[SCM] Samba Shared Repository - branch v3-0-test updated - release-3-0-32-11-g0b39c04

Jeremy Allison jra at samba.org
Thu Sep 4 16:56:31 GMT 2008

On Thu, Sep 04, 2008 at 03:48:11PM +1000, tridge at samba.org wrote:
> Hi Simo,
>  > Please revert this change immediately. That change would slow down tdb
>  > by a couple of orders or magnitude for our temporary databases.
> actually this will only slow us down each time we attach/detach to the
> tdb or we expand it (as expand uses munmap/mmap). I guess the question
> is how often we expand our temporary tdb's.
> A simple change would be for this not to apply if TDB_CLEAR_IF_FIRST
> is set.

What about changing the MS_SYNC flag in the msync call to MS_ASYNC
instead ? That would seem to have the desired effect in that it
satifies the (seeming) requirement that msync be called before 
munmap, but won't block until all writes are finished.


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