Messages in this thread | | | Date | Fri, 09 May 2003 15:20:29 -0700 | From | Ulrich Drepper <> | Subject | Re: hammer: MAP_32BIT |
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H. Peter Anvin wrote: > On the other > hand, how big of a performance issue is it really to call mmap() again > in the failure scenario *only*?
Just look at the code, it's very expensive. In the moment the mmap code has to sequentially look at the VMAs in question. If it fails it means it walked the entire data structure without success. Ingo's patch does not address this, it just makes successful allocation usually fast again.
- -- - --------------. ,-. 444 Castro Street Ulrich Drepper \ ,-----------------' \ Mountain View, CA 94041 USA Red Hat `--' drepper at redhat.com `--------------------------- -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux)
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