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authorMel Gorman <mel@csn.ul.ie>2008-07-24 06:26:49 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 19:47:13 +0200
commit6b74ab97bc12ce74acec900f1d89a4aee2e4d70d (patch)
treed9d7b522a4a8f5f605d2e0f7f7a1bcb9d5049a82 /firmware/emi62
parentadd HAVE_CLK to Kconfig, for driver dependencies (diff)
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mm: add a basic debugging framework for memory initialisation
Boot initialisation is very complex, with significant numbers of architecture-specific routines, hooks and code ordering. While significant amounts of the initialisation is architecture-independent, it trusts the data received from the architecture layer. This is a mistake, and has resulted in a number of difficult-to-diagnose bugs. This patchset adds some validation and tracing to memory initialisation. It also introduces a few basic defensive measures. The validation code can be explicitly disabled for embedded systems. This patch: Add additional debugging and verification code for memory initialisation. Once enabled, the verification checks are always run and when required additional debugging information may be outputted via a mminit_loglevel= command-line parameter. The verification code is placed in a new file mm/mm_init.c. Ideally other mm initialisation code will be moved here over time. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'firmware/emi62')
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