From: Alberto Garcia <berto@igalia.com>
To: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>,
Kevin Wolf <kwolf@redhat.com>,
qemu-block@nongnu.org
Cc: qemu-devel@nongnu.org, mreitz@redhat.com
Subject: Re: [PATCH v4 4/9] qcow2: Support BDRV_REQ_ZERO_WRITE for truncate
Date: Tue, 21 Apr 2020 12:50:16 +0200 [thread overview]
Message-ID: <w51wo699kpj.fsf@maestria.local.igalia.com> (raw)
In-Reply-To: <59085a98-338c-fb6c-db2b-0636a03d3190@virtuozzo.com>
On Tue 21 Apr 2020 10:47:17 AM CEST, Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> wrote:
>> + if ((flags & BDRV_REQ_ZERO_WRITE) && offset > old_length) {
>> + ret = qcow2_cluster_zeroize(bs, old_length, offset - old_length, 0);
>
> Hmm. As I understand, qcow2_cluster_zeroize is unprepared to
> cluster-unaligned offset/size. I think we should handle it somehow.
You're right, it actually hits an assertion :-/
I suppose you can simply round the size up to the next cluster.
Berto
next prev parent reply other threads:[~2020-04-21 10:51 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-20 13:32 [PATCH v4 0/9] block: Fix resize (extending) of short overlays Kevin Wolf
2020-04-20 13:32 ` [PATCH v4 1/9] block: Add flags to BlockDriver.bdrv_co_truncate() Kevin Wolf
2020-04-20 13:57 ` Alberto Garcia
2020-04-21 8:15 ` Vladimir Sementsov-Ogievskiy
2020-04-20 13:32 ` [PATCH v4 2/9] block: Add flags to bdrv(_co)_truncate() Kevin Wolf
2020-04-20 13:58 ` Alberto Garcia
2020-04-21 8:25 ` Vladimir Sementsov-Ogievskiy
2020-04-20 13:32 ` [PATCH v4 3/9] block-backend: Add flags to blk_truncate() Kevin Wolf
2020-04-20 13:59 ` Alberto Garcia
2020-04-21 8:33 ` Vladimir Sementsov-Ogievskiy
2020-04-20 13:32 ` [PATCH v4 4/9] qcow2: Support BDRV_REQ_ZERO_WRITE for truncate Kevin Wolf
2020-04-20 14:02 ` Alberto Garcia
2020-04-21 8:47 ` Vladimir Sementsov-Ogievskiy
2020-04-21 10:50 ` Alberto Garcia [this message]
2020-04-21 11:19 ` Vladimir Sementsov-Ogievskiy
2020-04-20 13:32 ` [PATCH v4 5/9] raw-format: " Kevin Wolf
2020-04-20 14:03 ` Alberto Garcia
2020-04-20 15:14 ` Eric Blake
2020-04-20 15:32 ` Kevin Wolf
2020-04-20 15:53 ` Eric Blake
2020-04-20 13:32 ` [PATCH v4 6/9] file-posix: " Kevin Wolf
2020-04-20 14:05 ` Alberto Garcia
2020-04-21 10:56 ` Vladimir Sementsov-Ogievskiy
2020-04-20 13:32 ` [PATCH v4 7/9] block: truncate: Don't make backing file data visible Kevin Wolf
2020-04-20 14:10 ` Alberto Garcia
2020-04-21 11:19 ` Vladimir Sementsov-Ogievskiy
2020-04-20 13:32 ` [PATCH v4 8/9] iotests: Filter testfiles out in img_info_log() Kevin Wolf
2020-04-21 11:34 ` Vladimir Sementsov-Ogievskiy
2020-04-20 13:32 ` [PATCH v4 9/9] iotests: Test committing to short backing file Kevin Wolf
2020-04-21 11:39 ` Vladimir Sementsov-Ogievskiy
2020-04-20 23:49 ` [PATCH v4 0/9] block: Fix resize (extending) of short overlays no-reply
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