December 2020 - Linuxarm - mailweb.openeuler.org

Is it ok to use debugfs to dump some ucontext-level driver-defined info?
by liweihang 05 Jan '21

05 Jan '21

Hi all, We want to dump some hns driver-defined information that belongs to a process to keep track of current memory usage. For example, there is a ucontext-level(process-level) memory pool to store WQE which is shared by a lot of QPs, we want to record and query which QPs are using this pool and how much space each QP is using. rdmatool don't have a ucontext-level resource tracking currently, is it ok to achieve that through debugfs? This may looks like: $ echo 1 > <dbgfs_dir>/hns_roce/hns_0/<pid>/qp QPN Total(kB) SQ(kB) SGE(kB) RQ(kB) 110 6400 256 2048 4096 118 6400 256 2048 0 Or should it be achieved in rdmatool? Thanks Weihang

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[PATCH mm/zswap 0/2] Fix the compatibility of zsmalloc and zswap
by Tian Tao 25 Dec '20

25 Dec '20

patch #1 add a flag to zpool, then zswap used to determine if zpool drivers such as zbud/z3fold/zsmalloc whether can sleep in atoimc context. patch #2 set flag sleep_mapped to true indicates that zbud/z3fold can sleep in atomic context. zsmalloc didin't support sleep in atomic context, so not set that flag to true. Tian Tao (2): mm/zswap: add the flag can_sleep_mapped mm: set the sleep_mapped to true include/linux/zpool.h | 3 +++ mm/z3fold.c | 1 + mm/zbud.c | 1 + mm/zpool.c | 13 +++++++++++++ mm/zswap.c | 27 ++++++++++++++++++++++++--- 5 files changed, 42 insertions(+), 3 deletions(-) -- 2.7.4

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Test
by John Garry 22 Dec '20

22 Dec '20

This is just a test, and I can imagine that we will have more of the same...

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