Re: [Bug 43227] New: BUG: Bad page state in process wcg_gfam_6.11_i

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On Fri, May 11, 2012 at 02:30:42PM -0700, Hugh Dickins wrote:
 
 > > when the page was freed, not when it was reused!  Can anyone think of a
 > > reason why PAGE_FLAGS_CHECK_AT_FREE doesn't include these flags (at
 > > least)?
 > Because those flags may validly be set when a page is freed (I do have an
 > old patch to change anon dirty handling to stop that, but it's not really
 > needed).

It would be nice to be able to distinguish from things like random memory
scribbles setting those flags.

 > The only thought I have on this report: what binutils was used to build
 > this kernel?  We had "Bad page" and isolate_lru_pages BUG reports at the
 > start of the month, and they were traced to buggy binutils 2.22.52.0.2

The fedora reports we have are from binutils prior to that (2.21.53.0.1 is
the newest we have in F16 for eg).

	Dave

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