TIP 105# : ACFS and bugs

In Oracle Grid Infrastructure 11g Release 2, Oracle extends the capability of ASM by introducing the ASM
Cluster Filesystem, or ACFS. In other words, Oracle ASM 11g Release 2 has capability to the manage all data, including Oracle database files, Oracle Clusterware files and non-structured, general-purpose data such as log files and text files. This sounds amazing, however in my last experience with ACFS on 112034 on Linux 64bit, I found pretty nasty bugs which I think worth sharing.
Bug Workaround Bug No
Copy( cp) Performance On ACFS  Do not use ls while cp is running 
Wait for 11204
ls -l' and 'find' Commands Slow on ACFS No workaround - Wait for 11204 10418517