Re: [Patch] Hashed map lookup.

Thomas Hellström Mon, 10 Jul 2006 06:16:05 -0700

Dave Airlie wrote:

I'd like to bring in the hashed map lookup from the drm-ttm-branch to CVS. It 
changes the drmmap() map lookup from a linked list search to a hash lookup.


This means that the user_token that identifies the map in user space becomes 
an arbitrary hash key in the range 0x10000000 to 0x90000000 with page-size 
increments.


We fixed a few of these for 64-bit at one stage, I was tempted to make all 
handles hashed on 32 or 64 bit systems to flush these out..

Dave.

I just did this and fixed the SiS and Unichrome 3D drivers, bumping their
drm device driver majors. The fixes tend to be very small. The intel drivers
should also be OK.

I tagged the drm

"drm-before-handle-change"

before doing this, in case we need to revert this commit.
Let's see what happens.

/Thomas

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Re: [Patch] Hashed map lookup.

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