280294 2024-09-24 14:21:20 -0700 Distinguish always/trivially compactible allocations in libpas/bmalloc 2024-09-27 15:43:02 -0700 1 1 1 Unclassified WebKit bmalloc WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 d_degazio d_degazio ggaren webkit-bug-importer oldest_to_newest 2062843 0 d_degazio 2024-09-24 14:21:20 -0700 rdar://136616671 Currently, we distinguish between compactible allocations and non-compactible allocations in bmalloc/libpas. Beyond this, we should also track allocations that are trivially compactible v.s. non-trivially compactible - some memory regions (like the JIT reservation, or libpas immortal heap) are already mapped as large contiguous ranges, so it's trivial to compress addresses within them as offsets from the base. This is as opposed to other allocations from libpas, where the allocator otherwise operates normally (i.e. we use the bmalloc heap), and might need to actively pick a different space to allocate objects out of when we ask for an allocation we intend to store as a compact or packed pointer. 2062847 1 d_degazio 2024-09-24 14:38:31 -0700 Pull request: https://github.com/WebKit/WebKit/pull/34187 2063921 2 ews-feeder 2024-09-27 15:43:01 -0700 Committed 284395@main (2d71c4b7c91e): <https://commits.webkit.org/284395@main> Reviewed commits have been landed. Closing PR #34187 and removing active labels.