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d4af56c5c7
Start tracking the VMAs with the new maple tree structure in parallel with the rb_tree. Add debug and trace events for maple tree operations and duplicate the rb_tree that is created on forks into the maple tree. The maple tree is added to the mm_struct including the mm_init struct, added support in required mm/mmap functions, added tracking in kernel/fork for process forking, and used to find the unmapped_area and checked against what the rbtree finds. This also moves the mmap_lock() in exit_mmap() since the oom reaper call does walk the VMAs. Otherwise lockdep will be unhappy if oom happens. When splitting a vma fails due to allocations of the maple tree nodes, the error path in __split_vma() calls new->vm_ops->close(new). The page accounting for hugetlb is actually in the close() operation, so it accounts for the removal of 1/2 of the VMA which was not adjusted. This results in a negative exit value. To avoid the negative charge, set vm_start = vm_end and vm_pgoff = 0. There is also a potential accounting issue in special mappings from insert_vm_struct() failing to allocate, so reverse the charge there in the failure scenario. Link: https://lkml.kernel.org/r/20220906194824.2110408-9-Liam.Howlett@oracle.com Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Tested-by: Yu Zhao <yuzhao@google.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: David Hildenbrand <david@redhat.com> Cc: David Howells <dhowells@redhat.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: SeongJae Park <sj@kernel.org> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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| .. | ||
| arm_ffa | ||
| arm_scmi | ||
| broadcom | ||
| cirrus | ||
| efi | ||
| imx | ||
| meson | ||
| psci | ||
| smccc | ||
| tegra | ||
| xilinx | ||
| arm_scpi.c | ||
| arm_sdei.c | ||
| dmi_scan.c | ||
| dmi-id.c | ||
| dmi-sysfs.c | ||
| edd.c | ||
| iscsi_ibft_find.c | ||
| iscsi_ibft.c | ||
| Kconfig | ||
| Makefile | ||
| memmap.c | ||
| mtk-adsp-ipc.c | ||
| pcdp.c | ||
| pcdp.h | ||
| qcom_scm-legacy.c | ||
| qcom_scm-smc.c | ||
| qcom_scm.c | ||
| qcom_scm.h | ||
| qemu_fw_cfg.c | ||
| raspberrypi.c | ||
| scpi_pm_domain.c | ||
| stratix10-rsu.c | ||
| stratix10-svc.c | ||
| sysfb_simplefb.c | ||
| sysfb.c | ||
| ti_sci.c | ||
| ti_sci.h | ||
| trusted_foundations.c | ||
| turris-mox-rwtm.c | ||