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 <TITLE>buffer cache/chunk cache (cont’)</TITLE> 
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 <H1>buffer cache/chunk cache (cont’)</H1> 
 <P><UL>
<LI><H2>xfs_write gets “chunk” to write
</H2>
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<LI> chunk may already exist and have disk blocks
<LI> chunk may be “delayed allocate”
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<LI><H2>daemons that write buffers:
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<LI>bdflush flushes dirty buffers (calls xfs_strategy)
<LI>xfsd flushes buffers which need allocation
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<LI><H2>xfs_strategy called to write buffer
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<LI> queues for xfsd if allocation needed
<LI> writes buffer with disk storage</UL></UL></P>
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