Looks good:
Reviewed-by: Christoph Hellwig
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early_lookup_bdev is supposed to only be called from the early boot
code, but mdtblock_early_get_bdev is called as a general fallback when
lookup_bdev fails, which is problematic because early_lookup_bdev
bypasses all normal path based permission checking, and might cause
problems with certain cont
early_lookup_bdev is now only used during the early boot code as it
should, so mark it __init to not waste run time memory on it.
Signed-off-by: Christoph Hellwig
---
block/early-lookup.c | 19 +--
include/linux/blkdev.h | 2 +-
2 files changed, 10 insertions(+), 11 deletions(
Create a new block/early-lookup.c to keep the early block device lookup
code instead of having this code sit with the early mount code.
Signed-off-by: Christoph Hellwig
---
.../admin-guide/kernel-parameters.txt | 2 +-
block/Makefile| 2 +-
block/early
Provide stubs for all the lower level mount helpers, and just switch
on ROOT_DEV in the main function.
Signed-off-by: Christoph Hellwig
---
init/do_mounts.c | 104 +--
1 file changed, 56 insertions(+), 48 deletions(-)
diff --git a/init/do_mounts.c b/i
Use the block_device acquired in dm_get_device for the check instead
of doing an extra lookup.
Signed-off-by: Christoph Hellwig
---
drivers/md/dm-snap.c | 14 +-
1 file changed, 5 insertions(+), 9 deletions(-)
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 9c49f53760
Instead of declaring root_device_name as a global variable pass it as an
argument to the funtions using it.
Signed-off-by: Christoph Hellwig
---
init/do_mounts.c| 29 -
init/do_mounts.h| 14 +++---
init/do_mounts_initrd.c | 11 ++-
3 fi
early_lookup_bdev is supposed to only be called from the early boot
code, but dm_get_device calls it as a general fallback when lookup_bdev
fails, which is problematic because early_lookup_bdev bypasses all normal
path based permission checking, and might cause problems with certain
container envir
Split the logic to find the resume device out software_resume and into
a separate helper to start unwindig the convoluted goto logic.
Signed-off-by: Christoph Hellwig
---
kernel/power/hibernate.c | 72 +---
1 file changed, 37 insertions(+), 35 deletions(-)
di
The nfs/cifs/ram special cass only need to be parsed once, and only in
the boot code. Move them out of name_to_dev_t and into
prepare_namespace.
Signed-off-by: Christoph Hellwig
---
init/do_mounts.c | 14 ++
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/init/do_mount
dm_init_init is called from early boot code, and thus lookup_bdev
will never succeed. Just open code that call to early_lookup_bdev
instead.
Signed-off-by: Christoph Hellwig
---
drivers/md/dm-init.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/md/dm-init.c b/dr
name_to_dev_t has a very misleading name, that doesn't make clear
it should only be used by the early init code, and also has a bad
calling convention that doesn't allow returning different kinds of
errors. Rename it to early_lookup_bdev to make the use case clear,
and return an errno, where -EINV
Remove all unused defines, and just use the expanded versions for
the scsi disk majors.
I've decided to keep Root_RAM0 even if it could be expanded as there
is a lot of special casing for it in the init code.
Signed-off-by: Christoph Hellwig
---
arch/alpha/kernel/setup.c | 2 +-
a
Simply add_device a bit by splitting out the cumbersome early boot logic
into a separate helper.
Signed-off-by: Christoph Hellwig
---
drivers/mtd/devices/block2mtd.c | 53 +++--
1 file changed, 30 insertions(+), 23 deletions(-)
diff --git a/drivers/mtd/devices/block2
Remove the code that drops the /dev/ prefix from root_device_name, which
is only used for error messages when mounting the root device fails.
Signed-off-by: Christoph Hellwig
---
init/do_mounts.c | 17 ++---
1 file changed, 6 insertions(+), 11 deletions(-)
diff --git a/init/do_mount
Open code dm_get_dev_t in the only remaining caller, and propagate the
exact error code from lookup_bdev and early_lookup_bdev.
Signed-off-by: Christoph Hellwig
---
drivers/md/dm-table.c | 20
include/linux/device-mapper.h | 2 --
2 files changed, 4 insertions(+), 1
The root_wait logic is a bit obsfucated right now. Expand it and move it
into a helper.
Signed-off-by: Christoph Hellwig
---
init/do_mounts.c | 32 ++--
1 file changed, 22 insertions(+), 10 deletions(-)
diff --git a/init/do_mounts.c b/init/do_mounts.c
index be6d1473
bool is the most sensible return value for a yes/no return. Also
add __init as this funtion is only called from the early boot code.
Signed-off-by: Christoph Hellwig
---
drivers/base/dd.c | 6 ++
include/linux/device/driver.h | 2 +-
init/do_mounts.c | 2 +-
3 files
resume_store is a sysfs attribute written during normal kernel runtime,
and it should not use the early_lookup_bdev API that bypasses all normal
path based permission checking, and might cause problems with certain
container environments renaming devices.
Switch to lookup_bdev, which does a normal
mount_block_root is also used to mount non-block file systems, so give
it a better name.
Signed-off-by: Christoph Hellwig
---
init/do_mounts.c| 6 +++---
init/do_mounts.h| 2 +-
init/do_mounts_initrd.c | 2 +-
3 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/init/do
Assign a Root_Generic magic value for UBI/MTD root and handle the root
mounting in mount_root like all other root types. Besides making the
code more clear this also means that UBI/MTD root can be used together
with an initrd (not that anyone should care).
Also factor parsing of the root name int
Hi all,
this series tries to sort out accumulated mess around the name_to_dev_t
function. This function is intended to allow looking up the dev_t of a
block device based on a name string before the root file systems is
mounted and thus the normal path based lookup is available.
Unfortunately a f
software_resume can be called either from an init call in the boot code,
or from sysfs once the system has finished booting, and the two
invocation methods this can't race with each other.
For the latter case we did just parse the suspend device manually, while
the former might not have one. Spli
Instead of only clearing root_wait in devt_from_partuuid when the UUID
format was invalid, do that in parse_root_device for all strings that
failed to parse.
Signed-off-by: Christoph Hellwig
---
init/do_mounts.c | 18 +++---
1 file changed, 11 insertions(+), 7 deletions(-)
diff --gi
blk_lookup_devt is only used by code in early-lookup.c, so move it
there.
printk_all_partitions and it's helper bdevt_str are only used by the
early init code in init/do_mounts.c, so they should go there as well.
Signed-off-by: Christoph Hellwig
---
block/early-lookup.c | 92 +
Passing call dependent variable in global variables is a huge
antipattern. Fix it up.
Signed-off-by: Christoph Hellwig
---
kernel/power/hibernate.c | 17 ++---
kernel/power/power.h | 3 +--
kernel/power/swap.c | 2 +-
3 files changed, 8 insertions(+), 14 deletions(-)
dif
On Mon, May 22, 2023 at 02:27:57PM -0400, Mike Snitzer wrote:
> On Fri, May 19 2023 at 7:07P -0400,
> Dave Chinner wrote:
>
> > On Fri, May 19, 2023 at 10:41:31AM -0400, Mike Snitzer wrote:
> > > On Fri, May 19 2023 at 12:09P -0400,
> > > Christoph Hellwig wrote:
> > >
> > > > FYI, I really do
On Tue, May 23 2023 at 10:05P -0400,
Brian Foster wrote:
> On Mon, May 22, 2023 at 02:27:57PM -0400, Mike Snitzer wrote:
> > On Fri, May 19 2023 at 7:07P -0400,
> > Dave Chinner wrote:
> >
...
> > > e.g. If the device takes a snapshot, it needs to reprovision the
> > > potential COW ranges tha
On Tue, May 23, 2023 at 09:45:12AM +0200, Christoph Hellwig wrote:
> bool is the most sensible return value for a yes/no return. Also
> add __init as this funtion is only called from the early boot code.
>
> Signed-off-by: Christoph Hellwig
> ---
> drivers/base/dd.c | 6 ++
> in
On Tue, May 23 2023 at 3:45P -0400,
Christoph Hellwig wrote:
> Open code dm_get_dev_t in the only remaining caller, and propagate the
> exact error code from lookup_bdev and early_lookup_bdev.
>
> Signed-off-by: Christoph Hellwig
> ---
> drivers/md/dm-table.c | 20
On Tue, May 23 2023 at 3:45P -0400,
Christoph Hellwig wrote:
> Use the block_device acquired in dm_get_device for the check instead
> of doing an extra lookup.
>
> Signed-off-by: Christoph Hellwig
Reviewed-by: Mike Snitzer
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On Tue, May 23 2023 at 3:45P -0400,
Christoph Hellwig wrote:
> dm_init_init is called from early boot code, and thus lookup_bdev
> will never succeed. Just open code that call to early_lookup_bdev
> instead.
>
> Signed-off-by: Christoph Hellwig
Reviewed-by: Mike Snitzer
--
dm-devel mailing
On Tue, May 23 2023 at 3:45P -0400,
Christoph Hellwig wrote:
> early_lookup_bdev is supposed to only be called from the early boot
> code, but dm_get_device calls it as a general fallback when lookup_bdev
> fails, which is problematic because early_lookup_bdev bypasses all normal
> path based pe
On Fri, May 19 2023 at 6:27P -0400,
Du Rui wrote:
> OverlayBD is a novel layering block-level image format, which is design
> for container, secure container and applicable to virtual machine,
> published in USENIX ATC '20
> https://www.usenix.org/system/files/atc20-li-huiba.pdf
>
> OverlayBD a
On Tue, May 23 2023 at 3:58P -0400,
Duoming Zhou wrote:
> In order to improve the IO performance of the dm-crypt
> implementation, the commit 39d42fa96ba1 ("dm crypt:
> add flags to optionally bypass kcryptd workqueues")
> adds tasklet to do the crypto operations.
>
> The tasklet callback funct
The dm-vdo target provides inline deduplication, compression, zero-block
elimination, and thin provisioning. A dm-vdo target can be backed by up to
256TB of storage, and can present a logical size of up to 4PB. This target
was originally developed at Permabit Technology Corp. starting in 2009. It
w
MurmurHash3 is a fast, non-cryptographic, 128-bit hash. It was originally
written by Austin Appleby and placed in the public domain. This version has
been modified to produce the same result on both big endian and little
endian processors, making it suitable for use in portable persistent data.
Si
This adds the admin-guide documentation for dm-vdo.
vdo.rst is the guide to using dm-vdo. vdo-design is an overview of the
design of dm-vdo.
Signed-off-by: J. corwin Coburn
---
.../admin-guide/device-mapper/vdo-design.rst | 390 ++
.../admin-guide/device-mapper/vdo.rst
This patch adds standardized allocation macros and memory tracking tools to
track and report any allocated memory that is not freed. This makes it
easier to ensure that the vdo target does not leak memory.
This patch also adds utilities for controlling whether certain threads are
allowed to alloca
Signed-off-by: J. corwin Coburn
---
drivers/md/dm-vdo/constants.c| 15 +
drivers/md/dm-vdo/constants.h| 102 +++
drivers/md/dm-vdo/release-versions.h | 20 ++
drivers/md/dm-vdo/status-codes.c | 126 +
drivers/md/dm-vdo/status-codes.h | 112
drivers/m
Add various support utilities for the vdo target and deduplication index,
including logging utilities, string and time management, and index-specific
error codes.
Signed-off-by: J. corwin Coburn
---
drivers/md/dm-vdo/errors.c | 316 +++
drivers/md/dm-vdo/errors.
This patch adds utilities for managing and using named threads, as well as
several locking and sychronization utilities. These utilities help dm-vdo
minimize thread transitions nad manage cross-thread interations.
Signed-off-by: J. corwin Coburn
---
drivers/md/dm-vdo/thread-cond-var.c | 46
Add structures which record the configuration of various deduplication
index parameters. This also includes facilities for saving and loading the
configuration and validating its integrity.
Signed-off-by: J. corwin Coburn
---
drivers/md/dm-vdo/config.c | 389 +++
This patch adds funnel_queue, a mostly lock-free multi-producer,
single-consumer queue. It also adds the request queue used by the dm-vdo
deduplication index, and the work_queue used by the dm-vdo data store. Both
of these are built on top of funnel queue and are intended to support the
dispatching
This patch adds infrastructure for managing reads and writes to the
underlying storage layer for the deduplication index. The deduplication
index uses dm-bufio for all of its reads and writes, so part of this
infrastructure is managing the various dm-bufio clients required. It also
adds the buffere
The delta index is a space and memory efficient alternative to a hashtable.
Instead of storing the entire key for each entry, the entries are sorted by
key and only the difference between adjacent keys (the delta) is stored.
If the keys are evenly distributed, the size of the deltas follows an
expo
Signed-off-by: J. corwin Coburn
---
drivers/md/dm-vdo/vio.c | 525
drivers/md/dm-vdo/vio.h | 221 +
2 files changed, 746 insertions(+)
create mode 100644 drivers/md/dm-vdo/vio.c
create mode 100644 drivers/md/dm-vdo/vio.h
diff --git a/dri
This patch adds the admin_state structures which are used to track the
states of individual vdo components for handling of operations like suspend
and resume. It also adds the action manager which is used to schedule and
manage cross-thread administrative and internal operations.
Signed-off-by: J.
Signed-off-by: J. corwin Coburn
---
drivers/md/dm-vdo/data-vio.c | 2076 ++
drivers/md/dm-vdo/data-vio.h | 683 +++
2 files changed, 2759 insertions(+)
create mode 100644 drivers/md/dm-vdo/data-vio.c
create mode 100644 drivers/md/dm-vdo/data-vio.h
diff
Signed-off-by: J. corwin Coburn
---
drivers/md/dm-vdo/dedupe.c | 622 +
drivers/md/dm-vdo/dedupe.h | 26 ++
2 files changed, 648 insertions(+)
diff --git a/drivers/md/dm-vdo/dedupe.c b/drivers/md/dm-vdo/dedupe.c
index 18c7509ef90..6ffecabd772 100644
--- a/dri
The io_submitter handles bio submission from vdo data store to the storage
below. It will merge bios when possible.
Signed-off-by: J. corwin Coburn
---
drivers/md/dm-vdo/io-submitter.c | 483 +++
drivers/md/dm-vdo/io-submitter.h | 52
2 files changed, 535 insert
When blocks do not deduplicate, vdo will attempt to compress them. Up to 14
compressed blocks may be packed into a single data block (this limitation
is imposed by the block map). The packer implements a simple best-fit
packing algorithm and also manages the formatting and writing of compressed
blo
In order to deduplicate concurrent writes of the same data (to different
locations), data_vios which are writing the same data are grouped together
in a "hash lock," named for and keyed by the hash of the data being
written. Each hash lock is assigned to a hash zone based on a portion of
its hash.
Most of the vdo volume belongs to the slab depot. The depot contains a
collection of slabs. The slabs can be up to 32GB, and are divided into
three sections. Most of a slab consists of a linear sequence of 4K blocks.
These blocks are used either to store data, or to hold portions of the
block map (
This patch adds support for handling incoming flush and/or FUA bios. Each
such bio is assigned to a struct vdo_flush. These are allocated as needed,
but there is always one kept in reserve in case allocations fail. In the
event of an allocation failure, bios may need to wait for an outstanding
flus
Signed-off-by: J. corwin Coburn
---
drivers/md/dm-vdo/slab-depot.c | 964 +
drivers/md/dm-vdo/slab-depot.h | 121 +
2 files changed, 1085 insertions(+)
diff --git a/drivers/md/dm-vdo/slab-depot.c b/drivers/md/dm-vdo/slab-depot.c
index 47707497eb5..0c3d66578e0
When a vdo is restarted after a crash, it will automatically attempt to
recover from its journals.
If a vdo encounters an unrecoverable error, it will enter read-only mode.
This mode indicates that some previously acknowledged data may have been
lost. The vdo may be instructed to rebuild as best i
Add support for dumping detailed vdo state to the kernel log via a dmsetup
message. The dump code is not thread-safe and is generally intended for use
only when the vdo is hung.
Signed-off-by: J. corwin Coburn
---
drivers/md/dm-vdo/dump.c | 288 +++
drivers/md
Signed-off-by: J. corwin Coburn
---
drivers/md/dm-vdo/message-stats.c | 1222 +
drivers/md/dm-vdo/message-stats.h | 13 +
drivers/md/dm-vdo/statistics.h| 279 +++
3 files changed, 1514 insertions(+)
create mode 100644 drivers/md/dm-vdo/message-stats.c
crea
This adds dm-vdo to the drivers/md Kconfig and Makefile.
Signed-off-by: J. corwin Coburn
---
drivers/md/Kconfig | 16
drivers/md/Makefile | 2 ++
2 files changed, 18 insertions(+)
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index b0a22e99bad..9fa9dec1029 100644
--- a
The block map contains the logical to physical mapping. It can be thought
of as an array with one entry per logical address. Each entry is 5 bytes:
36 bits contain the physical block number which holds the data for the
given logical address, and the remaining 4 bits are used to indicate the
nature
This patch adds two hash maps, one keyed by integers, the other by
pointers, and also a priority heap. The integer map is used for locking of
logical and physical addresses. The pointer map is used for managing
concurrent writes of the same data, ensuring that those writes are
deduplicated. The pri
The slab depot maintains an additional small data structure, the "slab
summary," which is used to reduce the amount of work needed to come back
online after a crash. The slab summary maintains an entry for each slab
indicating whether or not the slab has ever been used, whether it is clean
(i.e. al
Signed-off-by: J. corwin Coburn
---
drivers/md/dm-vdo/encodings.c | 1523 +
drivers/md/dm-vdo/encodings.h | 1307
2 files changed, 2830 insertions(+)
create mode 100644 drivers/md/dm-vdo/encodings.c
create mode 100644 drivers/md/dm-vd
The volume index is a large delta index that maps each record name to the
chapter which contains the newest record for that name. The volume index
can contain several million records and is stored entirely in memory while
the index is operating, accounting for the majority of the deduplication
inde
The recovery journal is used to amortize updates across the block map and
slab depot. Each write request causes an entry to be made in the journal.
Entries are either "data remappings" or "block map remappings." For a data
remapping, the journal records the logical address affected and its old and
Each slab is independent of every other. They are assigned to "physical
zones" in round-robin fashion. If there are P physical zones, then slab n
is assigned to zone n mod P. The set of slabs in each physical zone is
managed by a block allocator.
Signed-off-by: J. corwin Coburn
---
drivers/md/dm
The top-level deduplication index brings all the earlier components
together. The top-level index creates the separate zone structures that
enable the index to handle several requests in parallel, handles
dispatching requests to the right zones and components, and coordinates
metadata to ensure tha
The deduplication index interface for index clients includes the
deduplication request and index session structures. This is the interface
that the rest of the vdo target uses to make requests, receive responses,
and collect statistics.
This patch also adds sysfs nodes for inspecting various index
The set of leaf pages of the block map tree is too large to fit in memory,
so each block map zone maintains a cache of leaf pages. This patch adds the
implementation of that cache.
Signed-off-by: J. corwin Coburn
---
drivers/md/dm-vdo/block-map.c | 1230 +
drivers
Signed-off-by: J. corwin Coburn
---
drivers/md/dm-vdo/pool-sysfs-stats.c | 2063 ++
drivers/md/dm-vdo/pool-sysfs.c | 193 +++
drivers/md/dm-vdo/pool-sysfs.h | 19 +
drivers/md/dm-vdo/sysfs.c| 84 ++
4 files changed, 2359 insertions(+)
create m
Deduplication records are stored in groups called chapters. New records are
collected in a structure called the open chapter, which is optimized for
adding, removing, and sorting records.
When a chapter fills, it is packed into a read-only structure called a
closed chapter, which is optimized for
Signed-off-by: J. corwin Coburn
---
drivers/md/dm-vdo/vdo.c | 1846 +++
drivers/md/dm-vdo/vdo.h | 381
2 files changed, 2227 insertions(+)
create mode 100644 drivers/md/dm-vdo/vdo.c
create mode 100644 drivers/md/dm-vdo/vdo.h
diff --git a/drivers/md
This adds the dm-vdo target.
Signed-off-by: J. corwin Coburn
---
drivers/md/dm-vdo-target.c | 2983
1 file changed, 2983 insertions(+)
create mode 100644 drivers/md/dm-vdo-target.c
diff --git a/drivers/md/dm-vdo-target.c b/drivers/md/dm-vdo-target.c
new fil
The volume store structures manage the reading and writing of chapter
pages. When a chapter is closed, it is packed into a read-only structure,
split across several pages, and written to storage.
The volume store also contains a cache and specialized queues that sort and
batch requests by the page
On Tue, May 23, 2023 at 05:45:02PM -0400, J. corwin Coburn wrote:
> MurmurHash3 is a fast, non-cryptographic, 128-bit hash. It was originally
> written by Austin Appleby and placed in the public domain. This version has
> been modified to produce the same result on both big endian and little
> endi
On 5/23/23 6:06 PM, Eric Biggers wrote:
On Tue, May 23, 2023 at 05:45:02PM -0400, J. corwin Coburn wrote:
MurmurHash3 is a fast, non-cryptographic, 128-bit hash. It was originally
written by Austin Appleby and placed in the public domain. This version has
been modified to produce the same result
On Tue, May 23, 2023 at 05:45:03PM -0400, J. corwin Coburn wrote:
> diff --git a/drivers/md/dm-vdo/memory-alloc.c
> b/drivers/md/dm-vdo/memory-alloc.c
> new file mode 100644
> index 000..00b992e96bd
> --- /dev/null
> +++ b/drivers/md/dm-vdo/memory-alloc.c
> @@ -0,0 +1,447 @@
> +// SPDX-Lic
On Tue, May 23, 2023 at 06:13:08PM -0400, corwin wrote:
> On 5/23/23 6:06 PM, Eric Biggers wrote:
> > On Tue, May 23, 2023 at 05:45:02PM -0400, J. corwin Coburn wrote:
> > > MurmurHash3 is a fast, non-cryptographic, 128-bit hash. It was originally
> > > written by Austin Appleby and placed in the p
On Tue, May 23, 2023 at 05:45:00PM -0400, J. corwin Coburn wrote:
> The dm-vdo target provides inline deduplication, compression, zero-block
> elimination, and thin provisioning. A dm-vdo target can be backed by up to
> 256TB of storage, and can present a logical size of up to 4PB. This target
> wa
On Tue, May 23, 2023 at 10:25:01PM +, Eric Biggers wrote:
> On Tue, May 23, 2023 at 06:13:08PM -0400, corwin wrote:
> > On 5/23/23 6:06 PM, Eric Biggers wrote:
> > > On Tue, May 23, 2023 at 05:45:02PM -0400, J. corwin Coburn wrote:
> > > > MurmurHash3 is a fast, non-cryptographic, 128-bit hash.
On Tue, May 23, 2023 at 11:26:18AM -0400, Mike Snitzer wrote:
> On Tue, May 23 2023 at 10:05P -0400, Brian Foster wrote:
> > On Mon, May 22, 2023 at 02:27:57PM -0400, Mike Snitzer wrote:
> > ... since I also happen to think there is a potentially interesting
> > development path to make this sort
On 5/23/23 7:06 PM, Eric Biggers wrote:
> On Tue, May 23, 2023 at 10:25:01PM +, Eric Biggers wrote:
>> On Tue, May 23, 2023 at 06:13:08PM -0400, corwin wrote:
>>> On 5/23/23 6:06 PM, Eric Biggers wrote:
On Tue, May 23, 2023 at 05:45:02PM -0400, J. corwin Coburn wrote:
> MurmurHash3 is
On Tue, May 23, 2023 at 9:45 AM Christoph Hellwig wrote:
>
> Passing call dependent variable in global variables is a huge
> antipattern. Fix it up.
>
> Signed-off-by: Christoph Hellwig
Acked-by: Rafael J. Wysocki
> ---
> kernel/power/hibernate.c | 17 ++---
> kernel/power/power.
On Tue, May 23, 2023 at 9:46 AM Christoph Hellwig wrote:
>
> resume_store is a sysfs attribute written during normal kernel runtime,
> and it should not use the early_lookup_bdev API that bypasses all normal
> path based permission checking, and might cause problems with certain
> container enviro
On Tue, May 23, 2023 at 9:45 AM Christoph Hellwig wrote:
>
> Split the logic to find the resume device out software_resume and into
> a separate helper to start unwindig the convoluted goto logic.
>
> Signed-off-by: Christoph Hellwig
Acked-by: Rafael J. Wysocki
> ---
> kernel/power/hibernate.
On Mon, May 22, 2023 at 08:45:44PM +0900, Damien Le Moal wrote:
> On 5/22/23 19:41, Nitesh Shetty wrote:
> > Add device limits as sysfs entries,
> > - copy_offload (RW)
> > - copy_max_bytes (RW)
> > - copy_max_bytes_hw (RO)
> >
> > Above limits help to split the copy payloa
In order to improve the IO performance of the dm-crypt
implementation, the commit 39d42fa96ba1 ("dm crypt:
add flags to optionally bypass kcryptd workqueues")
adds tasklet to do the crypto operations.
The tasklet callback function kcryptd_crypt_tasklet()
calls kcryptd_crypt() which is an original
Hi Christoph,
h...@lst.de wrote on Tue, 23 May 2023 09:45:34 +0200:
> early_lookup_bdev is supposed to only be called from the early boot
> code, but mdtblock_early_get_bdev is called as a general fallback when
> lookup_bdev fails, which is problematic because early_lookup_bdev
> bypasses all nor
On Tue, May 23, 2023 at 9:45 AM Christoph Hellwig wrote:
>
> software_resume can be called either from an init call in the boot code,
> or from sysfs once the system has finished booting, and the two
> invocation methods this can't race with each other.
>
> For the latter case we did just parse th
Hi Mike,
On 2023/5/24 10:28, Mike Snitzer wrote:
On Fri, May 19 2023 at 6:27P -0400,
Du Rui wrote:
OverlayBD is a novel layering block-level image format, which is design
for container, secure container and applicable to virtual machine,
published in USENIX ATC '20
https://www.usenix.org/sys
Hi Christoph,
h...@lst.de wrote on Tue, 23 May 2023 09:45:33 +0200:
> Simply add_device a bit by splitting out the cumbersome early boot logic
I guess you meant "Simplify..."
Otherwise lgtm so,
Reviewed-by: Miquel Raynal
> into a separate helper.
>
> Signed-off-by: Christoph Hellwig
> ---
Hi corwin,
kernel test robot noticed the following build warnings:
[auto build test WARNING on device-mapper-dm/for-next]
[also build test WARNING on song-md/md-next linus/master v6.4-rc3 next-20230523]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting
On 5/23/23 00:45, Christoph Hellwig wrote:
> diff --git a/Documentation/admin-guide/kernel-parameters.txt
> b/Documentation/admin-guide/kernel-parameters.txt
> index f08b83e62c6222..3f8cf6dc7de887 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/k
On 5/23/23 21:58, Randy Dunlap wrote:
>
>
> On 5/23/23 00:45, Christoph Hellwig wrote:
>> diff --git a/Documentation/admin-guide/kernel-parameters.txt
>> b/Documentation/admin-guide/kernel-parameters.txt
>> index f08b83e62c6222..3f8cf6dc7de887 100644
>> --- a/Documentation/admin-guide/kernel-
On Tue, May 23, 2023 at 12:49:16PM -0400, Mike Snitzer wrote:
> > - dev = dm_get_dev_t(path);
> > - if (!dev)
> > + r = lookup_bdev(path, &dev);
> > + if (r)
> > + r = early_lookup_bdev(path, &dev);
> > + if (r)
> >
On Tue, May 23, 2023 at 09:59:50PM -0700, Randy Dunlap wrote:
> >>root= [KNL] Root filesystem
> >> - See early_lookup_bdev comment in init/do_mounts.c.
> >> + See early_lookup_bdev comment in block/early-lookup.c
> >
> > Patch 13 does this:
> >
> >
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