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| author | Fred Isaman <fred.isaman@gmail.com> | 2016-09-30 21:37:41 +0300 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2016-12-09 05:49:57 +0300 |
| commit | 65990d1afbd2d6fc23c6ecbd6f1899aa760a024f (patch) | |
| tree | 3a18ac67020a08d0e7aec06158902b10f0644c4f /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | 2f065ddb64193ebf9cd600395d4782287cd0f58e (diff) | |
| download | linux-65990d1afbd2d6fc23c6ecbd6f1899aa760a024f.tar.xz | |
pNFS/flexfiles: Fix a deadlock on LAYOUTGET
We encountered a deadlock where the SEQUENCE that accompanied the
LAYOUTGET triggered a session drain, while ff_layout_alloc_lseg
triggered a GETDEVICEINFO. The GETDEVICEINFO hung waiting for the
session drain, while the LAYOUTGET held the slot waiting for
alloc_lseg to finish.
Avoid this by moving the call to nfs4_find_get_deviceid out of
ff_layout_alloc_lseg and into nfs4_ff_layout_prepare_ds.
Signed-off-by: Fred Isaman <fred.isaman@gmail.com>
[dros@primarydata.com: pNFS/flexfiles: fix races in ff_layout_mirror_valid]
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions