UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

x86/oprofile: Add counter reservation check for virtual counters 

This patch adds a check for the availability of a counter. A virtual
counter is used only if its physical counter is not reserved.

Signed-off-by: Robert Richter <robert.richter@amd.com>
This commit is contained in:
Robert Richter 2009-07-10 18:15:21 +02:00
parent 61d149d524
commit 11be1a7b54
1 changed files with 1 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/oprofile/nmi_int.c
View File

@ -435,15 +435,13 @@ static int nmi_create_files(struct super_block *sb, struct dentry *root)
struct dentry *dir; struct dentry *dir;
char buf[4]; char buf[4];
#ifndef CONFIG_OPROFILE_EVENT_MULTIPLEX
/* quick little hack to _not_ expose a counter if it is not /* quick little hack to _not_ expose a counter if it is not
* available for use. This should protect userspace app. * available for use. This should protect userspace app.
* NOTE: assumes 1:1 mapping here (that counters are organized * NOTE: assumes 1:1 mapping here (that counters are organized
* sequentially in their struct assignment). * sequentially in their struct assignment).
*/ */
if (unlikely(!avail_to_resrv_perfctr_nmi_bit(i))) if (!avail_to_resrv_perfctr_nmi_bit(op_x86_virt_to_phys(i)))
continue; continue;
#endif /* CONFIG_OPROFILE_EVENT_MULTIPLEX */
snprintf(buf, sizeof(buf), "%d", i); snprintf(buf, sizeof(buf), "%d", i);
dir = oprofilefs_mkdir(sb, root, buf); dir = oprofilefs_mkdir(sb, root, buf);