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DateFri, 12 Jan 2007 15:30:49 +1100
FromNick Piggin <>
SubjectRe: O_DIRECT question
Bill Davidsen wrote:
> Nick Piggin wrote:
> 
>> Aubrey wrote:
>>
>> Exactly, and the *real* fix is to modify userspace not to make > 
>> PAGE_SIZE
>> mallocs[*] if it is to be nommu friendly. It is the kernel hacks to do 
>> things
>> like limit cache size that are the bandaids.
> 
> 
> Tuning the system to work appropriately for a given load is not a 
> band-aid.

We are talking about about fragmentation. And limiting pagecache to try to
avoid fragmentation is a bandaid, especially when the problem can be solved
(not just papered over, but solved) in userspace.

-- 
SUSE Labs, Novell Inc.
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