Trond Myklebust wrote:
Yes. The RPC_TASK_QUEUED bit can only be cleared when both the
RPC_TASK_WAKEUP bit _and_ the queue spinlock are held.
If you are holding either one of those two, then it is safe to test for
RPC_IS_QUEUED(). If the latter is true, then it is also safe to
dereference the value of task->u.tk_wait.rpc_waitq.
Hmmm... With those constraints, it seems difficult to be able to modify
the current rpc_wake_up_task() function...
But, are you sure the patch you provided is sufficient to remove the
potential deadlock we faced ? I do not see how, could you explain ?
--
Aurelien Degremont
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
