Re: [PATCH 0/15] copy offload patches

2015-12-15 Thread Martin K. Petersen
> "Mikulas" == Mikulas Patocka writes: Mikulas> Is there some software iSCSI implementation that supports Mikulas> token-based copy? So that I could try to make support for it. I did write support for token-based copy but it's in a different branch from the xcopy stuff. I will have to reconc

Re: [PATCH 0/15] copy offload patches

2015-12-14 Thread Douglas Gilbert
On 15-12-14 08:22 PM, Mikulas Patocka wrote: On Thu, 10 Dec 2015, Martin K. Petersen wrote: "Mikulas" == Mikulas Patocka writes: Mikulas, Mikulas> This patch series adds copy offload (the XCOPY command) to the Mikulas> block layer, SCSI subsystems and device mapper. Now that the VFS stuf

Re: [PATCH 0/15] copy offload patches

2015-12-14 Thread Mikulas Patocka
On Thu, 10 Dec 2015, Martin K. Petersen wrote: > > "Mikulas" == Mikulas Patocka writes: > > Mikulas, > > Mikulas> This patch series adds copy offload (the XCOPY command) to the > Mikulas> block layer, SCSI subsystems and device mapper. > > Now that the VFS stuff appears to stabilize I ag

Re: [dm-devel] [PATCH 0/15] copy offload patches

2015-12-11 Thread Christoph Hellwig
On Thu, Dec 10, 2015 at 11:06:04PM -0600, Mike Christie wrote: > > 2. Start REQ_OP_READ off at non-zero to try and shake out code that was > not converted. > > There are a several places where we assume reads are zero and writes are > 1 for things like indexing in arrays (like blktrace's ddir_act

Re: [dm-devel] [PATCH 0/15] copy offload patches

2015-12-10 Thread Mike Christie
On 12/10/2015 04:33 PM, Martin K. Petersen wrote: >> "Mikulas" == Mikulas Patocka writes: > > Mikulas, > > Mikulas> This patch series adds copy offload (the XCOPY command) to the > Mikulas> block layer, SCSI subsystems and device mapper. > > Now that the VFS stuff appears to stabilize I agr

Re: [PATCH 0/15] copy offload patches

2015-12-10 Thread Martin K. Petersen
> "Mikulas" == Mikulas Patocka writes: Mikulas, Mikulas> This patch series adds copy offload (the XCOPY command) to the Mikulas> block layer, SCSI subsystems and device mapper. Now that the VFS stuff appears to stabilize I agree it's a good time to revisit all this. I just merged the requir

[PATCH 0/15] copy offload patches

2015-12-10 Thread Mikulas Patocka
Hi This patch series adds copy offload (the XCOPY command) to the block layer, SCSI subsystems and device mapper. The principle of operation is this: We create two bios with REQ_COPY flag, one for read and one for write. The bios have no data pages and they both point to the same bio_copy str