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From:
kernelnewbies-bounce@xxxxxxxxxxxx [mailto:kernelnewbies-bounce@xxxxxxxxxxxx] On Behalf Of jiayinjia1983116 As
for as I know,when process/Thread is in runqueue,then may have allocate some
resource even they do not running right now,In order to keep the data
consistent(can not be modified by other processes/threads) ,we should
use spinlock to protect the data. [rajendra
stalekar] >
I think that the code protected by spinlock must never have a blocking call(eg.
copy_to_user, copy_from_user, read, write etc), whenever a thread acquires a
spinlock whatever the critical section code has to be asynchronous and yes of
course kernel must be pre-emptible.
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