utils/irqbalance/patches/0001-post-190-fix-get-irq-module.patch

   1 From ff48ac9c84f0b318dfce665605d72e86dfcfe008 Mon Sep 17 00:00:00 2001
   2 From: Chao Liu <liuchao173@huawei.com>
   3 Date: Tue, 7 Jun 2022 15:15:15 +0800
   4 Subject: [PATCH] get irq->module relationship from /sys/bus/pci/*/driver
   5
   6 Signed-off-by: Chao Liu <liuchao173@huawei.com>
   7 ---
   8  classify.c | 19 +++++++++++++++++--
   9  1 file changed, 17 insertions(+), 2 deletions(-)
  10
  11 --- a/classify.c
  12 +++ b/classify.c
  13 @@ -7,6 +7,7 @@
  14  #include <dirent.h>
  15  #include <assert.h>
  16  #include <errno.h>
  17 +#include <libgen.h>
  18
  19  #include "irqbalance.h"
  20  #include "types.h"
  21 @@ -578,7 +579,7 @@ static int check_for_module_ban(char *na
  22                 return 0;
  23  }
  24
  25 -static int check_for_irq_ban(int irq, GList *proc_interrupts)
  26 +static int check_for_irq_ban(int irq, char *mod, GList *proc_interrupts)
  27  {
  28         struct irq_info find, *res;
  29         GList *entry;
  30 @@ -594,6 +595,9 @@ static int check_for_irq_ban(int irq, GL
  31         /*
  32          * Check to see if we banned module which the irq belongs to.
  33          */
  34 +       if (mod != NULL && strlen(mod) > 0 && check_for_module_ban(mod))
  35 +               return 1;
  36 +
  37         entry = g_list_find_custom(proc_interrupts, &find, compare_ints);
  38         if (entry) {
  39                 res = entry->data;
  40 @@ -609,14 +613,25 @@ static void add_new_irq(char *path, stru
  41         struct irq_info *new;
  42         struct user_irq_policy pol;
  43         int irq = hint->irq;
  44 +       char buf[PATH_MAX], drvpath[PATH_MAX];
  45 +       char *mod = NULL;
  46 +       int ret;
  47
  48         new = get_irq_info(irq);
  49         if (new)
  50                 return;
  51
  52 +       if (path) {
  53 +               sprintf(buf, "%s/driver", path);
  54 +               ret = readlink(buf, drvpath, PATH_MAX);
  55 +               if (ret > 0 && ret < PATH_MAX) {
  56 +                       drvpath[ret] = '\0';
  57 +                       mod = basename(drvpath);
  58 +               }
  59 +       }
  60         /* Set NULL devpath for the irq has no sysfs entries */
  61         get_irq_user_policy(path, irq, &pol);
  62 -       if ((pol.ban == 1) || check_for_irq_ban(irq, proc_interrupts)) { /*FIXME*/
  63 +       if ((pol.ban == 1) || check_for_irq_ban(irq, mod, proc_interrupts)) { /*FIXME*/
  64                 __add_banned_irq(irq, &banned_irqs);
  65                 new = get_irq_info(irq);
  66         } else