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622db5b643
Track the lifetime of ib_mr objects. Here's sample output from a test run
with NFS/RDMA:
<...>-361 [009] 79238.772782: mr_alloc: pd.id=3 mr.id=11 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79238.772812: mr_alloc: pd.id=3 mr.id=12 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79238.772839: mr_alloc: pd.id=3 mr.id=13 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79238.772866: mr_alloc: pd.id=3 mr.id=14 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79238.772893: mr_alloc: pd.id=3 mr.id=15 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79238.772921: mr_alloc: pd.id=3 mr.id=16 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79238.772947: mr_alloc: pd.id=3 mr.id=17 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79238.772974: mr_alloc: pd.id=3 mr.id=18 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79238.773001: mr_alloc: pd.id=3 mr.id=19 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79238.773028: mr_alloc: pd.id=3 mr.id=20 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79238.773055: mr_alloc: pd.id=3 mr.id=21 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79240.270942: mr_alloc: pd.id=3 mr.id=22 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79240.270975: mr_alloc: pd.id=3 mr.id=23 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79240.271007: mr_alloc: pd.id=3 mr.id=24 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79240.271036: mr_alloc: pd.id=3 mr.id=25 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79240.271067: mr_alloc: pd.id=3 mr.id=26 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79240.271095: mr_alloc: pd.id=3 mr.id=27 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79240.271121: mr_alloc: pd.id=3 mr.id=28 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79240.271153: mr_alloc: pd.id=3 mr.id=29 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79240.271181: mr_alloc: pd.id=3 mr.id=30 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79240.271208: mr_alloc: pd.id=3 mr.id=31 type=MEM_REG max_num_sg=30 rc=0
<...>-361 [009] 79240.271236: mr_alloc: pd.id=3 mr.id=32 type=MEM_REG max_num_sg=30 rc=0
<...>-4351 [001] 79242.299400: mr_dereg: mr.id=32
<...>-4351 [001] 79242.299467: mr_dereg: mr.id=31
<...>-4351 [001] 79242.299554: mr_dereg: mr.id=30
<...>-4351 [001] 79242.299615: mr_dereg: mr.id=29
<...>-4351 [001] 79242.299684: mr_dereg: mr.id=28
<...>-4351 [001] 79242.299748: mr_dereg: mr.id=27
<...>-4351 [001] 79242.299812: mr_dereg: mr.id=26
<...>-4351 [001] 79242.299874: mr_dereg: mr.id=25
<...>-4351 [001] 79242.299944: mr_dereg: mr.id=24
<...>-4351 [001] 79242.300009: mr_dereg: mr.id=23
<...>-4351 [001] 79242.300190: mr_dereg: mr.id=22
<...>-4351 [001] 79242.300263: mr_dereg: mr.id=21
<...>-4351 [001] 79242.300326: mr_dereg: mr.id=20
<...>-4351 [001] 79242.300388: mr_dereg: mr.id=19
<...>-4351 [001] 79242.300450: mr_dereg: mr.id=18
<...>-4351 [001] 79242.300516: mr_dereg: mr.id=17
<...>-4351 [001] 79242.300629: mr_dereg: mr.id=16
<...>-4351 [001] 79242.300718: mr_dereg: mr.id=15
<...>-4351 [001] 79242.300784: mr_dereg: mr.id=14
<...>-4351 [001] 79242.300879: mr_dereg: mr.id=13
<...>-4351 [001] 79242.300945: mr_dereg: mr.id=12
<...>-4351 [001] 79242.301012: mr_dereg: mr.id=11
Some features of the output:
- The lifetime and owner PD of each MR is clearly visible.
- The type of MR is captured, as is the SGE array size.
- Failing MR allocation can be recorded.
Link: https://lore.kernel.org/r/20191218201820.30584.34636.stgit@manet.1015granger.net
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.