Messages in this thread Patch in this message | | | Date | Fri, 30 Mar 2018 17:42:09 -0400 | From | Steven Rostedt <> | Subject | Re: [PATCH v1] kernel/trace:check the val against the available mem |
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On Fri, 30 Mar 2018 17:30:31 -0400 Steven Rostedt <rostedt@goodmis.org> wrote:
> I'll take a look at si_mem_available() that Joel suggested and see if > we can make that work.
Wow, this appears to work great! Joel and Zhaoyang, can you test this?
-- Steve
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index a2fd3893cc02..32a803626ee2 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -1164,6 +1164,11 @@ static int __rb_allocate_pages(long nr_pages, struct list_head *pages, int cpu) struct buffer_page *bpage, *tmp; long i; + /* Check if the available memory is there first */ + i = si_mem_available(); + if (i < nr_pages) + return -ENOMEM; + for (i = 0; i < nr_pages; i++) { struct page *page; /*
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