From: Tang Yizhou tangyizhou@huawei.com
ascend inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4EUVI CVE: NA
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/proc/sharepool/spa_stat now can show the pid of applier process, which helps to debug and check memleak.
Signed-off-by: Tang Yizhou tangyizhou@huawei.com Reviewed-by: Ding Tianhong dingtianhong@huawei.com Reviewed-by: Kefeng Wang wangkefeng.wang@huawei.com Signed-off-by: Yang Yingliang yangyingliang@huawei.com Reviewed-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- mm/share_pool.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-)
diff --git a/mm/share_pool.c b/mm/share_pool.c index 958e75ae4f7f3..e7d8b63138a8b 100644 --- a/mm/share_pool.c +++ b/mm/share_pool.c @@ -213,6 +213,7 @@ struct sp_area { enum spa_type type; /* where spa born from */ struct mm_struct *mm; /* owner of k2u(task) */ unsigned long kva; /* shared kva */ + pid_t applier; /* the original applier process */ }; static DEFINE_SPINLOCK(sp_area_lock); static struct rb_root sp_area_root = RB_ROOT; @@ -797,7 +798,8 @@ static unsigned long cached_vstart; /* affected by SP_DVPP and sp_config_dvpp_r * Return NULL if fail. */ static struct sp_area *sp_alloc_area(unsigned long size, unsigned long flags, - struct sp_group *spg, enum spa_type type) + struct sp_group *spg, enum spa_type type, + pid_t applier) { struct sp_area *spa, *first, *err; struct rb_node *n; @@ -914,6 +916,7 @@ static struct sp_area *sp_alloc_area(unsigned long size, unsigned long flags, spa->type = type; spa->mm = NULL; spa->kva = 0; /* NULL pointer */ + spa->applier = applier;
if (spa_inc_usage(type, size, (flags & SP_DVPP))) { err = ERR_PTR(-EINVAL); @@ -1350,7 +1353,7 @@ void *sp_alloc(unsigned long size, unsigned long sp_flags, int spg_id) size_aligned = ALIGN(size, PAGE_SIZE); } try_again: - spa = sp_alloc_area(size_aligned, sp_flags, spg, SPA_TYPE_ALLOC); + spa = sp_alloc_area(size_aligned, sp_flags, spg, SPA_TYPE_ALLOC, current->tgid); if (IS_ERR(spa)) { pr_err_ratelimited("share pool: allocation failed due to alloc spa failure " "(potential no enough virtual memory when -75): %ld\n", PTR_ERR(spa)); @@ -1758,7 +1761,7 @@ void *sp_make_share_k2u(unsigned long kva, unsigned long size, uva = ERR_PTR(-EINVAL); goto out_drop_proc_stat; } - spa = sp_alloc_area(size_aligned, sp_flags, NULL, SPA_TYPE_K2TASK); + spa = sp_alloc_area(size_aligned, sp_flags, NULL, SPA_TYPE_K2TASK, tsk->tgid); if (IS_ERR(spa)) { pr_err_ratelimited("share pool: k2u(task) failed due to alloc spa failure " "(potential no enough virtual memory when -75): %ld\n", PTR_ERR(spa)); @@ -1787,9 +1790,9 @@ void *sp_make_share_k2u(unsigned long kva, unsigned long size, }
if (enable_share_k2u_spg) - spa = sp_alloc_area(size_aligned, sp_flags, spg, SPA_TYPE_K2SPG); + spa = sp_alloc_area(size_aligned, sp_flags, spg, SPA_TYPE_K2SPG, tsk->tgid); else - spa = sp_alloc_area(size_aligned, sp_flags, NULL, SPA_TYPE_K2TASK); + spa = sp_alloc_area(size_aligned, sp_flags, NULL, SPA_TYPE_K2TASK, tsk->tgid);
if (IS_ERR(spa)) { up_read(&spg->rw_lock); @@ -2577,7 +2580,7 @@ static void rb_spa_stat_show(struct seq_file *seq) up_read(&spa->spg->rw_lock); }
- seq_printf(seq, "%2s%-14lx %2s%-14lx %-13ld ", + seq_printf(seq, "%2s%-14lx %2s%-14lx %-10ld ", "0x", spa->va_start, "0x", spa->va_end, byte2kb(spa->real_size)); @@ -2602,7 +2605,8 @@ static void rb_spa_stat_show(struct seq_file *seq) else seq_printf(seq, "%-5s ", "N");
- seq_printf(seq, "%-10d\n", atomic_read(&spa->use_count)); + seq_printf(seq, "%-8d ", spa->applier); + seq_printf(seq, "%-8d\n", atomic_read(&spa->use_count));
spin_lock(&sp_area_lock); } @@ -2712,8 +2716,8 @@ static int spa_stat_show(struct seq_file *seq, void *offset) spg_overview_show(seq); spa_overview_show(seq); /* print the file header */ - seq_printf(seq, "%-10s %-16s %-16s %-13s %-7s %-5s %-10s\n", - "Group ID", "va_start", "va_end", "Aligned KB", "Type", "Huge", "Ref"); + seq_printf(seq, "%-10s %-16s %-16s %-10s %-7s %-5s %-8s %-8s\n", + "Group ID", "va_start", "va_end", "Size(KB)", "Type", "Huge", "PID", "Ref"); rb_spa_stat_show(seq); return 0; }