[Cbe-oss-dev] Hard crash on fb write past 17MB
macton at cellperformance.com
Tue Dec 19 22:08:15 EST 2006
Having a problem which causes a hard crash of the OS:
I can mmap 18MB from /dev/fb0 (whatever configuration: 1MB x 18, 18MB
x 1, etc.) without errors. (Trying to map more than 18MB is rejected
Writing in the range 0-17MB causes no problems.
Writing to the range 17-18MB causes the system to stop without any
Reading the range 0-18MB cases no problems.
I have a small test program which demonstrates the problem:
To compile: gcc -std=c99 test_fb_alloc.c -o test_fb_alloc
[It will prompt before the offending bit to give you a chance to skip it.]
This is on YDL5 for PS3 with kernel 2.6.16
Anyone have an idea?
PS: Did anyone notice that in Sony's vsync sample, mmap is being
checked for NULL instead of MAP_FAILED? mmap does seem to properly
return MAP_FAILED, so I expect this is just a typo in the sample.
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