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Set max_ra_pages according to total ram size

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Set 8 for ram size < 8G RAM and 16 for >= 8G RAM

Change-Id: I3b3561cf69f0b8e083395752806db652cc873289
Reviewed-on: https://gerrit.mot.com/2718477
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Reviewed-by: Huosheng Liao <liaohs@motorola.com>
Submit-Approved: Jira Key
This commit is contained in:
Xiaojun Ji 2023-08-23 11:42:35 +08:00
commit 4c1747097c
1 changed files with 13 additions and 1 deletions
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14
drivers/moto_mmap_fault/moto_mmap_fault.c
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@ -16,7 +16,7 @@
#include <linux/pagemap.h>
#include <linux/version.h>
static int max_ra_pages = 8;
static int max_ra_pages = -1;
module_param(max_ra_pages, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(max_ra_pages, "Max read ahead pages");
@ -105,9 +105,21 @@ static void __nocfi filemap_fault_cache_page(void *p, struct vm_fault *vmf, stru
static int __nocfi __init moto_mmap_fault_init(void)
{
int ret = 0;
int ramsize_GB = (totalram_pages() >> (30 - PAGE_SHIFT)) + 1;
if (max_ra_pages == -1) {
/* Set 8 pages for < 8G RAM and set 16 pages for >= 8G RAM */
if (ramsize_GB < 8)
max_ra_pages = 8;
else
max_ra_pages = 16;
}
#if defined(TUNE_MMAP_READAROUND)
pr_info("Using the new mmap fault driver, totalram size=%dGB", ramsize_GB);
ret = register_trace_android_vh_tune_mmap_readaround(tune_mmap_readaround, NULL);
#else
pr_info("Using the legacy mmap fault driver, totalram size=%dGB", ramsize_GB);
ret = register_trace_android_vh_filemap_fault_get_page(filemap_fault_get_page, NULL) ?:
register_trace_android_vh_filemap_fault_cache_page(filemap_fault_cache_page, NULL);
#endif