Bug 182080 - 2GB as swap partition's size limit for FC4 i386/x86_64?
2GB as swap partition's size limit for FC4 i386/x86_64?
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Dave Jones
Brian Brock
Depends On:
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Reported: 2006-02-20 03:46 EST by Robinson Tiemuqinke
Modified: 2015-01-04 17:25 EST (History)
3 users (show)

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Last Closed: 2006-02-27 00:17:30 EST
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Description Robinson Tiemuqinke 2006-02-20 03:46:18 EST
Description of problem:
What's the size limit for a swap partition for FC4? Is the 2GB limit useful 
size per swap partition still in effect or not? from mkswap manual it says 
that the limit is lift off. But really need to confirm that for i386 arch.

And for x86_64 arch, what's the maximum useful size per swap area?

The following is cut from mkswap manual:

The maximum useful size of a swap area depends on the architecture and kernel  
version.   It  is  roughly 2GiB  on  i386,  PPC,  m68k, ARM, 1GiB on sparc, 
512MiB on mips, 128GiB on alpha and 3TiB on sparc64. For kernels after 2.3.3 
there is no that limitation.

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Comment 1 Karel Zak 2006-02-20 09:27:20 EST
It's more than 2GB for i386 and x86_64. I think the real limit is max size of
block device (probably 32bit - 16Tb, 64bit - 8Exabyte).

Reassingning to kernel team -- maybe they know more exact numbers.
Comment 2 Dave Jones 2006-02-27 00:17:30 EST
iirc, you can have up to 32 64GB swaps active at the same time.
Posting such questions to linux-kernel is a better bet for such queries.
Bugzilla is for tracking bugs.

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