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authorHuang, Xiaolan <xiaolan.huang@intel.com>2008-05-15 10:18:41 +0800
committerTony Luck <tony.luck@intel.com>2008-05-15 09:54:19 -0700
commit839052d27e8db0c1545256fe5827abcd00fb51c5 (patch)
tree003839d444943ba8f125846e776b068721da2c8f /Documentation
parent3fb2c74ee20b77affd494c6b8ce7928d0ebbb62e (diff)
[IA64] fix personality(PER_LINUX32) performance issue
The patch aims to fix a performance issue for the syscall personality(PER_LINUX32). On IA-64 box, the syscall personality (PER_LINUX32) has poor performance because it failed to find the Linux/x86 execution domain. Then it tried to load the kernel module however it failed always and it used the default execution domain PER_LINUX instead. Requesting kernel modules is very expensive. It caused the performance issue. (see the function lookup_exec_domain in kernel/exec_domain.c). To resolve the issue, execution domain Linux/x86 is always registered in initialization time for IA-64 architecture. Signed-off-by: Xiaolan Huang <xiaolan.huang@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
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