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binder: add more debug info when allocation fails. 

Display information about allocated/free space whenever
binder buffer allocation fails on synchronous
transactions.

Signed-off-by: Martijn Coenen <maco@android.com>
Signed-off-by: Siqi Lin <siqilin@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Martijn Coenen 2017-06-29 12:01:52 -07:00 committed by Greg Kroah-Hartman
parent 53d311cfa1
commit b05a68e94b
1 changed files with 30 additions and 1 deletions
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31
drivers/android/binder_alloc.c
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@ -337,8 +337,36 @@ struct binder_buffer *binder_alloc_new_buf_locked(struct binder_alloc *alloc,
} }
} }
if (best_fit == NULL) { if (best_fit == NULL) {
size_t allocated_buffers = 0;
size_t largest_alloc_size = 0;
size_t total_alloc_size = 0;
size_t free_buffers = 0;
size_t largest_free_size = 0;
size_t total_free_size = 0;
for (n = rb_first(&alloc->allocated_buffers); n != NULL;
n = rb_next(n)) {
buffer = rb_entry(n, struct binder_buffer, rb_node);
buffer_size = binder_alloc_buffer_size(alloc, buffer);
allocated_buffers++;
total_alloc_size += buffer_size;
if (buffer_size > largest_alloc_size)
largest_alloc_size = buffer_size;
}
for (n = rb_first(&alloc->free_buffers); n != NULL;
n = rb_next(n)) {
buffer = rb_entry(n, struct binder_buffer, rb_node);
buffer_size = binder_alloc_buffer_size(alloc, buffer);
free_buffers++;
total_free_size += buffer_size;
if (buffer_size > largest_free_size)
largest_free_size = buffer_size;
}
pr_err("%d: binder_alloc_buf size %zd failed, no address space\n", pr_err("%d: binder_alloc_buf size %zd failed, no address space\n",
alloc->pid, size); alloc->pid, size);
pr_err("allocated: %zd (num: %zd largest: %zd), free: %zd (num: %zd largest: %zd)\n",
total_alloc_size, allocated_buffers, largest_alloc_size,
total_free_size, free_buffers, largest_free_size);
return ERR_PTR(-ENOSPC); return ERR_PTR(-ENOSPC);
} }
if (n == NULL) { if (n == NULL) {
@ -698,9 +726,10 @@ void binder_alloc_deferred_release(struct binder_alloc *alloc)
static void print_binder_buffer(struct seq_file *m, const char *prefix, static void print_binder_buffer(struct seq_file *m, const char *prefix,
struct binder_buffer *buffer) struct binder_buffer *buffer)
{ {
seq_printf(m, "%s %d: %pK size %zd:%zd %s\n", seq_printf(m, "%s %d: %pK size %zd:%zd:%zd %s\n",
prefix, buffer->debug_id, buffer->data, prefix, buffer->debug_id, buffer->data,
buffer->data_size, buffer->offsets_size, buffer->data_size, buffer->offsets_size,
buffer->extra_buffers_size,
buffer->transaction ? "active" : "delivered"); buffer->transaction ? "active" : "delivered");
} }