From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
To: Max Reitz <mreitz@redhat.com>,
"qemu-block@nongnu.org" <qemu-block@nongnu.org>
Cc: "fam@euphon.net" <fam@euphon.net>,
"kwolf@redhat.com" <kwolf@redhat.com>,
Denis Lunev <den@virtuozzo.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"armbru@redhat.com" <armbru@redhat.com>,
"stefanha@redhat.com" <stefanha@redhat.com>,
"jsnow@redhat.com" <jsnow@redhat.com>
Subject: Re: [Qemu-devel] [PATCH v3 3/7] block/io: handle alignment and max_transfer for copy_range
Date: Tue, 20 Aug 2019 15:18:28 +0000 [thread overview]
Message-ID: <88155279-77f5-ebce-7938-a7bca354f2b0@virtuozzo.com> (raw)
In-Reply-To: <519a80e3-3cec-d37c-9131-52cac0e0e4b6@redhat.com>
12.08.2019 17:48, Max Reitz wrote:
> On 10.08.19 21:31, Vladimir Sementsov-Ogievskiy wrote:
>> copy_range ignores these limitations, let's improve it.
>>
>> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
>> ---
>> block/io.c | 44 ++++++++++++++++++++++++++++++++++++--------
>> 1 file changed, 36 insertions(+), 8 deletions(-)
>
> Reviewed-by: Max Reitz <mreitz@redhat.com>
>
Hmm. Now I think that next patch is arguable, and I still don't see true way of
organizing limitation of request length and memory allocation in conjunction with
async requests in backup.
So, I'll send next version of "improvements" without this (there are already enough
simpler patches).
And this patch becomes something separate. Do you think we need it anyway? If yes,
please queue it in separate. It may be better to return ENOTSUP on too big requests
too, to keep simpler code and make callers optimize their copying loops by themselves.
--
Best regards,
Vladimir
next prev parent reply other threads:[~2019-08-20 15:21 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-10 19:31 [Qemu-devel] [PATCH v3 0/7] backup improvements Vladimir Sementsov-Ogievskiy
2019-08-10 19:31 ` [Qemu-devel] [PATCH v3 1/7] block/backup: deal with zero detection Vladimir Sementsov-Ogievskiy
2019-08-10 19:31 ` [Qemu-devel] [PATCH v3 2/7] block/backup: refactor write_flags Vladimir Sementsov-Ogievskiy
2019-08-10 19:31 ` [Qemu-devel] [PATCH v3 3/7] block/io: handle alignment and max_transfer for copy_range Vladimir Sementsov-Ogievskiy
2019-08-12 14:48 ` Max Reitz
2019-08-20 15:18 ` Vladimir Sementsov-Ogievskiy [this message]
2019-08-10 19:31 ` [Qemu-devel] [PATCH v3 4/7] block/backup: drop handling of " Vladimir Sementsov-Ogievskiy
2019-08-10 19:31 ` [Qemu-devel] [PATCH v3 5/7] block/backup: fix backup_cow_with_offload for last cluster Vladimir Sementsov-Ogievskiy
2019-08-10 19:31 ` [Qemu-devel] [PATCH v3 6/7] block/backup: teach backup_cow_with_bounce_buffer to copy more at once Vladimir Sementsov-Ogievskiy
2019-08-12 15:10 ` Max Reitz
2019-08-12 15:47 ` Vladimir Sementsov-Ogievskiy
2019-08-12 16:11 ` Max Reitz
2019-08-12 16:37 ` Vladimir Sementsov-Ogievskiy
2019-08-13 14:14 ` Vladimir Sementsov-Ogievskiy
2019-08-13 14:23 ` Max Reitz
2019-08-13 14:39 ` Vladimir Sementsov-Ogievskiy
2019-08-13 14:57 ` Max Reitz
2019-08-13 15:00 ` Vladimir Sementsov-Ogievskiy
2019-08-13 15:02 ` Max Reitz
2019-08-13 15:32 ` Vladimir Sementsov-Ogievskiy
2019-08-13 16:30 ` Max Reitz
2019-08-13 16:45 ` Vladimir Sementsov-Ogievskiy
2019-08-13 16:51 ` Max Reitz
2019-08-10 19:31 ` [Qemu-devel] [PATCH v3 7/7] block/backup: merge duplicated logic into backup_do_cow Vladimir Sementsov-Ogievskiy
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