On Wed, Sep 18, 2013 at 4:00 PM, Nicholas A. Bellinger
wrote:
> On Wed, 2013-09-18 at 01:41 -0500, Alireza Haghdoost wrote:
>> Hi
>>
>> I am working on a high throughput and low latency application which
>> does not tolerate block layer overhead to send IO request directly to
>> fiber channel lowe
Hi
I'm having problems with two systems where hot-swapping sata drives
results in their bay being permanently disabled until I cold boot the
system. My hardware configuration is fairly straight forward:
Host Bus Adapter: LSI SAS9207-8i (contains the LSISAS2308)
Case: Supermicro SuperChassis
On Wed, 2013-09-18 at 01:41 -0500, Alireza Haghdoost wrote:
> Hi
>
> I am working on a high throughput and low latency application which
> does not tolerate block layer overhead to send IO request directly to
> fiber channel lower layer SCSI driver. I used to work with libaio but
> currently I am
On Wed, Sep 18 2013, micha...@cs.wisc.edu wrote:
> From: Mike Christie
>
> If the queue is dying then we only call the rq->end_io callout.
> This leaves bios setup on the request, because the caller assumes when
> the blk_execute_rq_nowait/blk_execute_rq call has completed that
> the rq->bios hav
On 09/18/2013 05:07 PM, Douglas Gilbert wrote:
> On 13-09-18 03:58 AM, Jack Wang wrote:
>> On 09/18/2013 08:41 AM, Alireza Haghdoost wrote:
>>> Hi
>>>
>>> I am working on a high throughput and low latency application which
>>> does not tolerate block layer overhead to send IO request directly to
>>
On 13-09-18 03:58 AM, Jack Wang wrote:
On 09/18/2013 08:41 AM, Alireza Haghdoost wrote:
Hi
I am working on a high throughput and low latency application which
does not tolerate block layer overhead to send IO request directly to
fiber channel lower layer SCSI driver. I used to work with libaio
Each member in data integrity field tuple is big-endian. But the
endianness of the values being compared with these members are not
annotated. So this fixes these sparse warnings.
Reported-by: kbuild test robot
Signed-off-by: Akinobu Mita
Cc: Fengguang Wu
Cc: "James E.J. Bottomley"
Cc: Dougl
If data integrity support is enabled, prot_verify_write() is called in
response to WRITE commands and it verifies protection info from
prot_sglist by comparing against data sglist, and copies protection info
to dif_storep.
When multiple blocks are transfered by a WRITE command, it verifies and
cop
In the module initialization, invalid value for guard module parameter
is detected by the following check:
if (scsi_debug_guard > 1) {
printk(KERN_ERR "scsi_debug_init: guard must be 0 or 1\n");
return -EINVAL;
}
But this check isn't enough, because
If data integrity support is enabled, prot_verify_read() is called in
response to READ commands and it verifies protection info from dif_storep
by comparing against fake_storep, and copies protection info to
prot_sglist.
This factors out the portion of copying protection info into a separate
funct
If the module parameter virtual_gb is greater than 0, the READ command
may request the blocks which exceed actual ramdisk storage (fake_storep).
prot_verify_read() should treat those blocks as wrap around the end of
fake_storep. But it actually causes fake_storep and dif_storep buffer
overruns.
T
This patch set includes bug fixes and a warning fix which are related
to the data integrity support for scsi_debug.
Akinobu Mita (5):
scsi_debug: fix buffer overrun when DIF/DIX is enabled and virtual_gb
> 0
scsi_debug: factor out copying PI from dif_storep to prot_sglist
scsi_debug: avo
On 09/18/2013 08:41 AM, Alireza Haghdoost wrote:
> Hi
>
> I am working on a high throughput and low latency application which
> does not tolerate block layer overhead to send IO request directly to
> fiber channel lower layer SCSI driver. I used to work with libaio but
> currently I am looking for
From: Mike Christie
If the queue is dying then we only call the rq->end_io callout.
This leaves bios setup on the request, because the caller assumes when
the blk_execute_rq_nowait/blk_execute_rq call has completed that
the rq->bios have been cleaned up.
This patch has blk_execute_rq_nowait use
On 09/18/2013 12:37 AM, Jayamohan Kallickal wrote:
> -Original Message-
> From: Mike Christie [mailto:micha...@cs.wisc.edu]
> Sent: Tuesday, September 17, 2013 2:16 PM
> To: Jayamohan Kallickal
> Cc: Jayamohan Kallickal; jbottom...@parallels.com;
> linux-scsi@vger.kernel.org; Sony John-N
On Di, 2013-09-17 at 13:30 -0700, Christoph Hellwig wrote:
> On Fri, Sep 13, 2013 at 01:27:12PM +0200, Gerd Hoffmann wrote:
> > Simplifies locking, we'll protect the list with the device spin lock.
> > Also plugs races which can happen when two devices operate on the
> > global list.
> >
> > While
Hi
I am working on a high throughput and low latency application which
does not tolerate block layer overhead to send IO request directly to
fiber channel lower layer SCSI driver. I used to work with libaio but
currently I am looking for a way to by pass the block layer and send
SCSI commands from
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