On Tuesday 28 August 2001 20:28, you wrote:
> No they don't. NBD moves the requests to an internal queue when the
> request function is run. The function does not block. The internal
> queue is later emptied by another means, in another context.
ok - does
result = sock_sendmsg(sock, &msg, size);
block? something in the back of my brains sais yes, but i might be
wrong since i'm new to linux kernel programing. if it does block
nbd blocks. it realeases the io_request_lock lock and calls
nbd_send_req which calls nbd_xmit and that results in a call to
sock_sendmst.
in the documention ob the brbd it sais: that the request function
is allways called in the context of a process doing I/O the kflushd
or the kupdate kernel thread.
-
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This archive was generated by hypermail 2b29 : Fri Aug 31 2001 - 21:00:30 EST