From: Robert Obkircher <r.obkircher@proxmox.com>
To: pbs-devel@lists.proxmox.com
Subject: Re: [PATCH v6 proxmox-backup 07/18] datastore: verify that chunk_size is a power of two
Date: Tue, 17 Feb 2026 10:13:22 +0100 [thread overview]
Message-ID: <376f156b-4343-4be4-8653-2b58fff4abd0@proxmox.com> (raw)
In-Reply-To: <20260210150642.469670-8-r.obkircher@proxmox.com>
On 2/10/26 16:05, Robert Obkircher wrote:
> Guarantee that the bitmasks used to compute the modulo actually yield
> the correct value and implicitly guard against divisions by zero.
The bitmask trick for faster modulo operations is used by the Reader
[1] and Writer [2].
[1]
https://git.proxmox.com/?p=proxmox-backup.git;a=blob;f=pbs-datastore/src/fixed_index.rs;h=6c3be2d492d3b15a04b2d4356d7183d75c349f26;hb=HEAD#l210
[2]
https://git.proxmox.com/?p=proxmox-backup.git;a=blob;f=pbs-datastore/src/fixed_index.rs;h=6c3be2d492d3b15a04b2d4356d7183d75c349f26;hb=HEAD#l380
[..]
next prev parent reply other threads:[~2026-02-17 9:13 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-10 15:06 [PATCH v6 proxmox-backup 00/18] fix: #3847 pipe from STDIN to proxmox-backup-client Robert Obkircher
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 01/18] datastore: remove Arc<ChunkStore> from FixedIndexWriter Robert Obkircher
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 02/18] datastore: remove Arc<ChunkStore> from DynamicIndexWriter Robert Obkircher
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 03/18] datastore: add TempDir that is automatically deleted on drop Robert Obkircher
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 04/18] datastore: use temporary directory for chunk store test Robert Obkircher
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 05/18] datastore: combine public FixedIndexWriter methods into add_chunk Robert Obkircher
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 06/18] datastore: use fixed size types for FixedIndexWriter Robert Obkircher
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 07/18] datastore: verify that chunk_size is a power of two Robert Obkircher
2026-02-17 9:13 ` Robert Obkircher [this message]
2026-02-17 9:40 ` Christian Ebner
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 08/18] datastore: support writing fidx files of unknown size Robert Obkircher
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 09/18] datastore: test FixedIndexWriter Robert Obkircher
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 10/18] api: backup: make fixed index file size optional Robert Obkircher
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 11/18] api: verify fixed index writer size on close Robert Obkircher
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 12/18] client: don't poll terminated source in FixedChunkStream Robert Obkircher
2026-02-17 10:01 ` Christian Ebner
2026-02-17 10:06 ` Christian Ebner
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 13/18] client: don't poll terminated source in ChunkStream Robert Obkircher
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 14/18] fix #3847: client: support fifo pipe inputs for image backups Robert Obkircher
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 15/18] client: Fail early if the same pipe is specified for multiple inputs Robert Obkircher
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 16/18] datastore: compute fidx file size with overflow checks Robert Obkircher
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 17/18] datastore: support writing fidx files on systems with larger page size Robert Obkircher
2026-02-10 15:06 ` [PATCH v6 proxmox-backup 18/18] datastore: support incremental fidx uploads with different size Robert Obkircher
2026-02-17 12:42 ` [PATCH v6 proxmox-backup 00/18] fix: #3847 pipe from STDIN to proxmox-backup-client Christian Ebner
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