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?
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(-)