* Debugging memory leak which depends on CPU topology
@ 2024-09-11 16:37 Dmitry Antipov
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From: Dmitry Antipov @ 2024-09-11 16:37 UTC (permalink / raw)
To: linux-mm; +Cc: lvc-project
Hello,
are there any hints for debugging kernel memory leak which seems
depends on CPU topology? There is a syzbot reproducer which causes
an OOM killer invocation nearly in a minute when running in a QEMU
VM with '-m 8G -smp 4,sockets=4,cores=1' but not with
'-m 8G -smp 8,sockets=4,cores=2'. To whom it may be interesting,
the one is https://syzkaller.appspot.com/text?tag=ReproC&x=10b60342980000,
and it produces an extremely high pressure on 'net_hotdata.skbuff_cache'
and 'net_hotdata.skb_small_head_cache'.
Thanks in advance,
Dmitry
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