GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-27 17:11:46 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

x86_64 syscall audit fast-path

Browse source 
This adds a fast path for 64-bit syscall entry and exit when
TIF_SYSCALL_AUDIT is set, but no other kind of syscall tracing.
This path does not need to save and restore all registers as
the general case of tracing does.  Avoiding the iret return path
when syscall audit is enabled helps performance a lot.

Signed-off-by: Roland McGrath <roland@redhat.com>
This commit is contained in:
Roland McGrath 2008-06-23 15:37:04 -07:00
parent 15e8f348db
commit 86a1c34a92
2 changed files with 50 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

3
kernel/auditsc.c
View file

@ -1476,7 +1476,8 @@ void audit_syscall_entry(int arch, int major,
struct audit_context *context = tsk->audit_context;
enum audit_state state;
BUG_ON(!context);
if (unlikely(!context))
return;
/*
* This happens only on certain architectures that make system