New: Random BUG at include/linux/swapops.h:105
Andrew Morton
maintainer(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface).
Quoted 18 lines · On Fri, 10 Jun 2011 01:09:48 GMT [email protected] wrote:
https://bugzilla.kernel.org/show_bug.cgi?id=37072
Summary: Random BUG at
include/linux/swapops.h:105
Product: Memory Management
Version: 2.5
Kernel Version: 2.6.39
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: Other
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: Yes
Quoted 3 lines
Didn't have a sensible console working apparently... photo of monitor:
http://www.facebook.com/photo.php?pid=2522123&l=ec1a1e6145&id=1496065002
handle_mm_fault
->handle_pte_fault
->do_swap_page
->migration_entry_wait
->migration_entry_to_page
->BUG_ON(!PageLocked(p))How is this supposed to ever work?
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Quoted 8 lines · Andrew Morton
handle_mm_fault
->handle_pte_fault
->do_swap_page->migration_entry_wait ->migration_entry_to_page ->BUG_ON(!PageLocked(p))How is this supposed to ever work?
A page is always locked during migration. Thus a migration entry can only exist while a page is locked. The migration entries purpose is to hold off establishing new references to a page that is locked. See unmap_and_move().
Looks like some of the recent patches may cause an unlock the page without removal of the migration entry?
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