Re: [Intel-gfx] [PATCH v9 6/6] drm/i915: Cache last IRQ seqno to reduce IRQ overhead

2016-06-16 Thread John Harrison
On 07/06/2016 13:47, Maarten Lankhorst wrote: Op 01-06-16 om 19:07 schreef john.c.harri...@intel.com: From: John Harrison The notify function can be called many times without the seqno changing. Some are to prevent races due to the requirement of not enabling interrupts until requested. Howeve

Re: [Intel-gfx] [PATCH v9 6/6] drm/i915: Cache last IRQ seqno to reduce IRQ overhead

2016-06-07 Thread Maarten Lankhorst
Op 01-06-16 om 19:07 schreef john.c.harri...@intel.com: > From: John Harrison > > The notify function can be called many times without the seqno > changing. Some are to prevent races due to the requirement of not > enabling interrupts until requested. However, when interrupts are > enabled the IRQ

[Intel-gfx] [PATCH v9 6/6] drm/i915: Cache last IRQ seqno to reduce IRQ overhead

2016-06-01 Thread John . C . Harrison
From: John Harrison The notify function can be called many times without the seqno changing. Some are to prevent races due to the requirement of not enabling interrupts until requested. However, when interrupts are enabled the IRQ handler can be called multiple times without the ring's seqno valu