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ANDROID: binder: show high watermark of alloc->pages.

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Show the high watermark of the index into the alloc->pages
array, to facilitate sizing the buffer on a per-process
basis.

Change-Id: I2b40cd16628e0ee45216c51dc9b3c5b0c862032e
Signed-off-by: Martijn Coenen <maco@android.com>
This commit is contained in:
Martijn Coenen 2017-10-24 16:37:39 +02:00
commit c05ec29384
2 changed files with 6 additions and 0 deletions
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4
drivers/android/binder_alloc.c
View file

@ -281,6 +281,9 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate,
goto err_vm_insert_page_failed;
}
if (index + 1 > alloc->pages_high)
alloc->pages_high = index + 1;
trace_binder_alloc_page_end(alloc, index);
/* vm_insert_page does not seem to increment the refcount */
}
@ -854,6 +857,7 @@ void binder_alloc_print_pages(struct seq_file *m,
}
mutex_unlock(&alloc->mutex);
seq_printf(m, " pages: %d:%d:%d\n", active, lru, free);
seq_printf(m, " pages high watermark: %zu\n", alloc->pages_high);
}
/**

2
drivers/android/binder_alloc.h
View file

@ -92,6 +92,7 @@ struct binder_lru_page {
* @pages: array of binder_lru_page
* @buffer_size: size of address space specified via mmap
* @pid: pid for associated binder_proc (invariant after init)
* @pages_high: high watermark of offset in @pages
*
* Bookkeeping structure for per-proc address space management for binder
* buffers. It is normally initialized during binder_init() and binder_mmap()
@ -112,6 +113,7 @@ struct binder_alloc {
size_t buffer_size;
uint32_t buffer_free;
int pid;
size_t pages_high;
};
#ifdef CONFIG_ANDROID_BINDER_IPC_SELFTEST