Re: [PATCH v2 pve-qemu 1/2] add patch to support using tcmalloc as the memory allocator

[Fiona Ebner <f.ebner@proxmox.com>]

Am 14.04.26 um 7:45 AM schrieb Kefu Chai:
> Add allocator-aware memory release in the backup completion path:
> since tcmalloc does not provide glibc's malloc_trim(), use the
> tcmalloc-specific MallocExtension_ReleaseFreeMemory() API instead.
> This function walks tcmalloc's page heap free span lists and calls
> madvise(MADV_DONTNEED) -- it does not walk allocated memory or compact
> the heap, so latency impact is negligible.
> 
> Also adds a CONFIG_TCMALLOC meson define so the conditional compilation
> in pve-backup.c can detect the allocator choice.
> 
> Signed-off-by: Kefu Chai <k.chai@proxmox.com>
> Acked-by: Fiona Ebner <f.ebner@proxmox.com>
> ---
>  ...use-tcmalloc-as-the-memory-allocator.patch | 77 +++++++++++++++++++
>  debian/patches/series                         |  1 +
>  2 files changed, 78 insertions(+)
>  create mode 100644 debian/patches/pve/0048-PVE-use-tcmalloc-as-the-memory-allocator.patch

The name of the patch file does not reflect the updated commit title.

> 
> diff --git a/debian/patches/pve/0048-PVE-use-tcmalloc-as-the-memory-allocator.patch b/debian/patches/pve/0048-PVE-use-tcmalloc-as-the-memory-allocator.patch
> new file mode 100644
> index 0000000..f8171ae
> --- /dev/null
> +++ b/debian/patches/pve/0048-PVE-use-tcmalloc-as-the-memory-allocator.patch
> @@ -0,0 +1,77 @@
> +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
> +From: Kefu Chai <k.chai@proxmox.com>
> +Date: Thu, 9 Apr 2026 17:29:10 +0800
> +Subject: [PATCH] PVE-Backup: support using tcmalloc as the memory allocator