Re: [PATCH v3 66/77] ncr5380: Fix soft lockups

I'd like to think that, too - probably true for the Atari TT SCSI case (can do scatter-gather, can do more than one command per LUN). Worse for the Falcon SCSI which is the only one I can test (no scatter-gather, one command per LUN, interrupt shared with IDE and IDE driver locked out while SCSI

Re: [PATCH v3 66/77] ncr5380: Fix soft lockups

On Tue, 22 Dec 2015, One Thousand Gnomes wrote: > On Tue, 22 Dec 2015 12:18:44 +1100 Finn Thain > wrote: > > > Because of the rudimentary design of the chip, it is necessary to poll > > the SCSI bus signals during PIO and this tends to hog the CPU. The > > driver will accept new commands

Re: [PATCH v3 66/77] ncr5380: Fix soft lockups

On Tue, 22 Dec 2015 12:18:44 +1100 Finn Thain wrote: > Because of the rudimentary design of the chip, it is necessary to poll the > SCSI bus signals during PIO and this tends to hog the CPU. The driver will > accept new commands while others execute, and this causes a soft lockup > because the

Re: [PATCH v3 66/77] ncr5380: Fix soft lockups

On 12/22/2015 02:18 AM, Finn Thain wrote: Because of the rudimentary design of the chip, it is necessary to poll the SCSI bus signals during PIO and this tends to hog the CPU. The driver will accept new commands while others execute, and this causes a soft lockup because the workqueue item will

Re: [PATCH v3 66/77] ncr5380: Fix soft lockups

I'd like to think that, too - probably true for the Atari TT SCSI case (can do scatter-gather, can do more than one command per LUN). Worse for the Falcon SCSI which is the only one I can test (no scatter-gather, one command per LUN, interrupt shared with IDE and IDE driver locked out while SCSI

Re: [PATCH v3 66/77] ncr5380: Fix soft lockups

On 12/22/2015 02:18 AM, Finn Thain wrote: Because of the rudimentary design of the chip, it is necessary to poll the SCSI bus signals during PIO and this tends to hog the CPU. The driver will accept new commands while others execute, and this causes a soft lockup because the workqueue item will

Re: [PATCH v3 66/77] ncr5380: Fix soft lockups

On Tue, 22 Dec 2015 12:18:44 +1100 Finn Thain wrote: > Because of the rudimentary design of the chip, it is necessary to poll the > SCSI bus signals during PIO and this tends to hog the CPU. The driver will > accept new commands while others execute, and this causes a

Re: [PATCH v3 66/77] ncr5380: Fix soft lockups

On Tue, 22 Dec 2015, One Thousand Gnomes wrote: > On Tue, 22 Dec 2015 12:18:44 +1100 Finn Thain > wrote: > > > Because of the rudimentary design of the chip, it is necessary to poll > > the SCSI bus signals during PIO and this tends to hog the CPU. The > > driver

[PATCH v3 66/77] ncr5380: Fix soft lockups

Because of the rudimentary design of the chip, it is necessary to poll the SCSI bus signals during PIO and this tends to hog the CPU. The driver will accept new commands while others execute, and this causes a soft lockup because the workqueue item will not terminate until the issue queue is

[PATCH v3 66/77] ncr5380: Fix soft lockups

Because of the rudimentary design of the chip, it is necessary to poll the SCSI bus signals during PIO and this tends to hog the CPU. The driver will accept new commands while others execute, and this causes a soft lockup because the workqueue item will not terminate until the issue queue is