Devices

Timestamp:

Apr 7, 2009 10:44:38 PM (16 years ago)

Author:

vboxsync

Message:

DevE1000: corrected comment, the EMT involvment in PhysWrite happens only once in a while.

File:

trunk/src/VBox/Devices/Network/DevE1000.cpp

-              r18834
+              r18841
             //desc.status.fTCPE  = false;
             /*
+             * We need to leave Rx critical section here, otherwise it will block EMT if
+             * it happens to enter e1kRegWriteRDT() while we storing the fragment. This
+             * will lead to a deadlock as writing to guest memory waits for EMT to hangle
+             * the request.
+             * We need to leave Rx critical section here or we risk deadlocking
+             * with EMT in e1kRegWriteRDT when the write is to an unallocated
+             * page or has an access handler associated with it.
              * Note that it is safe to leave the critical section here since e1kRegWriteRDT()
              * modifies RDT only.

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