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Re: comparing file contents in is_exact_match?

From
GBGeert Bosch <bosch@adacore.com>
Date
Jul 17, 2006, 19:37 UTC
Message-ID
<1F90D448-5347-4CEB-80DE-3CC86C1CC16F@adacore.com>
In-Reply-To
<Pine.LNX.4.63.0607171804030.29667@wbgn013.biozentrum.uni-wuerzburg.de>
On Jul 17, 2006, at 12:05, Johannes Schindelin wrote:
Show 13 quoted lines
>> Not for pack-files, though. You may have a half-gigabyte pack- 
>> file, and
>> only use a small small fraction of it.
>
> Right.
>
>> (You also never really rename them, so windows should be fine for  
>> that
>> case)
>
> So we could introduce a second mmap() which is normally the same as
> mmap(), except for windows, where it is a rename() and unlink() safe
> version of mmap() by reading the thing into RAM. Not very pretty.

Or we can avoid doing an mmap of the entire pack file, and instead try to be somewhat smart on limiting the size of the mmap's. This might be sufficient to help Windows and also solve the issue of finding contiguous address space for large packs on 32-bit systems.

   -Geert
Previous: Alex RiesenNext: Linus Torvalds
Message 20 of 32 in “comparing file contents in is_exact_match?”
  1. Martin WaitzJul 6, 2006
  2. Junio C HamanoJul 6, 2006
  3. Martin WaitzJul 6, 2006
  4. Junio C HamanoJul 6, 2006
  5. Martin WaitzJul 6, 2006
  6. Martin WaitzJul 6, 2006
  7. Florian WeimerJul 7, 2006
  8. Johannes SchindelinJul 8, 2006
  9. Florian WeimerJul 16, 2006
  10. Johannes SchindelinJul 16, 2006
  11. Yakov LernerJul 16, 2006
  12. Alex RiesenJul 16, 2006
  13. Florian WeimerJul 17, 2006
  14. Johannes SchindelinJul 17, 2006
  15. Linus TorvaldsJul 17, 2006
  16. Johannes SchindelinJul 17, 2006
  17. Linus TorvaldsJul 17, 2006
  18. Martin WaitzJul 17, 2006
  19. Alex RiesenJul 17, 2006
  20. Geert BoschJul 17, 2006
  21. Linus TorvaldsJul 17, 2006
  22. Yakov LernerJul 18, 2006
  23. Johannes SchindelinJul 18, 2006
  24. Linus TorvaldsJul 18, 2006
  25. Alex RiesenJul 18, 2006
  26. Juergen RuehleJul 17, 2006
  27. Johannes SchindelinJul 17, 2006
  28. Juergen RuehleJul 17, 2006
  29. Yakov LernerJul 17, 2006
  30. Juergen RuehleJul 17, 2006
  31. Yakov LernerJul 18, 2006
  32. Yakov LernerJul 17, 2006

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