| Commit message (Collapse) | Author | Age | Files | Lines |
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git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
9p: update Documentation pointers
net/9p: enable 9p to work in non-default network namespace
net/9p: p9_idpool_get return -1 on error
fs/9p: Don't clunk dentry fid when we fail to get a writeback inode
9p: Small cleanup in <net/9p/9p.h>
9p: remove experimental tag from tested configurations
9p: typo fixes and minor cleanups
net/9p: Change linuxdoc names to match functions.
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Update documentation pointers to include virtfs publication, 9p RFC
as well as updated list of servers and alternative clients.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Teach 9p filesystem to work in container with non-default network namespace.
(Note: I also patched the unix domain socket code but don't have a test case
for that. It's the same fix, I just don't have a server for it...)
To test, run diod server (http://code.google.com/p/diod):
diod -n -f -L stderr -l 172.23.255.1:9999 -c /dev/null -e /root
and then mount like so:
mount -t 9p -o port=9999,aname=/root,version=9p2000.L 172.23.255.1 /mnt
A container test environment is described at http://landley.net/lxc
Signed-off-by: Rob Landley <rob@landley.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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We need to return -1 on error. Also handle error properly
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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The dentry fid get clunked via the dput.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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There are two small cleanups in this patch:
- p9_errstr2errno was declared twice - remove one declaration.
- A uint8_t type was mixed in, change it to u8 to match
with the rest of the type names and remove dependency.
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Ron Minnich <rminnich@sandia.gov>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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The 9p client is currently undergoing regular regresssion and
stress testing as a by-product of the virtfs work. I think its
finally time to take off the experimental tags from the well-tested
code paths.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Typo fixes and minor cleanups for v9fs
Signed-off-by: Rob Landley <rob@landley.net>
Reviewed-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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As on Jeopardy, my question is in the form of a patch: Does this have
some special meaning, or is it an accident? (I looked at other
filesystems but they didn't bother having doc entries for their
init/exit function that I could find.)
Signed-off-by: Rob Landley <rob@landley.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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* 'for-2.6.40/splice' of git://git.kernel.dk/linux-2.6-block:
splice: add wakeup_pipe_readers()
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Add and use wakeup_pipe_readers() to consolidate duplicated codes.
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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* 'for-2.6.40/drivers' of git://git.kernel.dk/linux-2.6-block: (110 commits)
loop: handle on-demand devices correctly
loop: limit 'max_part' module param to DISK_MAX_PARTS
drbd: fix warning
drbd: fix warning
drbd: Fix spelling
drbd: fix schedule in atomic
drbd: Take a more conservative approach when deciding max_bio_size
drbd: Fixed state transitions after async outdate-peer-handler returned
drbd: Disallow the peer_disk_state to be D_OUTDATED while connected
drbd: Fix for the connection problems on high latency links
drbd: fix potential activity log refcount imbalance in error path
drbd: Only downgrade the disk state in case of disk failures
drbd: fix disconnect/reconnect loop, if ping-timeout == ping-int
drbd: fix potential distributed deadlock
lru_cache.h: fix comments referring to ts_ instead of lc_
drbd: Fix for application IO with the on-io-error=pass-on policy
xen/p2m: Add EXPORT_SYMBOL_GPL to the M2P override functions.
xen/p2m/m2p/gnttab: Support GNTMAP_host_map in the M2P override.
xen/blkback: don't fail empty barrier requests
xen/blkback: fix xenbus_transaction_start() hang caused by double xenbus_transaction_end()
...
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When finding or allocating a loop device, loop_probe() did not take
partition numbers into account so that it can result to a different
device. Consider following example:
$ sudo modprobe loop max_part=15
$ ls -l /dev/loop*
brw-rw---- 1 root disk 7, 0 2011-05-24 22:16 /dev/loop0
brw-rw---- 1 root disk 7, 16 2011-05-24 22:16 /dev/loop1
brw-rw---- 1 root disk 7, 32 2011-05-24 22:16 /dev/loop2
brw-rw---- 1 root disk 7, 48 2011-05-24 22:16 /dev/loop3
brw-rw---- 1 root disk 7, 64 2011-05-24 22:16 /dev/loop4
brw-rw---- 1 root disk 7, 80 2011-05-24 22:16 /dev/loop5
brw-rw---- 1 root disk 7, 96 2011-05-24 22:16 /dev/loop6
brw-rw---- 1 root disk 7, 112 2011-05-24 22:16 /dev/loop7
$ sudo mknod /dev/loop8 b 7 128
$ sudo losetup /dev/loop8 ~/temp/disk-with-3-parts.img
$ sudo losetup -a
/dev/loop128: [0805]:278201 (/home/namhyung/temp/disk-with-3-parts.img)
$ ls -l /dev/loop*
brw-rw---- 1 root disk 7, 0 2011-05-24 22:16 /dev/loop0
brw-rw---- 1 root disk 7, 16 2011-05-24 22:16 /dev/loop1
brw-rw---- 1 root disk 7, 2048 2011-05-24 22:18 /dev/loop128
brw-rw---- 1 root disk 7, 2049 2011-05-24 22:18 /dev/loop128p1
brw-rw---- 1 root disk 7, 2050 2011-05-24 22:18 /dev/loop128p2
brw-rw---- 1 root disk 7, 2051 2011-05-24 22:18 /dev/loop128p3
brw-rw---- 1 root disk 7, 32 2011-05-24 22:16 /dev/loop2
brw-rw---- 1 root disk 7, 48 2011-05-24 22:16 /dev/loop3
brw-rw---- 1 root disk 7, 64 2011-05-24 22:16 /dev/loop4
brw-rw---- 1 root disk 7, 80 2011-05-24 22:16 /dev/loop5
brw-rw---- 1 root disk 7, 96 2011-05-24 22:16 /dev/loop6
brw-rw---- 1 root disk 7, 112 2011-05-24 22:16 /dev/loop7
brw-r--r-- 1 root root 7, 128 2011-05-24 22:17 /dev/loop8
After this patch, /dev/loop8 - instead of /dev/loop128 - was
accessed correctly.
In addition, 'range' passed to blk_register_region() should
include all range of dev_t that LOOP_MAJOR can address. It does
not need to be limited by partition numbers unless 'max_loop'
param was specified.
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: Laurent Vivier <Laurent.Vivier@bull.net>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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The 'max_part' parameter controls the number of maximum partition
a loop block device can have. However if a user specifies very
large value it would exceed the limitation of device minor number
and can cause a kernel panic (or, at least, produce invalid
device nodes in some cases).
On my desktop system, following command kills the kernel. On qemu,
it triggers similar oops but the kernel was alive:
$ sudo modprobe loop max_part0000
------------[ cut here ]------------
kernel BUG at /media/Linux_Data/project/linux/fs/sysfs/group.c:65!
invalid opcode: 0000 [#1] SMP
last sysfs file:
CPU 0
Modules linked in: loop(+)
Pid: 43, comm: insmod Tainted: G W 2.6.39-qemu+ #155 Bochs Bochs
RIP: 0010:[<ffffffff8113ce61>] [<ffffffff8113ce61>] internal_create_group=
+0x2a/0x170
RSP: 0018:ffff880007b3fde8 EFLAGS: 00000246
RAX: 00000000ffffffef RBX: ffff880007b3d878 RCX: 00000000000007b4
RDX: ffffffff8152da50 RSI: 0000000000000000 RDI: ffff880007b3d878
RBP: ffff880007b3fe38 R08: ffff880007b3fde8 R09: 0000000000000000
R10: ffff88000783b4a8 R11: ffff880007b3d878 R12: ffffffff8152da50
R13: ffff880007b3d868 R14: 0000000000000000 R15: ffff880007b3d800
FS: 0000000002137880(0063) GS:ffff880007c00000(0000) knlGS:00000000000000=
00
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000422680 CR3: 0000000007b50000 CR4: 00000000000006b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 0000000000000000 DR7: 0000000000000000
Process insmod (pid: 43, threadinfo ffff880007b3e000, task ffff880007afb9c=
0)
Stack:
ffff880007b3fe58 ffffffff811e66dd ffff880007b3fe58 ffffffff811e570b
0000000000000010 ffff880007b3d800 ffff880007a7b390 ffff880007b3d868
0000000000400920 ffff880007b3d800 ffff880007b3fe48 ffffffff8113cfc8
Call Trace:
[<ffffffff811e66dd>] ? device_add+0x4bc/0x5af
[<ffffffff811e570b>] ? dev_set_name+0x3c/0x3e
[<ffffffff8113cfc8>] sysfs_create_group+0xe/0x12
[<ffffffff810b420e>] blk_trace_init_sysfs+0x14/0x16
[<ffffffff8116a090>] blk_register_queue+0x47/0xf7
[<ffffffff8116f527>] add_disk+0xdf/0x290
[<ffffffffa00060eb>] loop_init+0xeb/0x1b8 [loop]
[<ffffffffa0006000>] ? 0xffffffffa0005fff
[<ffffffff8100020a>] do_one_initcall+0x7a/0x12e
[<ffffffff81096804>] sys_init_module+0x9c/0x1e0
[<ffffffff813329bb>] system_call_fastpath+0x16/0x1b
Code: c3 55 48 89 e5 41 57 41 56 41 89 f6 41 55 41 54 49 89 d4 53 48 89 fb=
48 83 ec 28 48 85 ff 74 0b 85 f6 75 0b 48 83 7f 30 00 75 14 <0f> 0b eb fe =
48 83 7f 30 00 b9 ea ff ff ff 0f 84 18 01 00 00 49
RIP [<ffffffff8113ce61>] internal_create_group+0x2a/0x170
RSP <ffff880007b3fde8>
---[ end trace a123eb592043acad ]---
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: Laurent Vivier <Laurent.Vivier@bull.net>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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In file included from drivers/block/drbd/drbd_main.c:54: drivers/block/drbd/drbd_int.h:1190: warning: parameter has incomplete type
Forward declarations of enums do not work.
Fix it unpleasantly by moving the prototype.
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Lars Ellenberg <drbd-dev@lists.linbit.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
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Found these with the help of ispell -l.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
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An administrative detach used to request a state change directly to D_DISKLESS,
first suspending IO to avoid the last put_ldev() occuring from an endio handler,
potentially in irq context.
This is not enough on the receiving side (typically secondary), we may miss
some peer_req on the way to local disk, which then may do the last put_ldev()
from their drbd_peer_request_endio().
This patch makes the detach always go through the intermediate D_FAILED state.
We may consider to rename it D_DETACHING.
Alternative approach would be to create yet an other work item to be scheduled
on the worker, do the destructor work from there, and get the timing right.
manually picked commit 564040f from the drbd 8.4 branch.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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The old (optimistic) implementation could shrink the bio size
on an primary device.
Shrinking the bio size on a primary device is bad. Since there
we might get BIOs with the old (bigger) size shortly after
we published the new size.
The new implementation is more conservative, and eventually
increases the max_bio_size on a primary device (which is valid).
It does so, when it knows the local limit AND the remote limit.
We cache the last seen max_bio_size of the peer in the meta
data, and rely on that, to make the operation of single
nodes more efficient.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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It seems that the real cause of all the issues where that
we did not noticed in drbd_try_connect() when the other
guy closes one socket if the round trip time gets higher
than 100ms. There were that 100ms hard coded!
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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It is no longer sufficient to trigger on local WRITE,
we need to check on (rq_state & RQ_IN_ACT_LOG)
before calling drbd_al_complete_io also in the error path.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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If there is no replication traffic within the idle timeout
(ping-int seconds), DRBD will send a P_PING,
and adjust the timeout to ping-timeout.
If there is no P_PING_ACK received within this ping-timeout,
DRBD finally drops the connection, and tries to re-establish it.
To decide which timeout was active, we compared the current timeout
with the ping-timeout, and dropped the connection, if that was the case.
By default, ping-int is 10 seconds, ping-timeout is 500 ms.
Unfortunately, if you configure ping-timeout to be the same as ping-int,
expiry of the idle-timeout had been mistaken for a missing ping ack,
and caused an immediate reconnection attempt.
Fix:
Allow both timeouts to be equal, use a local variable
to store which timeout is active.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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We limit ourselves to a configurable maximum number of pages used as
temporary bio pages.
If the configured "max_buffers" is not big enough to match the bandwidth
of the respective deployment, a distributed deadlock could be triggered
by e.g. fast online verify and heavy application IO.
TCP connections would block on congestion, because both receivers
would wait on pages to become available.
Fortunately the respective senders in this case would be able to give
back some pages already. So do that.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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For some time we contemplated calling the "struct lru_cache"
a "struct tracked_set", and some comments kept the ts_ prefix.
Fix those to match the member field names.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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In case a write failes on the local disk, go into D_INCONSISTENT
disk state. That causes future reads of that block to be shipped
to the peer.
Read retry remote was already in place.
Actually the documentation needs to get fixed now. Since the
application is still shielded from the error. (as long as we have
only a single disk failing) The difference to detach is that
we keep the disk. And therefore might keep all the other, still
working sectors up to date.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen into for-2.6.40/drivers
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The sector number on empty barrier requests may (will?) be -1, which,
given that it's being treated as unsigned 64-bit quantity, will almost
always exceed the actual (virtual) disk's size.
Inspired by Konrad's "When writting barriers set the sector number to
zero...".
While at it also add overflow checking to the math in vbd_translate().
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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xenbus_transaction_end()
vbd_resize() up_read()'s xs_state.suspend_mutex twice in a row via double
xenbus_transaction_end() calls. The next down_read() in
xenbus_transaction_start() (at eg. the next resize attempt) hangs.
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=618317
Acked-by: Jan Beulich <jbeulich@novell.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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The recent changes caused this field of the structure to be offset a bit.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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And not depend on the driver being built with -DDEBUG flag.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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No need for that '_st' and xen_blkif is more apt.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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Not point of the blkif.h file. It is not used by the frontend.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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CHECK: multiple assignments should be avoided
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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Break up the macro usage.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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with more details.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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dir.
From the blkif.h header, which was exposed to the frontend.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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It is not really used for anything.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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To make it easier to read.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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And also make them uniform and prefix the message with 'xen-blkback'.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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Suggested-by: Ian Campbell <Ian.Campbell@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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They had the wrong data or were in the wrong spot.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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