Contributors: 14
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Akinobu Mita |
161 |
57.71% |
4 |
19.05% |
| Dmitriy Monakhov |
33 |
11.83% |
1 |
4.76% |
| Jesper Dangaard Brouer |
22 |
7.89% |
1 |
4.76% |
| Qi Zheng |
19 |
6.81% |
2 |
9.52% |
| Vlastimil Babka |
18 |
6.45% |
1 |
4.76% |
| Christoph Lameter |
6 |
2.15% |
2 |
9.52% |
| Mel Gorman |
4 |
1.43% |
1 |
4.76% |
| Viresh Kumar |
4 |
1.43% |
1 |
4.76% |
| Greg Kroah-Hartman |
3 |
1.08% |
2 |
9.52% |
| KP Singh |
3 |
1.08% |
1 |
4.76% |
| Linus Torvalds (pre-git) |
3 |
1.08% |
2 |
9.52% |
| Joe Perches |
1 |
0.36% |
1 |
4.76% |
| Al Viro |
1 |
0.36% |
1 |
4.76% |
| Nicolas Boichat |
1 |
0.36% |
1 |
4.76% |
| Total |
279 |
|
21 |
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/fault-inject.h>
#include <linux/error-injection.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include "slab.h"
static struct {
struct fault_attr attr;
bool ignore_gfp_reclaim;
bool cache_filter;
} failslab = {
.attr = FAULT_ATTR_INITIALIZER,
.ignore_gfp_reclaim = true,
.cache_filter = false,
};
int should_failslab(struct kmem_cache *s, gfp_t gfpflags)
{
int flags = 0;
/* No fault-injection for bootstrap cache */
if (unlikely(s == kmem_cache))
return 0;
if (gfpflags & __GFP_NOFAIL)
return 0;
if (failslab.ignore_gfp_reclaim &&
(gfpflags & __GFP_DIRECT_RECLAIM))
return 0;
if (failslab.cache_filter && !(s->flags & SLAB_FAILSLAB))
return 0;
/*
* In some cases, it expects to specify __GFP_NOWARN
* to avoid printing any information(not just a warning),
* thus avoiding deadlocks. See commit 6b9dbedbe349 for
* details.
*/
if (gfpflags & __GFP_NOWARN)
flags |= FAULT_NOWARN;
return should_fail_ex(&failslab.attr, s->object_size, flags) ? -ENOMEM : 0;
}
ALLOW_ERROR_INJECTION(should_failslab, ERRNO);
static int __init setup_failslab(char *str)
{
return setup_fault_attr(&failslab.attr, str);
}
__setup("failslab=", setup_failslab);
#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
static int __init failslab_debugfs_init(void)
{
struct dentry *dir;
umode_t mode = S_IFREG | 0600;
dir = fault_create_debugfs_attr("failslab", NULL, &failslab.attr);
if (IS_ERR(dir))
return PTR_ERR(dir);
debugfs_create_bool("ignore-gfp-wait", mode, dir,
&failslab.ignore_gfp_reclaim);
debugfs_create_bool("cache-filter", mode, dir,
&failslab.cache_filter);
return 0;
}
late_initcall(failslab_debugfs_init);
#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */