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From: "DERUMIER, Alexandre" <alexandre.derumier@groupe-cyllene.com>
To: "pve-devel@lists.proxmox.com" <pve-devel@lists.proxmox.com>,
	"f.ebner@proxmox.com" <f.ebner@proxmox.com>,
	"k.chai@proxmox.com" <k.chai@proxmox.com>
Subject: Re: [PATCH pve-qemu 0/2] Re-enable tcmalloc as the memory allocator
Date: Fri, 10 Apr 2026 10:45:33 +0000	[thread overview]
Message-ID: <4628fcc1c283bc4ae80f19e6fe8ae922c0968af9.camel@groupe-cyllene.com> (raw)
In-Reply-To: <b1db5ad4-b3aa-4980-afd6-56cce2120fad@proxmox.com>


>>How does the performance change when doing IO within a QEMU guest?
>>
>>How does this affect the performance for other storage types, like
>>ZFS,
>>qcow2 on top of directory-based storages, qcow2 on top of LVM, LVM-
>>thin,
>>etc. and other workloads like saving VM state during snapshot,
>>transfer
>>during migration, maybe memory hotplug/ballooning, network
>>performance
>>for vNICs?

Hi Fiona,

I'm stil running in production (I have keeped tcmalloc after the
removal some year ago from the pve build), and I didn't notice problem.
(but I still don't use pbs).

But I never have done bench with/without it since 5/6 year.

Maybe vm memory should be checked too, I'm thinking about RSS memory
with balloon free_page_reporting, to see if it's correcting freeing
memory.






      reply	other threads:[~2026-04-10 10:45 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-04-10  4:30 Kefu Chai
2026-04-10  4:30 ` [PATCH pve-qemu 1/2] PVE: use " Kefu Chai
2026-04-10  4:30 ` [PATCH pve-qemu 2/2] d/rules: enable " Kefu Chai
2026-04-10  8:12 ` [PATCH pve-qemu 0/2] Re-enable " Fiona Ebner
2026-04-10 10:45   ` DERUMIER, Alexandre [this message]

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