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This is about Asynchronous Notification capability in
drivers. Can someone tell me the use of ‘magic’ element
in ‘fasync_struct’ ? Link: http://lxr.linux.no/source/include/linux/fs.h?v=2.4.21#L639 Also one suggestion about ‘fasync_helper()’
function. In this function, it would better if we can place the first ‘if’
condition after the ‘for’ loop, it will increase the performance. In
‘for’ loop we are searching the ‘fasync_struct’ list,
if we are able to find the element in that list we need not to allocate a new ‘fasync_struct’,
which will avoid the extra overhead of first allocating and then de-allocating the
new structure. We should allocate new structure only if we are not able to find
the element in the already maintained list of ‘fasync_struct’
structures. Link: http://lxr.linux.no/source/fs/fcntl.c?v=2.4.21#L465 Regards, Gaurav |
