48619 2010-10-29 01:39:34 -0700 [Qt][WK2] SharedMemory uses two pages for one page request 2010-11-02 02:06:55 -0700 1 1 1 Unclassified WebKit Platform 528+ (Nightly build) PC All RESOLVED DUPLICATE 48520 P2 Normal --- 1 kbalazs webkit-unassigned abecsi oldest_to_newest 301631 0 kbalazs 2010-10-29 01:39:34 -0700 Our shared memory implementation tries to minimize the number of allocations trough recycling unused mappings. This technique needs an extra word (word instead of a byte for aligning) in each mapping that tracks that the memory is used or it has been released. The problem is that we ending up in allocating an extra page if the client rounds up it's request to page size. This is the case of the VisitedLinkTable. 301634 1 kbalazs 2010-10-29 01:50:30 -0700 Oh.... My patch asserts. The essence of that was to hack around SharedMemory::systemPageSize to get back getpagesize() - extra_space but there is an assert at VisitedLinkTable.cpp:60 - ASSERT(isPowerOf2(m_tableSize)); and this fails with the patch. Grrrrrrr! 303267 2 kbalazs 2010-11-02 02:06:55 -0700 *** This bug has been marked as a duplicate of bug 48520 ***