From: no-reply@sashiko.virtuozzo.com
To: "Denis V. Lunev" <den@openvz.org>, svt-core@virtuozzo.com
Cc: andrey.drobyshev@virtuozzo.com, den@virtuozzo.com
Subject: Re: [PATCH hci-8.0 5/9] block/block-copy: don't reserve memory for zero tasks #VSTOR-134085
Date: Wed, 30 Sep 2026 11:22:20 +0000 [thread overview]
Message-ID: <010701a0f20d1bf2-292609bb-a501-428a-a6f5-61d8247eb6a4-000000@eu-central-1.amazonses.com> (raw)
In-Reply-To: <20260930111739.3866427-6-den@openvz.org>
> From: Denis V. Lunev <den@openvz.org>
>
> block_copy_dirty_clusters() charges task->req.bytes to the shared memory
> pool for every task, but a COPY_WRITE_ZEROES task allocates no bounce
> buffer, so there is nothing to account for. Add
> block_copy_task_shres_bytes() and use it at all three call sites.
>
> Zero tasks lose the throttling the pool gave them incidentally and are
> bounded only by BLOCK_COPY_MAX_WORKERS (64).
>
> Reviewed-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
> Signed-off-by: Denis V. Lunev <den@openvz.org>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.vzint.dev/#/patchset/20260930111739.3866427-1-den@openvz.org?part=5
next prev parent reply other threads:[~2026-09-30 11:22 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-30 11:17 [PATCH hci-8.0 0/9] block: cheaper zero handling in backup and commit #VSTOR-134085 Denis V. Lunev
2026-09-30 11:17 ` [PATCH hci-8.0 1/9] block/commit: pass BDRV_WANT_PRECISE to block-status #VSTOR-134085 Denis V. Lunev
2026-09-30 11:20 ` no-reply
2026-09-30 11:17 ` [PATCH hci-8.0 2/9] iotests/040: cover large and fragmented commit runs #VSTOR-134085 Denis V. Lunev
2026-09-30 11:19 ` no-reply
2026-09-30 11:17 ` [PATCH hci-8.0 3/9] block/commit: batch block-status queries #VSTOR-134085 Denis V. Lunev
2026-09-30 11:21 ` no-reply
2026-09-30 11:17 ` [PATCH hci-8.0 4/9] iotests/124: cover backup of zero clusters and holes #VSTOR-134085 Denis V. Lunev
2026-09-30 11:31 ` no-reply
2026-09-30 11:17 ` [PATCH hci-8.0 5/9] block/block-copy: don't reserve memory for zero tasks #VSTOR-134085 Denis V. Lunev
2026-09-30 11:22 ` no-reply [this message]
2026-09-30 11:17 ` [PATCH hci-8.0 6/9] block/block-copy: extract block_copy_set_task_method() #VSTOR-134085 Denis V. Lunev
2026-09-30 11:22 ` no-reply
2026-09-30 11:17 ` [PATCH hci-8.0 7/9] block/block-copy: track known-zero source clusters #VSTOR-134085 Denis V. Lunev
2026-09-30 11:30 ` no-reply
2026-09-30 11:17 ` [PATCH hci-8.0 8/9] block/backup: pre-fill zero_bitmap for full/bitmap #VSTOR-134085 Denis V. Lunev
2026-09-30 11:33 ` no-reply
2026-09-30 11:17 ` [PATCH hci-8.0 9/9] block/block-copy: coalesce write-zeroes tasks #VSTOR-134085 Denis V. Lunev
2026-09-30 11:34 ` no-reply
2026-09-30 12:49 ` [PATCH hci-8.0 0/9] block: cheaper zero handling in backup and commit #VSTOR-134085 Andrey Drobyshev
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