Hi!
On 10:55 Wed 30 Jun , nidhi mittal hada wrote:
> There are two types of function calls , blocking and non blocking ,
> blocking --in whihc we might sleep for some processing ,
> Non blocking -- we will prefer to return from function instead of sleeping
> Now
No, blocking/nonblocking has *nothing* to do with when data hits the disk. It
is about what you want the kernel to do, if it has to wait, because buffers
are either full or empty.
- blocking: wait until some data could be read/written
- non-blocking: return immediately without having done anything and let
userspace do something else in the meantime; This can be used together with
select() or epoll() to efficiently handle a lot of file descriptors with a
single thread.
> write function comes under first category --
> and we will sleep till data is written to target block device.
No, both read and write can be put in blocking and non-blocking mode.
-Michi
--
programing a layer 3+4 network protocol for mesh networks
see http://michaelblizek.twilightparadox.com
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