From: Paolo Bonzini <pbonzini@redhat.com>
To: "Dmitry Fomichev" <dmitry.fomichev@wdc.com>,
"Kevin Wolf" <kwolf@redhat.com>, "Max Reitz" <mreitz@redhat.com>,
"Fam Zheng" <famz@redhat.com>,
"Maxim Levitsky" <mlevitsky@redhat.com>,
"Philippe Mathieu-Daudé" <philmd@redhat.com>
Cc: Damien Le Moal <damien.lemoal@wdc.com>,
Alistair Francis <alistair.francis@wdc.com>,
qemu-devel@nongnu.org, qemu-block@nongnu.org
Subject: Re: [PATCH 0/2] block; scsi-generic: Fix max transfer size calculation
Date: Mon, 17 Aug 2020 18:38:02 +0200 [thread overview]
Message-ID: <d01fb82b-7f09-ddcc-4161-36cfd6e65f22@redhat.com> (raw)
In-Reply-To: <20200811225122.17342-1-dmitry.fomichev@wdc.com>
On 12/08/20 00:51, Dmitry Fomichev wrote:
> When a host-managed zoned device is passed through to the
> guest system using scsi-generic driver, the maximum i/o size for the
> drive at the guest may end up being larger than at the host, causing
> i/o errors while accessing the backing zoned drive at the host system.
>
> Two problems prevent correct setting of the maximum i/o transfer size
> at the guest in this configuration. One issue is specific to
> host-managed zone devices - scsi-generic driver doesn't recognize the
> SCSI type of HM-zoned devices. The other problem is that file-posix
> code for finding max_segments system value doesn't correctly handle
> SG nodes.
>
> The following two patches fix these problems.
>
> Based-on: <20200424084338.26803-16-armbru@redhat.com>
>
> Dmitry Fomichev (2):
> file-posix: Correctly read max_segments of SG nodes
> scsi-generic: Fix HM-zoned device scan
>
> block/file-posix.c | 55 +++++++++++++++++++++++-----------------
> hw/scsi/scsi-generic.c | 10 +++++---
> include/scsi/constants.h | 1 +
> 3 files changed, 39 insertions(+), 27 deletions(-)
>
The patches are more or less unrelated; I have queued the second, while
the first is outside my maintenance area.
Paolo
prev parent reply other threads:[~2020-08-17 16:38 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-11 22:51 [PATCH 0/2] block;scsi-generic: Fix max transfer size calculation Dmitry Fomichev
2020-08-11 22:51 ` [PATCH 1/2] file-posix: Correctly read max_segments of SG nodes Dmitry Fomichev
2020-09-17 13:16 ` Max Reitz
2020-09-17 13:22 ` Maxim Levitsky
2020-09-17 13:24 ` Maxim Levitsky
2020-09-17 16:44 ` Dmitry Fomichev
2020-09-19 15:18 ` Paolo Bonzini
2020-09-19 15:15 ` Paolo Bonzini
2020-08-11 22:51 ` [PATCH 2/2] scsi-generic: Fix HM-zoned device scan Dmitry Fomichev
2020-08-17 15:58 ` Alistair Francis
2020-08-17 16:38 ` Paolo Bonzini [this message]
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