From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Olaf Hering <olaf@aepfle.de>
Cc: James Bottomley <jejb@linux.vnet.ibm.com>,
linux-scsi@vger.kernel.org,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
linux-kernel@vger.kernel.org, devel@linuxdriverproject.org
Subject: Re: [PATCH v3] storvsc: use small sg_tablesize on x86
Date: Tue, 14 Jun 2016 22:07:02 -0400 [thread overview]
Message-ID: <yq1fusfb3y1.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <20160609220120.GA28607@aepfle.de> (Olaf Hering's message of "Fri, 10 Jun 2016 00:01:20 +0200")
>>>>> "Olaf" == Olaf Hering <olaf@aepfle.de> writes:
Olaf> On Thu, Jun 09, James Bottomley wrote:
>> On Thu, 2016-06-09 at 18:25 +0200, Olaf Hering wrote:
>> > Reducing the sg_tablesize allows booting of 32bit kernels in VMs, >
>> after > commit be0cf6ca301c61458dc4aa1a37acf4f58d2ed3d6 ("scsi:
>> storvsc: Set > the > tablesize based on the information given by the
>> host")
>> >
>> > [ 5.567138] hv_storvsc vmbus_1: adjusting sg_tablesize 0x800 -> >
>> 0x20
>>
>> Are you really sure 32 is the correct size?
Olaf> Its a size that works, while the current state does not work at
Olaf> all.
>> I know 32 it what it had before, but the reason for the commit you
>> quote was to improve performance ...
Olaf> The commit above broke 32bit. Whoever wants to improve performance
Olaf> on this dead horse can submit another patch.
K.Y.?
--
Martin K. Petersen Oracle Linux Engineering
WARNING: multiple messages have this Message-ID (diff)
From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Olaf Hering <olaf@aepfle.de>
Cc: James Bottomley <jejb@linux.vnet.ibm.com>,
"K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
devel@linuxdriverproject.org, linux-kernel@vger.kernel.org,
linux-scsi@vger.kernel.org
Subject: Re: [PATCH v3] storvsc: use small sg_tablesize on x86
Date: Tue, 14 Jun 2016 22:07:02 -0400 [thread overview]
Message-ID: <yq1fusfb3y1.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <20160609220120.GA28607@aepfle.de> (Olaf Hering's message of "Fri, 10 Jun 2016 00:01:20 +0200")
>>>>> "Olaf" == Olaf Hering <olaf@aepfle.de> writes:
Olaf> On Thu, Jun 09, James Bottomley wrote:
>> On Thu, 2016-06-09 at 18:25 +0200, Olaf Hering wrote:
>> > Reducing the sg_tablesize allows booting of 32bit kernels in VMs, >
>> after > commit be0cf6ca301c61458dc4aa1a37acf4f58d2ed3d6 ("scsi:
>> storvsc: Set > the > tablesize based on the information given by the
>> host")
>> >
>> > [ 5.567138] hv_storvsc vmbus_1: adjusting sg_tablesize 0x800 -> >
>> 0x20
>>
>> Are you really sure 32 is the correct size?
Olaf> Its a size that works, while the current state does not work at
Olaf> all.
>> I know 32 it what it had before, but the reason for the commit you
>> quote was to improve performance ...
Olaf> The commit above broke 32bit. Whoever wants to improve performance
Olaf> on this dead horse can submit another patch.
K.Y.?
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2016-06-15 2:07 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-09 16:25 [PATCH v3] storvsc: use small sg_tablesize on x86 Olaf Hering
2016-06-09 16:25 ` Olaf Hering
2016-06-09 17:25 ` James Bottomley
2016-06-09 22:01 ` Olaf Hering
2016-06-15 2:07 ` Martin K. Petersen [this message]
2016-06-15 2:07 ` Martin K. Petersen
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