usage of max_sectors in scsi_host_template

I'm not sure that I understand the meaning of max_sectors in scsi_host_template. Is it the maximum data length of a single SCSI command? Is it in bytes? What's the size of a sector? Thanks, -- ____ Erez Zilber | 972-

Re: usage of max_sectors in scsi_host_template

Stefan Richter wrote: Erez Zilber wrote: > I'm not sure that I understand the meaning of max_sectors in > scsi_host_template. Did you have a look at scsi_mid_low_api.txt? http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=Documentation/scsi/scsi_mid_lo

Re: Performance of SCST versus STGT

FUJITA Tomonori wrote: > On Thu, 17 Jan 2008 12:48:28 +0300 > Vladislav Bolkhovitin <[EMAIL PROTECTED]> wrote: > > >> FUJITA Tomonori wrote: >> >>> On Thu, 17 Jan 2008 10:27:08 +0100 >>> "Bart Van Assche" <[EMAIL PROTECTED]> wrote: >>> >>> >>> Hello, I have performed a

Re: Performance of SCST versus STGT

>> We didn't run any real performance test with tgt, so I don't have >> numbers yet. I know that Pete got ~900 MB/sec by hacking sgp_dd, so all >> data was read/written to the same block (so it was all done in the >> cache). Pete - am I right? >> >> As already mentioned, he got that with IB SDR ca

[PATCH] IB/iSER: add logical unit reset support

eh_device_reset_handler was already added to scsi_host_template in iscsi_tcp, and is now added also for iscsi_iser. Signed-off-by: Erez Zilber <[EMAIL PROTECTED]> Signed-off-by: Mike Christie <[EMAIL PROTECTED]> --- drivers/infiniband/ulp/iser/iscsi_iser.c |1 + 1 files changed,

Re: Integration of SCST in the mainstream Linux kernel

Bart Van Assche wrote: > On Jan 30, 2008 12:32 AM, FUJITA Tomonori <[EMAIL PROTECTED]> wrote: > >> iSER has parameters to limit the maximum size of RDMA (it needs to >> repeat RDMA with a poor configuration)? >> > > Please specify which parameters you are referring to. As you know I > had a

Re: Integration of SCST in the mainstream Linux kernel

Bart Van Assche wrote: > As you probably know there is a trend in enterprise computing towards > networked storage. This is illustrated by the emergence during the > past few years of standards like SRP (SCSI RDMA Protocol), iSCSI > (Internet SCSI) and iSER (iSCSI Extensions for RDMA). Two differen

Re: [PATCH 2/2] iscsi_iser: convert to use the data buffer accessors

FUJITA Tomonori wrote: > > iscsi_iser: convert to use the data buffer accessors > > - remove the unnecessary map_single path. > > - convert to use the new accessors for the sg lists and the > parameters. > > TODO: use scsi_for_each_sg(). > > Signed-off-by: FUJITA Tomonori <[EMAIL PROTECTED]> > ---

Re: Integration of SCST in the mainstream Linux kernel

Bart Van Assche wrote: > On Feb 5, 2008 6:01 PM, Erez Zilber <[EMAIL PROTECTED]> wrote: > >> Using such large values for FirstBurstLength will give you poor >> performance numbers for WRITE commands (with iSER). FirstBurstLength >> means how much data should you

Re: Integration of SCST in the mainstream Linux kernel

Bart Van Assche wrote: > On Feb 18, 2008 10:43 AM, Erez Zilber <[EMAIL PROTECTED]> wrote: > >> If you use a high value for FirstBurstLength, all (or most) of your data >> will be sent as unsolicited data-out PDUs. These PDUs don't use the RDMA >> engi