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Re: [Qemu-block] [Qemu-devel] [PATCH 0/3] drive-mirror: limit niov to MA
From: |
John Snow |
Subject: |
Re: [Qemu-block] [Qemu-devel] [PATCH 0/3] drive-mirror: limit niov to MAX_IOV |
Date: |
Tue, 28 Jun 2016 13:05:22 -0400 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1 |
Ping, all good?
Jeff Cody, I think this is yours?
On 06/22/2016 03:51 PM, John Snow wrote:
> e5b43573 caused a regression in the preparation of our IO vectors, such
> that if a small granularity but a large buffer size is chosen, we may
> accidentally exceed MAX_IOV and the request will fail.
>
> This has been fixed before in cae98cb8, and now we'll fix it again.
> To keep it fixed, we'll add an iotest this time.
>
> [Thanks to Max for finding the root cause.]
>
> John Snow (3):
> mirror: clarify mirror_do_read return code
> mirror: limit niov to IOV_MAX elements, again
> iotests: add small-granularity mirror test
>
> block/mirror.c | 10 ++++++++--
> tests/qemu-iotests/041 | 30 ++++++++++++++++++++++++++++++
> tests/qemu-iotests/041.out | 4 ++--
> 3 files changed, 40 insertions(+), 4 deletions(-)
>
- [Qemu-block] [PATCH 0/3] drive-mirror: limit niov to MAX_IOV, John Snow, 2016/06/22
- [Qemu-block] [PATCH 1/3] mirror: clarify mirror_do_read return code, John Snow, 2016/06/22
- [Qemu-block] [PATCH 2/3] mirror: limit niov to IOV_MAX elements, again, John Snow, 2016/06/22
- [Qemu-block] [PATCH 3/3] iotests: add small-granularity mirror test, John Snow, 2016/06/22
- Re: [Qemu-block] [Qemu-devel] [PATCH 0/3] drive-mirror: limit niov to MAX_IOV,
John Snow <=
- Re: [Qemu-block] [PATCH 0/3] drive-mirror: limit niov to MAX_IOV, Jeff Cody, 2016/06/28