Messages in this thread | | | Date | Mon, 30 Nov 2009 10:35:41 +0100 | From | Jörn Engel <> | Subject | Re: [PATCH/RFC v5 4/5]: core: Add dump device to call on oopses and panics |
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On Mon, 30 November 2009 10:51:58 +0200, Artem Bityutskiy wrote: > > How about this patch on top of the existing one (untested): > > + /* > + * Have we ever rotated around the circular buffer? If we never did, > + * we have to have zeroes at the end. > + */ > + if (log_buf[end]) { > + s1 = log_buf + end; > + l1 = log_buf_len - end; > + } else { > + s1 = ""; > + l1 = 0;
So now you are assuming that a) the buffer is initially zeroed and b) noone ever writes NUL to it. Is that correct?
I'm not sure whether those assumptions are valid. If they are, then this will obviously work. Otherwise we can just always assume the wrapped case.
Jörn
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