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ANDROID: vendor_hooks: Add hooks to extend the struct swap_info_struct

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Two vendor hooks are added to extend the struct swap_info_struct:
android_vh_alloc_si, extend the allocation of struct swap_info_struct,
adding data to record the information of specified reclaimed location;
android_vh_init_swap_info_struct, adding initializing the extension of
struct swap_info_struct;

Bug: 234214858
Signed-off-by: Bing Han <bing.han@transsion.com>
Change-Id: I0e1d8e38ba7dfd52b609b1c14eb78f8b0ef0f9e6
This commit is contained in:
Bing Han
2022-06-10 19:00:02 +08:00
committed by Treehugger Robot
parent bc4c73c182
commit 667f0d71dc
3 changed files with 14 additions and 2 deletions
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2
drivers/android/vendor_hooks.c
View File

@@ -422,3 +422,5 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_inactive_is_low);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_snapshot_refaults);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_account_swap_pages);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_unuse_swap_page);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_init_swap_info_struct);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_alloc_si);

6
include/trace/hooks/mm.h
View File

@@ -188,6 +188,12 @@ DECLARE_HOOK(android_vh_account_swap_pages,
DECLARE_HOOK(android_vh_unuse_swap_page,
TP_PROTO(struct swap_info_struct *si, struct page *page),
TP_ARGS(si, page));
DECLARE_HOOK(android_vh_init_swap_info_struct,
TP_PROTO(struct swap_info_struct *p, struct plist_head *swap_avail_heads),
TP_ARGS(p, swap_avail_heads));
DECLARE_HOOK(android_vh_alloc_si,
TP_PROTO(struct swap_info_struct **p, bool *skip),
TP_ARGS(p, skip));
/* macro versions of hooks are no longer required */
#endif /* _TRACE_HOOK_MM_H */

8
mm/swapfile.c
View File

@@ -2898,12 +2898,15 @@ late_initcall(max_swapfiles_check);
static struct swap_info_struct *alloc_swap_info(void)
{
struct swap_info_struct *p;
struct swap_info_struct *p = NULL;
struct swap_info_struct *defer = NULL;
unsigned int type;
int i;
bool skip = false;
p = kvzalloc(struct_size(p, avail_lists, nr_node_ids), GFP_KERNEL);
trace_android_vh_alloc_si(&p, &skip);
if (!skip)
p = kvzalloc(struct_size(p, avail_lists, nr_node_ids), GFP_KERNEL);
if (!p)
return ERR_PTR(-ENOMEM);
@@ -3386,6 +3389,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
(swap_flags & SWAP_FLAG_PRIO_MASK) >> SWAP_FLAG_PRIO_SHIFT;
enable_swap_info(p, prio, swap_map, cluster_info, frontswap_map);
trace_android_vh_init_swap_info_struct(p, swap_avail_heads);
pr_info("Adding %uk swap on %s. Priority:%d extents:%d across:%lluk %s%s%s%s%s\n",
p->pages<<(PAGE_SHIFT-10), name->name, p->prio,
nr_extents, (unsigned long long)span<<(PAGE_SHIFT-10),