how to flush out cache.?

[Steve Watt]

In article <Pine.BSF.4.21.0404211219460.31770-100000 at InterJet.elischer.org> you write:
>
>Ok so I have an application where I need to 
>reread a file I have just written to ensure that it went to disk
>correctly..
>
>Other than reading a few GB of data, is there a way to flush
>out the cache copy of a file I've written?

You can flush the file to disk with fsync().  But I don't think that
evicts the blocks from the cache, just forces them to be written.  To
the disk controller's cache, if you're lucky.

>possibilities include:
>
>a file flag saying "don't keep a copy after it's written to disk"?
>a syscall discard_cached_blocks(fd);
>
>
>?
>any other suggestions?

What are you hoping to accomplish?  There are probably other ways
to solve the larger problem.

-- 
Steve Watt KD6GGD  PP-ASEL-IA          ICBM: 121W 56' 57.8" / 37N 20' 14.9"
 Internet: steve @ Watt.COM                         Whois: SW32
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