Liam R. Howlett 3262ff5826 maple_tree: add GFP_KERNEL to allocations in mas_expected_entries() ... commit 099d7439ce upstream. Users complained about OOM errors during fork without triggering compaction. This can be fixed by modifying the flags used in mas_expected_entries() so that the compaction will be triggered in low memory situations. Since mas_expected_entries() is only used during fork, the extra argument does not need to be passed through. Additionally, the two test_maple_tree test cases and one benchmark test were altered to use the correct locking type so that allocations would not trigger sleeping and thus fail. Testing was completed with lockdep atomic sleep detection. The additional locking change requires rwsem support additions to the tools/ directory through the use of pthreads pthread_rwlock_t. With this change test_maple_tree works in userspace, as a module, and in-kernel. Users may notice that the system gave up early on attempting to start new processes instead of attempting to reclaim memory. Link: https://lkml.kernel.org/r/20230915093243epcms1p46fa00bbac1ab7b7dca94acb66c44c456@epcms1p4 Link: https://lkml.kernel.org/r/20231012155233.2272446-1-Liam.Howlett@oracle.com Fixes: 54a611b605 ("Maple Tree: add new data structure") Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com> Reviewed-by: Peng Zhang <zhangpeng.00@bytedance.com> Cc: <jason.sim@samsung.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-11-02 09:35:24 +01:00
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asm	…
asm-generic	…
linux	maple_tree: add GFP_KERNEL to allocations in mas_expected_entries()	2023-11-02 09:35:24 +01:00
nolibc	…
tools	…
trace/events	…
uapi	bpf: Add BPF_FIB_LOOKUP_SKIP_NEIGH for bpf_fib_lookup	2023-10-10 22:00:42 +02:00
vdso	…