From: Eric Blake <eblake@redhat.com>
To: Kevin Wolf <kwolf@redhat.com>
Cc: qemu-devel@nongnu.org, qemu-block@nongnu.org,
Stefan Hajnoczi <stefanha@redhat.com>,
Fam Zheng <famz@redhat.com>, Max Reitz <mreitz@redhat.com>
Subject: Re: [Qemu-devel] [PATCH 1/5] block: Fragment reads to max transfer length
Date: Fri, 8 Jul 2016 08:31:39 -0600 [thread overview]
Message-ID: <577FB94B.6060809@redhat.com> (raw)
In-Reply-To: <20160708105600.GJ14684@noname.redhat.com>
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On 07/08/2016 04:56 AM, Kevin Wolf wrote:
> Am 21.06.2016 um 01:39 hat Eric Blake geschrieben:
>> Drivers should be able to rely on the block layer honoring the
>> max transfer length, rather than needing to return -EINVAL
>> (iscsi) or manually fragment things (nbd). This patch adds
>> the fragmentation in the block layer, after requests have been
>> aligned (fragmenting before alignment would lead to multiple
>> unaligned requests, rather than just the head and tail).
>>
>> Signed-off-by: Eric Blake <eblake@redhat.com>
>
> Doesn't build for me:
>
> block/io.c: In function 'bdrv_aligned_preadv':
> block/io.c:1071:5: error: 'ret' may be used uninitialized in this function [-Werror=maybe-uninitialized]
> return ret;
One of those annoying problems detected at -O2 but not at -O0. I'll respin.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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next prev parent reply other threads:[~2016-07-08 14:31 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-20 23:39 [Qemu-devel] [PATCH 0/5] Auto-fragment large transactions at the block layer Eric Blake
2016-06-20 23:39 ` [Qemu-devel] [PATCH 1/5] block: Fragment reads to max transfer length Eric Blake
2016-07-08 10:56 ` Kevin Wolf
2016-07-08 14:31 ` Eric Blake [this message]
2016-06-20 23:39 ` [Qemu-devel] [PATCH 2/5] block: Fragment writes " Eric Blake
2016-06-20 23:39 ` [Qemu-devel] [PATCH 3/5] raw_bsd: Don't advertise flags not supported by protocol layer Eric Blake
2016-07-08 11:05 ` Kevin Wolf
2016-07-08 14:32 ` Eric Blake
2016-06-20 23:39 ` [Qemu-devel] [PATCH 4/5] nbd: Rely on block layer to break up large requests Eric Blake
2016-06-20 23:39 ` [Qemu-devel] [PATCH 5/5] nbd: Drop unused offset parameter Eric Blake
2016-07-08 11:11 ` Kevin Wolf
2016-06-21 3:19 ` [Qemu-devel] [PATCH 6/5] iscsi: Rely on block layer to break up large requests Eric Blake
2016-06-21 4:17 ` [Qemu-devel] [PATCH 0/5] Auto-fragment large transactions at the block layer Eric Blake
2016-06-21 10:23 ` Stefan Hajnoczi
2016-06-21 10:43 ` Kevin Wolf
2016-06-22 11:41 ` Stefan Hajnoczi
2016-06-21 22:05 ` Eric Blake
2016-06-22 11:41 ` Stefan Hajnoczi
2016-06-22 5:54 ` Fam Zheng
2016-07-06 2:04 ` Eric Blake
2016-07-08 11:15 ` Kevin Wolf
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