On Tuesday 16 April 2013 11:50 AM, Aruna Balakrishnaiah wrote:
Currently with this patchset, pstore is not supporting compression of
oops-messages
since it involves some changes in the pstore framework.
big_oops_buf will hold the large part of oops data which will be compressed
and put
to oops_buf.
big_oops_buf: (1.45 of oops_partition_size)
Sorry, big_oops_buf is (2.22 of oops_data_sz)
where oops_data_sz is oops_partition_size - sizeof(oops_log_info).
where oops_log_info is oops header.
_________________________
| header | oops-text |
|_________|_____________|
<header> is added by the pstore.
So in case compression fails:
we would need to log the header + last few bytes of big_oops_buf to oops_buf.
oops_buf: (this is of oops_partition_size)
We would need to log the header + last oops_data_sz bytes of big_oops_buf to
oops_buf.
So that we can have the header while throwing away the data that immediately
follows it.
we need last few bytes of big_oops_buf as we need to log the recent messages of
printk buffer. For which we need to know the header size and it involves some
changes in the pstore framework.
Just communicating the header size from pstore would do the job for us.
I have the compression patches ready, will be posting it soon as a separate set.
cheers
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