From: Dmitry Fomichev <dmitry.fomichev@wdc.com>
To: "Kevin Wolf" <kwolf@redhat.com>, "Max Reitz" <mreitz@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Fam Zheng" <famz@redhat.com>,
"Maxim Levitsky" <mlevitsky@redhat.com>,
"Philippe Mathieu-Daudé" <philmd@redhat.com>
Cc: Dmitry Fomichev <dmitry.fomichev@wdc.com>,
Damien Le Moal <damien.lemoal@wdc.com>,
Alistair Francis <alistair.francis@wdc.com>,
qemu-devel@nongnu.org, qemu-block@nongnu.org
Subject: [PATCH 0/2] block;scsi-generic: Fix max transfer size calculation
Date: Wed, 12 Aug 2020 07:51:20 +0900 [thread overview]
Message-ID: <20200811225122.17342-1-dmitry.fomichev@wdc.com> (raw)
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(-)
--
2.21.0
next reply other threads:[~2020-08-11 22:52 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-11 22:51 Dmitry Fomichev [this message]
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 ` [PATCH 0/2] block; scsi-generic: Fix max transfer size calculation Paolo Bonzini
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