12.04.2017 20:21, Chris Murphy пишет:
> btrfs-map-logical is the tool that will convert logical to physical
> and also give what device it's on; but the device notation is copy 1
> and copy 2, so you have to infer what device that is, it's not
> explicit.
>
Actually I just checked with btrfsprogs
ronnie sahlberg posted on Fri, 14 Apr 2017 09:56:30 -0700 as excerpted:
> On Thu, Apr 13, 2017 at 8:47 PM, Duncan <1i5t5.dun...@cox.net> wrote:
>> Ank Ular posted on Thu, 13 Apr 2017 14:49:41 -0400 as excerpted:
> ...
>> OK, I'm one of the ones that's going to "go off" on you, but FWIW, I
>> expec
Thanks for the reply.
I mounted it ro:
$ sudo btrfs fi show /mnt
Segmentation fault (core dumped)
dmesg says:
...
kernel BUG at /build/linux-wXdoVv/linux-4.4.0/fs/btrfs/ctree.c:5205!
...
RIP: 0010:[] []
btrfs_search_forward+0x268/0x350 [btrfs]
...
Call Trace:
[] search_ioctl+0xf2/0x1
Hello,
backup harddisk connected via eSATA. Hard kernel hang, mouse pointer freezing
two times seemingly after finishing /home backup and creating new snapshot on
source BTRFS SSD RAID 1 for / in order to backup it. I did scrubbed / and it
appears to be okay, but I didn´t run btrfs check on it.
Hi Linus
Dave Sterba collected a few more fixes for the last rc:
git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs.git
for-linus-4.11
These aren't marked for stable, but I'm putting them in with a batch
were testing/sending by hand for this release.
Liu Bo (3) commits (+11/-13
Can you ro mount it and:
btrfs fi show /mnt
btrfs fi df /mnt
And then next update the btrfs-progs to something newer like 4.9.2 or
4.10.2 and then do another 'btrfs check' without repair. And then
separately do it again with --mode=lowmem and post both sets of
results?
Chris Murphy
--
To unsubs
On Fri, Apr 14, 2017 at 10:46 AM, Chris Murphy wrote:
>
> The passive repair works when it's a few bad sectors on the drive. But
> when it's piles of missing data, this is the wrong mode. It needs a
> limited scrub or balance to fix things. Right now you have to manually
> do a full scrub or bala
On Thu, Apr 13, 2017 at 8:47 PM, Duncan <1i5t5.dun...@cox.net> wrote:
> Ank Ular posted on Thu, 13 Apr 2017 14:49:41 -0400 as excerpted:
...
> OK, I'm one of the ones that's going to "go off" on you, but FWIW, I
> expect pretty much everyone else would pretty much agree. At least you
> do have bac
Summary: 22x device raid6 (data and metadata). One device vanished,
and the volume is rw,degraded mounted with writes happening; next time
it's mounted the formerly missing device is not missing so it's a
normal mount, and writes are happening. Then later, the filesystem
goes read only. Now there a
on 30.08.2016 at 02:48 Qu Wenruo wrote :
> Not the first, but although still few.
> There is a xfstest case submitted for it, and even before the test
case, there are already report from IRC.
> Anyway, I'll add Cc for you after the new IRC patch is out.
Please count me in.
I have this occur wh
From: Goldwyn Rodrigues
If IOCB_NOWAIT is set, bail if the i_rwsem is not lockable
immediately.
IF IOMAP_NOWAIT is set, return EAGAIN in xfs_file_iomap_begin
if it needs allocation either due to file extension, writing to a hole,
or COW or waiting for other DIOs to finish.
Signed-off-by: Goldwy
From: Goldwyn Rodrigues
Find out if the write will trigger a wait due to writeback. If yes,
return -EAGAIN.
This introduces a new function filemap_range_has_page() which
returns true if the file's mapping has a page within the range
mentioned.
Return -EINVAL for buffered AIO: there are multiple
From: Goldwyn Rodrigues
A new bio operation flag REQ_NOWAIT is introduced to identify bio's
orignating from iocb with IOCB_NOWAIT. This flag indicates
to return immediately if a request cannot be made instead
of retrying.
To facilitate this, QUEUE_FLAG_NOWAIT is set to devices
which support this
From: Goldwyn Rodrigues
Return EAGAIN if any of the following checks fail for direct I/O:
+ i_rwsem is lockable
+ Writing beyond end of file (will trigger allocation)
+ Blocks are not allocated at the write location
Signed-off-by: Goldwyn Rodrigues
---
fs/ext4/file.c | 20 +++
From: Goldwyn Rodrigues
IOCB_NOWAIT translates to IOMAP_NOWAIT for iomaps.
This is used by XFS in the XFS patch.
---
fs/iomap.c| 2 ++
include/linux/iomap.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/fs/iomap.c b/fs/iomap.c
index 141c3cd55a8b..d1c81753d411 100644
--- a/fs/
From: Goldwyn Rodrigues
Return EAGAIN if any of the following checks fail
+ i_rwsem is not lockable
+ NODATACOW or PREALLOC is not set
+ Cannot nocow at the desired location
+ Writing beyond end of file which is not allocated
Signed-off-by: Goldwyn Rodrigues
---
fs/btrfs/file.c | 25 +
From: Goldwyn Rodrigues
This flag informs kernel to bail out if an AIO request will block
for reasons such as file allocations, or a writeback triggered,
or would block while allocating requests while performing
direct I/O.
Unfortunately, aio_flags is not checked for validity, which would
break
From: Goldwyn Rodrigues
RWF_* flags is used for preadv2/pwritev2 calls. Port to use
it for aio operations as well. For this, aio_rw_flags is
introduced in struct iocb (using aio_reserved1) which will
carry these flags.
This is a precursor to the nowait AIO calls.
Note, the only place RWF_HIPRI
Formerly known as non-blocking AIO.
This series adds nonblocking feature to asynchronous I/O writes.
io_submit() can be delayed because of a number of reason:
- Block allocation for files
- Data writebacks for direct I/O
- Sleeping because of waiting to acquire i_rwsem
- Congested block device
Well, this may the follow up for the Btrfs/SSD discussion.
Probably nobody here had his hands on these Optane SSDs (or is it?)
Anyway, what are your expectations/projections about
memory/storage hybrid tech?
XPoint and/or any other tech will make memory and storage
eventually to converge.
With
Hi,
Sometime ago we had some discussion about SSDs.
Within the limits of unknown/undocumented device infos,
we loosely had covered data retension capability/disk age/life time
interrelations, (in?)effectiveness of btrfs dup on SSDs, etc..
Now, as time passed and with some accumulated experience on
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