) Message-ID: Date: Tue, 14 Apr 2026 17:36:41 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 pve-qemu 0/2] Re-enable tcmalloc as the memory allocator From: Fiona Ebner To: Kefu Chai , pve-devel@lists.proxmox.com References: <20260414054645.405151-1-k.chai@proxmox.com> Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Bm-Milter-Handled: 55990f41-d878-4baa-be0a-ee34c49e34d2 X-Bm-Transport-Timestamp: 1776180925631 X-SPAM-LEVEL: Spam detection results: 0 AWL 0.007 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DMARC_MISSING 0.1 Missing DMARC policy KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment RCVD_IN_VALIDITY_CERTIFIED_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. RCVD_IN_VALIDITY_RPBL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. RCVD_IN_VALIDITY_SAFE_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Message-ID-Hash: 6RPAETBMD44RBFQLEC5XAKSIHYTG754C X-Message-ID-Hash: 6RPAETBMD44RBFQLEC5XAKSIHYTG754C X-MailFrom: f.ebner@proxmox.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.10 Precedence: list List-Id: Proxmox VE development discussion List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Am 14.04.26 um 1:08 PM schrieb Fiona Ebner: > Note that I did play around with memory hotplug and ballooning before as > well, not sure if related. > > Unfortunately, I don't have the debug symbols for librbd.so.1 right now: > >> Program terminated with signal SIGSEGV, Segmentation fault. >> #0 0x00007ea8da6442d0 in tc_memalign () from /lib/x86_64-linux-gnu/libtcmalloc.so.4 >> [Current thread is 1 (Thread 0x7ea8ca66a6c0 (LWP 109157))] I had added malloc_stats(); calls around MallocExtension_ReleaseFreeMemory(); to better see the effects, which also requires including malloc.h in pve-backup.c when building for tcmalloc. I also did a few backups before, so I can't rule out that it's related to that. I did a build of librbd1 and librados2 with the debug symbols now, but haven't been able to reproduce the issue yet. Will try more tomorrow.