Messages in this thread | | | Date | Sat, 23 Aug 2003 15:53:12 -0700 | From | "David S. Miller" <> | Subject | Re: [parisc-linux] Re: Problems with kernel mmap (failing tst-mmap-eofsync in glibc on parisc) |
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On 23 Aug 2003 17:21:21 -0500 James Bottomley <James.Bottomley@SteelEye.com> wrote:
> On Sat, 2003-08-23 at 16:43, David S. Miller wrote: > > On 22 Aug 2003 20:09:30 -0500 > > James Bottomley <James.Bottomley@SteelEye.com> wrote: > > > > > To avoid having to flush the non-shared mappings (basically on parisc if > > > you write to a file backing a MAP_PRIVATE mapping then we don't > > > guarantee you see the update).
BTW, what gains to you really get from this optimization?
How often do writes happen to files while private mappings to it exist? :-) This is one of the reasons I think this discussion is a bit silly.
What specific cases does your optimization help, and how common is it? Show us some numbers.
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