Re: [PATCH 00/33] SG table chaining support

2007-07-16 Thread Jens Axboe
On Mon, Jul 16 2007, Kai Makisara wrote: > On Mon, 16 Jul 2007, Martin K. Petersen wrote: > > > > "John" == John Stoffel <[EMAIL PROTECTED]> writes: > > > > John> Will this help out tape drive performance at all? I looked > > John> through the patches quickly, esp the AIC7xxx stuff since tha

Re: [PATCH 00/33] SG table chaining support

2007-07-16 Thread Kai Makisara
On Mon, 16 Jul 2007, Martin K. Petersen wrote: > > "John" == John Stoffel <[EMAIL PROTECTED]> writes: > > John> Will this help out tape drive performance at all? I looked > John> through the patches quickly, esp the AIC7xxx stuff since that's > John> what I use, but nothing jumped out at me.

Re: [PATCH 00/33] SG table chaining support

2007-07-16 Thread Jens Axboe
On Mon, Jul 16 2007, Martin K. Petersen wrote: > > "John" == John Stoffel <[EMAIL PROTECTED]> writes: > > John> Will this help out tape drive performance at all? I looked > John> through the patches quickly, esp the AIC7xxx stuff since that's > John> what I use, but nothing jumped out at me..

Re: [PATCH 00/33] SG table chaining support

2007-07-16 Thread Martin K. Petersen
> "John" == John Stoffel <[EMAIL PROTECTED]> writes: John> Will this help out tape drive performance at all? I looked John> through the patches quickly, esp the AIC7xxx stuff since that's John> what I use, but nothing jumped out at me... Yes. Most modern tape drives want a block size of 1MB

Re: [PATCH 00/33] SG table chaining support

2007-07-16 Thread John Stoffel
Jens> A repost of this patchset, which adds support forchaining of sg Jens> tables. This enables much larger IO commands, since we don't Jens> have to allocate large consecutive pieces of memory to represent Jens> the sgtable of a huge command. Right now Linux is limited to Jens> somewhere betwee

Re: [PATCH 00/33] SG table chaining support

2007-07-16 Thread FUJITA Tomonori
From: Jens Axboe <[EMAIL PROTECTED]> Subject: [PATCH 00/33] SG table chaining support Date: Mon, 16 Jul 2007 11:47:14 +0200 > Changes since last post: > > - Rebase to current -git. Lots of SCSI drivers have been converted > to use the sg accessor helpers, which nicely shr

Re: [PATCH 00/33] SG table chaining support

2007-07-16 Thread FUJITA Tomonori
From: Jens Axboe <[EMAIL PROTECTED]> Subject: [PATCH 00/33] SG table chaining support Date: Mon, 16 Jul 2007 11:47:14 +0200 > Changes since last post: > > - Rebase to current -git. Lots of SCSI drivers have been converted > to use the sg accessor helpers, which nicely shr

Re: [PATCH 00/33] SG table chaining support

2007-07-16 Thread Jens Axboe
On Mon, Jul 16 2007, FUJITA Tomonori wrote: > From: Jens Axboe <[EMAIL PROTECTED]> > Subject: [PATCH 00/33] SG table chaining support > Date: Mon, 16 Jul 2007 11:47:14 +0200 > > > Changes since last post: > > > > - Rebase to current -git. Lots of SCSI drivers

Re: [PATCH 00/33] SG table chaining support

2007-07-16 Thread Jens Axboe
On Mon, Jul 16 2007, FUJITA Tomonori wrote: > From: Jens Axboe <[EMAIL PROTECTED]> > Subject: [PATCH 00/33] SG table chaining support > Date: Mon, 16 Jul 2007 11:47:14 +0200 > > > Changes since last post: > > > > - Rebase to current -git. Lots of SCSI drivers

[PATCH 00/33] SG table chaining support

2007-07-16 Thread Jens Axboe
Hi, A repost of this patchset, which adds support forchaining of sg tables. This enables much larger IO commands, since we don't have to allocate large consecutive pieces of memory to represent the sgtable of a huge command. Right now Linux is limited to somewhere between 128 and 256 segments, dep