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authorJustin M. Forbes <jforbes@fedoraproject.org>2018-12-07 10:06:21 -0600
committerJustin M. Forbes <jforbes@fedoraproject.org>2018-12-07 10:06:21 -0600
commit2dc35eee33ad2482404abeb3b896ff83bfec27bd (patch)
treeef95bb0c07d1c0221d37da814ad963d30bc1fa4f
parent22c4d677f9b880069df8789d65629b27c153c269 (diff)
downloadkernel-2dc35eee33ad2482404abeb3b896ff83bfec27bd.tar.gz
kernel-2dc35eee33ad2482404abeb3b896ff83bfec27bd.tar.xz
kernel-2dc35eee33ad2482404abeb3b896ff83bfec27bd.zip
Linux v4.20-rc5-86-gb72f711a4efa
-rw-r--r--blk-mq-fix-corruption-with-direct-issue.patch99
-rw-r--r--gitrev2
-rw-r--r--kernel.spec8
-rw-r--r--sources2
4 files changed, 6 insertions, 105 deletions
diff --git a/blk-mq-fix-corruption-with-direct-issue.patch b/blk-mq-fix-corruption-with-direct-issue.patch
deleted file mode 100644
index 71b9da110..000000000
--- a/blk-mq-fix-corruption-with-direct-issue.patch
+++ /dev/null
@@ -1,99 +0,0 @@
-From ffe81d45322cc3cb140f0db080a4727ea284661e Mon Sep 17 00:00:00 2001
-From: Jens Axboe <axboe@kernel.dk>
-Date: Tue, 4 Dec 2018 20:06:48 -0700
-Subject: [PATCH] blk-mq: fix corruption with direct issue
-
-If we attempt a direct issue to a SCSI device, and it returns BUSY, then
-we queue the request up normally. However, the SCSI layer may have
-already setup SG tables etc for this particular command. If we later
-merge with this request, then the old tables are no longer valid. Once
-we issue the IO, we only read/write the original part of the request,
-not the new state of it.
-
-This causes data corruption, and is most often noticed with the file
-system complaining about the just read data being invalid:
-
-[ 235.934465] EXT4-fs error (device sda1): ext4_iget:4831: inode #7142: comm dpkg-query: bad extra_isize 24937 (inode size 256)
-
-because most of it is garbage...
-
-This doesn't happen from the normal issue path, as we will simply defer
-the request to the hardware queue dispatch list if we fail. Once it's on
-the dispatch list, we never merge with it.
-
-Fix this from the direct issue path by flagging the request as
-REQ_NOMERGE so we don't change the size of it before issue.
-
-See also:
- https://bugzilla.kernel.org/show_bug.cgi?id=201685
-
-Tested-by: Guenter Roeck <linux@roeck-us.net>
-Fixes: 6ce3dd6eec1 ("blk-mq: issue directly if hw queue isn't busy in case of 'none'")
-Cc: stable@vger.kernel.org
-Signed-off-by: Jens Axboe <axboe@kernel.dk>
-Signed-off-by: Jeremy Cline <jcline@redhat.com>
----
- block/blk-mq.c | 26 +++++++++++++++++++++++++-
- 1 file changed, 25 insertions(+), 1 deletion(-)
-
-diff --git a/block/blk-mq.c b/block/blk-mq.c
-index 3f91c6e5b17a..3262d83b9e07 100644
---- a/block/blk-mq.c
-+++ b/block/blk-mq.c
-@@ -1715,6 +1715,15 @@ static blk_status_t __blk_mq_issue_directly(struct blk_mq_hw_ctx *hctx,
- break;
- case BLK_STS_RESOURCE:
- case BLK_STS_DEV_RESOURCE:
-+ /*
-+ * If direct dispatch fails, we cannot allow any merging on
-+ * this IO. Drivers (like SCSI) may have set up permanent state
-+ * for this request, like SG tables and mappings, and if we
-+ * merge to it later on then we'll still only do IO to the
-+ * original part.
-+ */
-+ rq->cmd_flags |= REQ_NOMERGE;
-+
- blk_mq_update_dispatch_busy(hctx, true);
- __blk_mq_requeue_request(rq);
- break;
-@@ -1727,6 +1736,18 @@ static blk_status_t __blk_mq_issue_directly(struct blk_mq_hw_ctx *hctx,
- return ret;
- }
-
-+/*
-+ * Don't allow direct dispatch of anything but regular reads/writes,
-+ * as some of the other commands can potentially share request space
-+ * with data we need for the IO scheduler. If we attempt a direct dispatch
-+ * on those and fail, we can't safely add it to the scheduler afterwards
-+ * without potentially overwriting data that the driver has already written.
-+ */
-+static bool blk_rq_can_direct_dispatch(struct request *rq)
-+{
-+ return req_op(rq) == REQ_OP_READ || req_op(rq) == REQ_OP_WRITE;
-+}
-+
- static blk_status_t __blk_mq_try_issue_directly(struct blk_mq_hw_ctx *hctx,
- struct request *rq,
- blk_qc_t *cookie,
-@@ -1748,7 +1769,7 @@ static blk_status_t __blk_mq_try_issue_directly(struct blk_mq_hw_ctx *hctx,
- goto insert;
- }
-
-- if (q->elevator && !bypass_insert)
-+ if (!blk_rq_can_direct_dispatch(rq) || (q->elevator && !bypass_insert))
- goto insert;
-
- if (!blk_mq_get_dispatch_budget(hctx))
-@@ -1810,6 +1831,9 @@ void blk_mq_try_issue_list_directly(struct blk_mq_hw_ctx *hctx,
- struct request *rq = list_first_entry(list, struct request,
- queuelist);
-
-+ if (!blk_rq_can_direct_dispatch(rq))
-+ break;
-+
- list_del_init(&rq->queuelist);
- ret = blk_mq_request_issue_directly(rq);
- if (ret != BLK_STS_OK) {
---
-2.19.2
-
diff --git a/gitrev b/gitrev
index 5d60e8028..ce57d3512 100644
--- a/gitrev
+++ b/gitrev
@@ -1 +1 @@
-d0897090458211f9c6b2d7f5af87f4d3b0403f69
+b72f711a4efadfaa8a16f9cb708bfe1ce6125906
diff --git a/kernel.spec b/kernel.spec
index fbd132010..5b1b28ef1 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -69,7 +69,7 @@ Summary: The Linux kernel
# The rc snapshot level
%global rcrev 5
# The git snapshot level
-%define gitrev 2
+%define gitrev 3
# Set rpm version accordingly
%define rpmversion 4.%{upstream_sublevel}.0
%endif
@@ -609,9 +609,6 @@ Patch504: iio-accel-kxcjk1013-Add-more-hardware-ids.patch
# rhbz 1645070 patch queued upstream for merging into 4.21
Patch505: asus-fx503-keyb.patch
-# https://bugzilla.kernel.org/show_bug.cgi?id=201685
-Patch506: blk-mq-fix-corruption-with-direct-issue.patch
-
# END OF PATCH DEFINITIONS
%endif
@@ -1884,6 +1881,9 @@ fi
#
#
%changelog
+* Fri Dec 07 2018 Justin M. Forbes <jforbes@fedoraproject.org> - 4.20.0-0.rc5.git3.1
+- Linux v4.20-rc5-86-gb72f711a4efa
+
* Wed Dec 05 2018 Justin M. Forbes <jforbes@fedoraproject.org> - 4.20.0-0.rc5.git2.1
- Linux v4.20-rc5-44-gd08970904582
diff --git a/sources b/sources
index d5e02b370..c8bab1e62 100644
--- a/sources
+++ b/sources
@@ -1,3 +1,3 @@
SHA512 (linux-4.19.tar.xz) = ab67cc746b375a8b135e8b23e35e1d6787930d19b3c26b2679787d62951cbdbc3bb66f8ededeb9b890e5008b2459397f9018f1a6772fdef67780b06a4cb9f6f4
SHA512 (patch-4.20-rc5.xz) = 389daea25e1a19050fa2e7f4eb7cc8e462a83560a06b43b5bd8458bfcf3754c987660c2b42f9adeacd956342f4520c45d2982fbee4cfd2b8825f9153db06aaa9
-SHA512 (patch-4.20-rc5-git2.xz) = 7f7c2f053d314ced612c773a023b171f24c60a7f41878557d77e307239b88b0d12d7532e3ba0b377959a12570fd639d5ad71960e87fdd1d21ff22296c4ea4167
+SHA512 (patch-4.20-rc5-git3.xz) = 1b7cb0ddc1213104c001fb0dc9dedc03bf5c482d6823de685a661fafb5458d413868d4f07f23013bb85c258e9eda73fb12d6089e0df97c667733fb79eb8fcf17