Add the sysctl debug.iosize_max_clamp, enabled by default. Setting the
sysctl to zero allows to perform the SSIZE_MAX-sized i/o requests from
the usermode.
Discussed with: bde, das (previous versions)
MFC after: 1 month
types 0x05 and 0x0f, but 0x05 is preferred and used when partition is
created with "gpart add -t ebr ...".
This should keep EBR partitions accessible after r231754 for those,
who have EBR on the partition with type 0x0f.
- In case the parent is bge(4), don't set the Jumbo frame settings unless
the MAC actually is Jumbo capable as otherwise the PHY might not have the
corresponding registers implemented. This is also in line with what the
Linux tg3 driver does.
PR: 165032
Submitted by: Alexander Milanov
Obtained from: OpenBSD
MFC after: 3 days
hold the lock.
This is part of my series of work to try and capture when net80211
locking isn't.
ObNote: it'd be nice to be able to mark a lock as "assert if the lock
is dropped", so I could capture functions which decide that dropping
and reacquiring the lock is a good idea (without re-checking the
sanity of the state protected by the lock.)
Vnode-backed mappings cannot be put into the kernel map, since it is a
system map.
Use exec_map for transient mappings, and remove the mappings with
kmem_free_wakeup() to notify the waiters on available map space.
Do not map the whole executable into KVA at all to copy it out into
usermode. Directly use vn_rdwr() for the case of not page aligned
binary.
There is one place left where the potentially unbounded amount of data
is mapped into exec_map, namely, in the COFF image activator
enumeration of the needed shared libraries.
Reviewed by: alc
MFC after: 2 weeks
devices that are unplugged via QEMU.
sys/dev/xen/blkback/blkback.c:
Toolstack initiated closures change the frontend's state
to Closing. The backend must change to Closing as well,
even if we can't actually close yet, in order for the
frontend to notice and start the closing process.
MFC after: 3 days
- remove the KEVENT code, which was incomplete and not compiled anyways;
- change some while() loops into for()
- adjust indentation
- remove extra whitespace
MFC after: 1 week
struct ccb_pathinq from sys/cam/cam_ccb.h wasn't added to stable/7 at all
and didn't appear in stable/8 until svn R195534. Since __FreeBSD_version
did not get bumped until svn R195634, assume that maxio is valid at 800102
or higher.
Obtained from: Yahoo! Inc.
MFC after: 0 days
with RX/TX halting.
* Always disable/enable interrupts during a channel change, just to simply
things.
* Ensure that the ath taskqueue has completed and is paused before
continuing.
This dramatically reduces the instances of overlapping RX and reset
conditions.
PR: kern/165220
The previous code did not limit the I/O request size based on
the maximum number of segments supported by the back-end. In
current practice, since the only back-end supporting chained
requests is the FreeBSD implementation, this limit was never
exceeded.
sys/dev/xen/blkfront/block.h:
Add two macros, XBF_SEGS_TO_SIZE() and XBF_SIZE_TO_SEGS(),
to centralize the logic of reserving a segment to deal with
non-page-aligned I/Os.
sys/dev/xen/blkfront/blkfront.c:
o When negotiating transfer parameters, limit the
max_request_size we use and publish, if it is greater
than the maximum, unaligned, I/O we can support with
the number of segments advertised by the backend.
o Don't unilaterally reduce the I/O size published to
the disk layer by a single page. max_request_size
is already properly limited in the transfer parameter
negotiation code.
o Fix typos in printf strings:
"max_requests_segments" -> "max_request_segments"
"specificed" -> "specified"
MFC after: 1 day
- Make hash sizes growable, to satisfy users running large mpd
installations, having thousands of nodes.
- NG_NAMEHASH() proved to give a very bad distribution in real life
name sets, while generic hash32_str(name, HASHINIT) proved to give
an even one, so you the latter for name hash.
- Do not store unnamed nodes in slot 0 of name hash, no reason for that.
- Use the ID hash in cases when we need to run through all nodes: the
NGM_LISTNODES command and in the vnet_netgraph_uninit().
- Implement NGM_LISTNODES and NGM_LISTNAMES as separate code, the former
iterates through the ID hash, and the latter through the name hash.
- Keep count of all nodes and of named nodes, so that we don't need
to count nodes in NGM_LISTNODES and NGM_LISTNAMES. The counters are
also used to estimate whether we need to grow hashes.
- Close a race between two threads running ng_name_node() assigning same
name to different nodes.
messages were printed.
This can be enabled with the kern.msgbuf_show_timestamp sysctl
PR: kern/161553
Reviewed by: avg
Submitted by: Arnaud Lacombe <lacombar@gmail.com>
Approved by: cperciva
MFC after: 1 month
spinlock_enter()/spinlock_exit() to save/restore RFLAGS. We know interrupt
is disabled when returning from S3. For AP, we do not have to save/restore
it because IRET will do it for us any way. Do not save CR3 locally because
savectx() does it and BSP does not have to switch to kernel map for amd64.
Change contigmalloc(9) flag while I am in the neighborhood.
Introduce some functions to map NIC ring indexes into netmap ring
indexes and vice versa. This way we can implement the bound
checks only in one place (and hopefully in a correct way).
On passing, make the code and comments more uniform across the
various drivers.
Mask off the first 16 pages unless we appear to be running in a VM. This
address may be overridden by 'hw.physmem.start' tunable from loader.
Note Linux used to have a BIOS quirk table for this issue but it seems they
made it default recently.
