Since the max read size of FUSE is 128KB in default, the socket header
of the appfuse epollcontroller is allocated in order 4 (64KB). When
memory environment is in insufficient situation that has a lot of
fragment, order 4 size memory allication is impossible, so more than
several tens of seconds could take to allocate the socket header.
To prevent the issue, limit the fuse read size to 64KB, so that the
memory allocation order of the socket header is changed to order 2.
Bug: 312503249
Test: atest AppFusePerfTest
Change-Id: I7020801b7539d980515885396916f8be1f1008e9
We'd previously call ForceUnmount after the call to PrepareDir,
which would sometimes fail because the userspace counterpart of a
FUSE FS that was previously mounted at that mountpoint has gone
away. This is usually reproducible after a runtime restart.
Bug: 128459728
Test: Loop (adb shell start; atest MediaStore_Images_MediaTest; adb shell stop;)
Change-Id: I38d3908487123614c338266f983afb04e3ed78d4
