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aa9bc3b171
freebsd-skq/sys
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Konstantin Belousov aa9bc3b171 Prevent parallel object collapses. Both vm_object_collapse_scan() and 
swap_pager_copy() might unlock the object, which allows the parallel
collapse to execute.  Besides destroying the object, it also might
move the reference from parent to the backing object, firing the
assertion ref_count == 1.

Collapses are prevented by bumping paging_in_progress counters on both
the object and its backing object.

Reported by:	cem
Tested by:	pho (previous version)
Reviewed by:	alc
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
X-Differential revision:	https://reviews.freebsd.org/D6085
2016-05-26 16:59:29 +00:00
..
amd64 Both Clang and GCC cannot generate efficient reserve_pv_entries(). 2016-05-25 23:06:52 +00:00
arm Enable USB PHY regulators when requested by the host controller driver. 2016-05-26 10:50:39 +00:00
arm64 Extract the correct bits from the GICD_TYPER register. The interrupt count 2016-05-20 15:43:51 +00:00
boot efi loader: Match format string to EFI_ERROR_CODE() 2016-05-25 00:13:01 +00:00
bsm
cam Fix a few ada(4) driver issues: 2016-05-25 01:37:39 +00:00
cddl Try to unbreak the build after r300611 by including the header 2016-05-24 17:38:27 +00:00
compat Define ATOMIC_LONG_INIT() in the LinuxKPI. 2016-05-26 10:03:22 +00:00
conf [gpiospi] add initial gpio SPI bit bang driver. 2016-05-26 07:20:33 +00:00
contrib Remove extraneous blank line. 2016-05-20 03:22:41 +00:00
crypto aesni(4): Initialize error before use 2016-04-20 03:05:32 +00:00
ddb Add a small set of logical operators to DDB command language. 2016-05-16 19:42:38 +00:00
dev Fix a typo in a comment. 2016-05-26 16:53:50 +00:00
fs Remove drop/reacquire of Giant around geom calls for cd9660 and udf. 2016-05-22 18:16:25 +00:00
gdb
geom Remove unneeded Giant locking around kthreads creation. 2016-05-20 08:28:11 +00:00
gnu Bring ralink/mediatek DTS files in sync with LEDE 2016-05-25 06:39:48 +00:00
i386 Add macro to convert errno and use it when appropriate. 2016-05-22 12:46:34 +00:00
isa sys/isa: minor spelling fixes. 2016-05-03 21:51:52 +00:00
kern Add support for boolean sysctl's. 2016-05-26 08:41:55 +00:00
kgssapi kgssapi: insignificant spelling fix. 2016-05-03 22:05:03 +00:00
libkern sys: Make use of our rounddown() macro when sys/param.h is available. 2016-04-30 14:41:18 +00:00
mips Build etherswitch support for appropriate Ralink/Mediatek SoCs 2016-05-25 06:47:28 +00:00
modules Bring in the Mellanox implementation of iSER (iSCSI over RDMA) initiator, 2016-05-26 09:49:29 +00:00
net Change net.link.log_promisc_mode_change to a read-only tunable 2016-05-25 09:00:05 +00:00
net80211 ifconfig: set by default FCC regulatory domain for wireless interfaces. 2016-05-26 13:14:08 +00:00
netgraph sys/netgraph: spelling fixes in comments. 2016-04-29 21:25:05 +00:00
netinet Make struct sctp_paddrthlds compliant to RFC 7829. 2016-05-26 11:38:26 +00:00
netinet6 Mark the prefix and default router list sysctl handlers MPSAFE. 2016-05-23 20:18:11 +00:00
netipsec netipsec: Fix minor style nit 2016-05-10 20:14:11 +00:00
netnatm kernel: use our nitems() macro when it is available through param.h. 2016-04-19 23:48:27 +00:00
netpfil pf: Fix more ICMP mistranslation 2016-05-23 13:59:48 +00:00
netsmb sys/net*: minor spelling fixes. 2016-05-03 18:05:43 +00:00
nfs NFS: spelling fixes on comments. 2016-04-29 16:07:25 +00:00
nfsclient
nfsserver
nlm Remove slightly used const values that can be replaced with nitems(). 2016-04-21 15:38:28 +00:00
ofed Prepare for activation of LinuxKPI module parameters as read-only 2016-05-25 12:03:21 +00:00
opencrypto sys/opencrypto: minor spelling fixes. 2016-05-06 23:37:19 +00:00
pc98 Move 'device pci' for the PCI bus driver to the MI NOTES file. 2016-04-29 23:53:55 +00:00
powerpc Fix the deciKelvin to Celsius conversion in kernel. 2016-05-22 13:58:32 +00:00
riscv Increase the size and alignment of the setjmp buffer. 2016-05-26 10:03:30 +00:00
rpc Remove unnecessary memset(.., 0, ..)'s 2016-05-24 20:06:41 +00:00
security sys/security: minor spelling fixes. 2016-05-06 16:59:04 +00:00
sparc64 Add macro to convert errno and use it when appropriate. 2016-05-22 12:46:34 +00:00
sys Add support for boolean sysctl's. 2016-05-26 08:41:55 +00:00
teken
tests
tools
ufs arc4random() returns 0 to (2**32)−1, use an alternative to initialize 2016-05-22 14:31:20 +00:00
vm Prevent parallel object collapses. Both vm_object_collapse_scan() and 2016-05-26 16:59:29 +00:00
x86 Only calibrate ICR read loop when not in x2APIC mode. Run-time 2016-05-26 09:09:11 +00:00
xdr RPC: for pointers replace 0 with NULL. 2016-04-14 17:06:37 +00:00
xen Don't repeat the the word 'the' 2016-05-17 12:52:31 +00:00
Makefile