Specifically on an SMP kernel it was observed that if both the
processors are doing an exit1() via ast()->postsig()->sigexit()
then we will deadlock.
This happens because exit1() calls vmspace_exit() that in turn
calls pmap_invalidate_all(). This function tries to do a
smp_rendezvous() which blocks because the other processor is not
responding to IPIs - because it too is doing AST processing with
interrupts disabled.
http://www.freebsd.org/cgi/query-pr.cgi?pr=bin/143350
Empty string test gone wrong.
Testing this requires that you have a locale that has the sign string
unset but has int_n_sign_posn set (the default locale falls through to
use "()" around negative numbers which is probably another bug).
I created that setup by hand and indeed without this fix negative
numbers are put out as positive numbers (doesn't fall through to use
"-" as default indicator).
Unfixed example in nl_NL.ISO8859-1 with lc->negative_sign set to empty
string:
strfmon(buf, sizeof(buf), "%-8i", -42.0);
==>
example2: 'EUR 42,00' 'Eu 42,00'
Fixed:
example2: 'EUR 42,00-' 'Eu 42,00-'
This file and suggested fix are identical in at least freebsd-8.
Backport might be appropriate but some expert on locales should
probably have a look at us defaulting to negative numbers in
parenthesis when LC_* is default. That doesn't look right and is not
what other OSes are doing.
PR: 143350
Submitted by: Corinna Vinschen
Reviewed by: bug reporter submitted, tested by me
remove the NFS server version in order to reduce code duplication.
The shared version now uses a second parameter how, which is passed
on to m_get(9) and m_getcl(9) as the server used M_WAIT while the
client requires M_DONTWAIT, and replaces the the previously unused
parameter hsiz.
- Change nfs_realign() to use nfsm_aligned() so as with other NFS code
the alignment check isn't actually performed on platforms without
strict alignment requirements for performance reasons because as the
comment suggests unaligned data only occasionally occurs with TCP.
- Change fha_extract_info() to use nfs_realign() with M_DONTWAIT rather
than M_WAIT because it's called with the RPC sp_lock held.
Reviewed by: jhb, rmacklem
MFC after: 1 week
ordered call lists. Try to lookup function/symbol names and print
those in addition to the pointers, along with the constants for
subsystem and order.
This is useful for debugging vnet teardown ordering issues.
Make it possible to call the actual printing frunction from normal
code at runtime, ie. from vnet_sysuninit(), if DDB support is there.
Sponsored by: ISPsystem
MFC After: 8 days
this matches the Linux behavior.
- Check if we have sufficient space allocated for socket structure, which
fixes a buffer overflow when wrong length is being passed into the
emulation layer. [1]
PR: kern/138860
Submitted by: Mateusz Guzik <mjguzik gmail com>
Reported by: Alexander Best [1]
MFC after: 2 weeks
and vnet_destroy.
Use the line number rather than NULL as dummy argument.
Note: the fbt provider does not reliably provide :return probes
(depending on optimization levels used at compile time) making
it unusable for scripts to generate complete call-traces with
well defined boundaries over allocations or destructions of
virtual network stacks.
Sponsored by: ISPsystem
MFC After: 8 days
tearing down a network stack (in the VIMAGE jail+vnet case).
For that break out the logic from tcp_hc_purge() into an internal
function we can call from both, the sysctl handler and the
tcp_hc_destroy().
Sponsored by: ISPsystem
Reviewed by: silby, lstewart
MFC After: 8 days
This structure is deprecated and only used by ftime(2), which is part of
libcompat. The second argument of get_date() is unused, which means we
can just remove it entirely.
The softc obtained in device probe wouldn't be the same one used in
device attach. Drivers should not assume any values stored in softc
structure in probe routine will be available for its attach routine.
ports tree extensively and it is probably a good idea to keep it
regardless of NO_MAIL setting.
Reported by: Alexander Best
Reviewed by: antoine
X-MFC-With: r203584
interfaces (such as when you are part of a carp pool), and you run
rpcbind -h to restrict which interfaces have rpc services, rpcbind can
none-the-less return addresses that aren't in the -h list. This patch
enforces the rule that when you specify -h on the command line, then
services returned from rpcbind must be to one of the addresses listed
in -h, or be a loopback address (since localhost is implicit when
running -h).
The root cause of this is the assumption in addrmerge that there can
be only one interface that matches a given network IP address. This
turns out not to be the case. To retain historical behavior, I didn't
try to fix the routine to prefer the address that the request came
into, since I didn't know the side effects that might cause in the
normal case. My quick analysis suggests that it wouldn't be a
problem, but since this code is tricky I opted for the more
conservative patch of only restricting the reply when -h is in effect.
Hence, this change will have no effect when you are running rpcbind
without -h.
Reviewed by: alfred@
Sponsored by: iX Systems
MFC after: 2 weeks
due to careful design. We've not yet figured out how to properly
annotate the sockaddr structs to communicate this to the compiler and
there's a number of constructs in the tree that make this annotation
challenging.
As such, reduce warns to 3 here because this code really isn't warns 6
safe, even if it kinda sorta appears to be on intel (which has no such
alignment restrictions). Warns 4 adds the -Wcast-align warning.
# fixes the mips tinderbox build
This makes it a little easier to figure out which application was
responsible for this log entry. Ideally we should add an ut_process or
something similar.
Suggested by: Vincent Poy <vincepoy gmail com>
The platform that supports SMP currently is a SWARM with a dual-core Sibyte
processor. The kernel config file to use is SWARM_SMP.
Reviewed by: imp, rrs
obtain the memory map of the traced process. PT_VM_TIMESTAMP can be
used to check if the memory map changed since the last time to avoid
iterating over all the VM entries unnecesarily.
MFC after: 1 month
interface specifier on the command line can be ommited.
Besides of this, the bpf is being reused for each machine
that has to be woken up.
Submitted by: Marc Balmer <marc@msys.ch>
