Re: Process Scheduling Issue using sg/libata

2007-11-17 Thread Fajun Chen
On 11/17/07, Mark Lord <[EMAIL PROTECTED]> wrote: > Fajun Chen wrote: > > On 11/17/07, Mark Lord <[EMAIL PROTECTED]> wrote: > >> Fajun Chen wrote: > >>> On 11/16/07, Mark Lord <[EMAIL PROTECTED]> wrote: > Fajun Chen wrote: > .. > >>> This problem also happens with R/W DMA ops. Below are simpli

Re: Process Scheduling Issue using sg/libata

2007-11-17 Thread Mark Lord
Fajun Chen wrote: On 11/17/07, Mark Lord <[EMAIL PROTECTED]> wrote: Fajun Chen wrote: On 11/16/07, Mark Lord <[EMAIL PROTECTED]> wrote: Fajun Chen wrote: .. This problem also happens with R/W DMA ops. Below are simplified code snippets: // Open one sg device for read if ((sg_fd =

Re: Process Scheduling Issue using sg/libata

2007-11-17 Thread Fajun Chen
On 11/17/07, James Chapman <[EMAIL PROTECTED]> wrote: > Fajun Chen wrote: > > On 11/16/07, Tejun Heo <[EMAIL PROTECTED]> wrote: > >> Fajun Chen wrote: > >>> I use sg/libata and ata pass through for read/writes. Linux 2.6.18-rc2 > >>> and libata version 2.00 are loaded on ARM XScale board. Under he

Re: Process Scheduling Issue using sg/libata

2007-11-17 Thread Fajun Chen
On 11/17/07, Mark Lord <[EMAIL PROTECTED]> wrote: > Fajun Chen wrote: > > On 11/16/07, Mark Lord <[EMAIL PROTECTED]> wrote: > >> Fajun Chen wrote: > >>> Hi All, > >>> > >>> I use sg/libata and ata pass through for read/writes. Linux 2.6.18-rc2 > >>> and libata version 2.00 are loaded on ARM XScale

Re: Process Scheduling Issue using sg/libata

2007-11-17 Thread James Chapman
Fajun Chen wrote: > On 11/16/07, Tejun Heo <[EMAIL PROTECTED]> wrote: >> Fajun Chen wrote: >>> I use sg/libata and ata pass through for read/writes. Linux 2.6.18-rc2 >>> and libata version 2.00 are loaded on ARM XScale board. Under heavy >>> cpu load (e.g. when blocks per transfer/sector count is

Re: Process Scheduling Issue using sg/libata

2007-11-17 Thread Mark Lord
Fajun Chen wrote: On 11/16/07, Mark Lord <[EMAIL PROTECTED]> wrote: Fajun Chen wrote: Hi All, I use sg/libata and ata pass through for read/writes. Linux 2.6.18-rc2 and libata version 2.00 are loaded on ARM XScale board. Under heavy cpu load (e.g. when blocks per transfer/sector count is set

Hotplugging U160 disks on a Fast-40 sym53c8xx

2007-11-17 Thread Grzegorz Nosek
Hi all, I have a problem with hotplugging hard disks to an old Compaq ProLiant 360 with the following SCSI controllers: 00:01.0 SCSI storage controller: LSI Logic / Symbios Logic 53c1510 (rev 02) 00:01.1 SCSI storage controller: LSI Logic / Symbios Logic 53c1510 (rev 02) (without the SmartArray