From: James Simmons <jsimmons@infradead.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
devel@driverdev.osuosl.org,
Andreas Dilger <andreas.dilger@intel.com>,
Oleg Drokin <oleg.drokin@intel.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Lustre Development List <lustre-devel@lists.lustre.org>,
Bruno Faccini <bruno.faccini@intel.com>,
James Simmons <jsimmons@infradead.org>
Subject: [PATCH 01/41] staging: lustre: obdclass: fix race during key quiescency
Date: Sun, 2 Oct 2016 22:27:57 -0400 [thread overview]
Message-ID: <1475461717-21631-2-git-send-email-jsimmons@infradead.org> (raw)
In-Reply-To: <1475461717-21631-1-git-send-email-jsimmons@infradead.org>
From: Bruno Faccini <bruno.faccini@intel.com>
Upon umount, presumably of last device using same OSD back-end,
to prepare for module unload, lu_context_key_quiesce() is run to
remove all module's key reference in any context linked on
lu_context_remembered list.
Threads must protect against such transversal processing when
exiting from its context.
Signed-off-by: Bruno Faccini <bruno.faccini@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5264
Reviewed-on: http://review.whamcloud.com/13103
Reviewed-by: Mike Pershin <mike.pershin@intel.com>
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
---
drivers/staging/lustre/lustre/obdclass/lu_object.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/staging/lustre/lustre/obdclass/lu_object.c b/drivers/staging/lustre/lustre/obdclass/lu_object.c
index 054e567..f0e74c6 100644
--- a/drivers/staging/lustre/lustre/obdclass/lu_object.c
+++ b/drivers/staging/lustre/lustre/obdclass/lu_object.c
@@ -1663,6 +1663,9 @@ void lu_context_exit(struct lu_context *ctx)
ctx->lc_state = LCS_LEFT;
if (ctx->lc_tags & LCT_HAS_EXIT && ctx->lc_value) {
for (i = 0; i < ARRAY_SIZE(lu_keys); ++i) {
+ /* could race with key quiescency */
+ if (ctx->lc_tags & LCT_REMEMBER)
+ spin_lock(&lu_keys_guard);
if (ctx->lc_value[i]) {
struct lu_context_key *key;
@@ -1671,6 +1674,8 @@ void lu_context_exit(struct lu_context *ctx)
key->lct_exit(ctx,
key, ctx->lc_value[i]);
}
+ if (ctx->lc_tags & LCT_REMEMBER)
+ spin_unlock(&lu_keys_guard);
}
}
}
--
1.7.1
next prev parent reply other threads:[~2016-10-03 2:28 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-03 2:27 [PATCH 00/41] missing patches for lustre 2.7.50 to 2.7.55 James Simmons
2016-10-03 2:27 ` James Simmons [this message]
2016-10-03 2:27 ` [PATCH 02/41] staging: lustre: obdclass: Add synchro in lu_context_key_degister() James Simmons
2016-10-03 2:27 ` [PATCH 03/41] staging: lustre: llite: remove client Size on MDS support James Simmons
2016-10-03 2:28 ` [PATCH 04/41] staging: lustre: obd: " James Simmons
2016-10-03 2:28 ` [PATCH 05/41] staging: lustre: clio: Revise read ahead implementation James Simmons
2016-10-03 2:28 ` [PATCH 06/41] staging: lustre: ldlm: remove unnecessary EXPORT_SYMBOL James Simmons
2016-10-03 2:28 ` [PATCH 07/41] staging: lustre: llite: remove duplicate fiemap defines James Simmons
2016-10-03 2:28 ` [PATCH 08/41] staging: lustre: ptlrpc: ret -ECONNREFUSED if not context found in req James Simmons
2016-10-03 2:28 ` [PATCH 09/41] staging: lustre: llite: default dir stripe index only for mkdir James Simmons
2016-10-03 2:28 ` [PATCH 10/41] staging: lustre: libcfs: shortcut to create CPT from NUMA topology James Simmons
2016-10-03 2:28 ` [PATCH 11/41] staging: lustre: ptlrpc: Add OBD_CONNECT_MULTIMODRPCS flag James Simmons
2016-10-03 2:28 ` [PATCH 12/41] staging: lustre: clio: get rid of lov_stripe_md reference James Simmons
2016-10-03 2:28 ` [PATCH 13/41] staging: lustre: clio: use CIT_SETATTR for FSFILT_IOC_SETFLAGS James Simmons
2016-10-03 2:28 ` [PATCH 14/41] staging: lustre: ptlrpc: Add a tag field to ptlrpc messages James Simmons
2016-10-03 2:28 ` [PATCH 15/41] staging: lustre: osc: fix bug when setting max_pages_per_rpc James Simmons
2016-10-03 2:28 ` [PATCH 16/41] staging: lustre: ldlm: Do not use cbpending for group locks James Simmons
2016-10-03 2:28 ` [PATCH 17/41] staging: lustre: ptlrpc: remove old protocol compatibility James Simmons
2016-10-03 2:28 ` [PATCH 18/41] staging: lustre: llite: Report first encountered error James Simmons
2016-10-03 2:28 ` [PATCH 19/41] staging: lustre: ptlrpc: dont take unwrap in req_waittime calculation James Simmons
2016-10-03 2:28 ` [PATCH 20/41] staging: lustre: remove Size on MDS support James Simmons
2016-10-03 2:28 ` [PATCH 21/41] staging: lustre: mdc: Removed unneeded NULL check James Simmons
2016-10-03 2:28 ` [PATCH 22/41] staging: lustre: obd: remove unused LSM parameters James Simmons
2016-10-03 2:28 ` [PATCH 23/41] staging: lustre: mgc: MGC should retry for invalid import James Simmons
2016-10-03 2:28 ` [PATCH 24/41] staging: lustre: clio: add CIT_DATA_VERSION and remove IOC_LOV_GETINFO James Simmons
2018-02-22 3:06 ` NeilBrown
2016-10-03 2:28 ` [PATCH 25/41] staging: lustre: lov: add cl_object_layout_get() James Simmons
2016-10-03 2:28 ` [PATCH 26/41] staging: lustre: llite: remove lli_has_smd James Simmons
2016-10-03 2:28 ` [PATCH 27/41] staging: lustre: llite: add cl_object_maxbytes() James Simmons
2016-10-03 2:28 ` [PATCH 28/41] staging: lustre: hsm: make HSM modification requests replayable James Simmons
2016-10-03 2:28 ` [PATCH 29/41] staging: lustre: ptlrpc: Move NRS structures out of lustre_net.h James Simmons
2016-10-03 2:28 ` [PATCH 30/41] staging: lustre: quota: remove obsolete quota code James Simmons
2016-10-03 2:28 ` [PATCH 31/41] staging: lustre: obd: remove destroy cookie handling James Simmons
2016-10-03 2:28 ` [PATCH 32/41] staging: lustre: llite: restart short read/write for normal IO James Simmons
2016-10-09 14:16 ` Greg Kroah-Hartman
2016-10-11 23:22 ` James Simmons
2016-10-12 6:08 ` Greg Kroah-Hartman
2016-10-13 22:45 ` James Simmons
2016-10-14 7:41 ` Greg Kroah-Hartman
2016-10-03 2:28 ` [PATCH 33/41] staging: lustre: lov: use obd_get_info() to get def/max LOV EA sizes James Simmons
2016-10-03 2:28 ` [PATCH 34/41] staging: lustre: ldlm: cancel aged locks for LRUR James Simmons
2016-10-03 2:28 ` [PATCH 35/41] staging: lustre: hsm: Use file lease to implement migration James Simmons
2016-10-09 14:18 ` Greg Kroah-Hartman
2016-10-03 2:28 ` [PATCH 36/41] staging: lustre: ldlm: interval tree search in ldlm_lock_match() James Simmons
2016-10-03 2:28 ` [PATCH 37/41] staging: lustre: lov: copy_to_user uses wrong casting James Simmons
2016-10-03 2:28 ` [PATCH 38/41] staging: lustre: mdc: add max modify RPCs in flight variable James Simmons
2016-10-03 2:28 ` [PATCH 39/41] staging: lustre: osc: remove remaining bits for capa support James Simmons
2016-10-03 2:28 ` [PATCH 40/41] staging: lustre: lov: move LSM to LOV layer James Simmons
2016-10-03 2:28 ` [PATCH 41/41] staging: lustre: echo: request pages in batches James Simmons
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