Messages in this thread | | | Date | Wed, 16 Dec 1998 15:06:48 +0200 | From | Petko Manolov <> | Subject | Re: pgcc optimizationss |
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Alan Cox wrote:
> Well 2.1.x seems to be ok with egcs, and egcs current + the assembler > patches Bernd and co have provided should be rock safe. Having said that > you don't want to use -O6 with the kernel. -O6 says "please go around and > inline things as you feel". The kernel authors have already done that and > made a better job of it than the compiler will
True, but -O6 enables a lot of optimization that -O2 didn't. I prefer -O6 -fno-inline-functions (i don't like wild inlining too). Sadly this is broken in egcs/pgcc. I compiled stock 2.1.131 with pgcc-2.91.60 (egcs-1.1.1) and i'm using the kernel from a week without a crash (-O6 used). But when tried with -fno-inline-functions the kernel boots but when i try to login it oopses hard (scheduling in interrupt). I think this is a compiler problem. -O2 is quite stable since 1.0.1
regards
PS: Marc, is there some inline asm changes/fixes in pgcc/egcs-1.1.1. compared with pgcc/egcs-1.1? -- Petko Manolov - petkan@varel.bg http://www.varel.bg/~petkan/
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