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d0a83a83bf
freebsd-nq/sys
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Alan Cox d0a83a83bf In order to map device memory using superpages, mmap(2) must find a 
superpage-aligned virtual address for the mapping.  Revision 1.65
implemented an overly simplistic and generally ineffectual method for
finding a superpage-aligned virtual address.  Specifically, it rounds
the virtual address corresponding to the end of the data segment up to
the next superpage-aligned virtual address.  If this virtual address
is unallocated, then the device will be mapped using superpages.
Unfortunately, in modern times, where applications like the X server
dynamically load much of their code, this virtual address is already
allocated.  In such cases, mmap(2) simply uses the first available
virtual address, which is not necessarily superpage aligned.

This revision changes mmap(2) to use a more robust method,
specifically, the VMFS_ALIGNED_SPACE option that is now implemented by
vm_map_find().
2008-05-17 19:32:48 +00:00
..
amd64 Removed unused assembly offsets for structures digging. 2008-05-16 13:23:47 +00:00
arm Add a stub for pmap_align_superpage() on machines that don't (yet) 2008-05-09 23:31:42 +00:00
boot Revert the previous change and let PROBE_KEYBOARD function identical to -P 2008-04-09 17:59:17 +00:00
bsm Merge OpenBSM 1.0 changes to src/sys/bsm: 2007-10-29 18:47:25 +00:00
cam Locking in the ses_ioctl handler doesn't have to be so strict because 2008-03-17 17:18:16 +00:00
cddl LO_ENROLLPEND is no more existing so just axe it (it was left out by the 2008-05-16 02:09:13 +00:00
compat Fix a panic when it occurred during initializing the ndis driver because 2008-05-15 04:29:28 +00:00
conf This is driver version 1.4.4 of the Intel ixgbe driver. 2008-05-16 18:46:30 +00:00
contrib Add code to allow the system to handle multiple routing tables. 2008-05-09 23:03:00 +00:00
crypto Make test00 compilable again. 2008-01-15 18:34:47 +00:00
ddb Rename debug.ddb.capture.bytes sysctl to debug.ddb.capture.bufoff in 2008-04-25 13:23:36 +00:00
dev Add support for the Nikon D300 camera 2008-05-16 19:47:15 +00:00
fs Fix and speedup timestamp calculations which is roughly based on the patch in 2008-05-16 22:31:17 +00:00
gdb Commit SYSINIT() ;-adding patch missed in previous pass. 2008-03-16 13:02:04 +00:00
geom Implement the G_PART_DUMPCONF method for all 6 schemes. Also call 2008-04-23 20:13:05 +00:00
gnu Move the head of byte-level advisory lock list from the 2008-04-16 11:33:32 +00:00
i4b Spelling fix for interupt -> interrupt 2007-10-12 06:03:46 +00:00
i386 Removed unused assembly offsets for structures digging. 2008-05-16 13:23:47 +00:00
ia64 Add a stub for pmap_align_superpage() on machines that don't (yet) 2008-05-09 23:31:42 +00:00
isa atrtc.c is a repocopy of the RTC device driver from i386/isa/clock.c 2008-04-14 07:57:15 +00:00
kern Attempt to improve convergence of POSIX semaphore code with style(9). 2008-05-16 18:10:07 +00:00
libkern Add prototype for __cmpd2(). 2008-02-23 22:40:05 +00:00
mips Add a stub for pmap_align_superpage() on machines that don't (yet) 2008-05-09 23:31:42 +00:00
modules Add the DTrace kernel module makefiles. 2008-05-17 02:31:19 +00:00
net The if_check() function performed three actions: 2008-05-17 03:38:13 +00:00
net80211 declare ieee80211_phymode_name with an array size 2008-05-12 00:34:28 +00:00
netatalk Add code to allow the system to handle multiple routing tables. 2008-05-09 23:03:00 +00:00
netatm Replaced the misleading uses of a historical artefact M_TRYWAIT with M_WAIT. 2008-03-25 09:39:02 +00:00
netgraph Add code to allow the system to handle multiple routing tables. 2008-05-09 23:03:00 +00:00
netinet Fix the loopback interface. Cleaning up some code with new macros 2008-05-12 02:44:53 +00:00
netinet6 Add code to allow the system to handle multiple routing tables. 2008-05-09 23:03:00 +00:00
netipsec Remove last bits of OS adaptation code from the IPSec code. 2008-05-17 04:00:11 +00:00
netipx Add code to allow the system to handle multiple routing tables. 2008-05-09 23:03:00 +00:00
netnatm
netncp lockmgrs need to be released before to be destroyed and draining doesn't 2008-03-30 18:16:33 +00:00
netsmb Really, smb_iod_main() is not totally MPSAFE, so just acquire and drop 2008-03-27 01:23:59 +00:00
nfs Replaced the misleading uses of a historical artefact M_TRYWAIT with M_WAIT. 2008-03-25 09:39:02 +00:00
nfs4client Add code to allow the system to handle multiple routing tables. 2008-05-09 23:03:00 +00:00
nfsclient Allow the block size used when booting over NFS to be overridden. It defaults 2008-05-16 06:27:03 +00:00
nfsserver Replaced the misleading uses of a historical artefact M_TRYWAIT with M_WAIT. 2008-03-25 09:39:02 +00:00
nlm Tighten up the error-handling in nlm_get_rpc. While I'm here, fix a 2008-04-16 09:09:50 +00:00
opencrypto Make ftruncate a 'struct file' operation rather than a vnode operation. 2008-01-07 20:05:19 +00:00
pc98 Expand kdb_alt_break a little, most commonly used with the option 2008-05-04 23:29:38 +00:00
pccard
pci - Set sc->dev to the new-bus device_t so all the device_printf()s work. 2008-05-12 21:34:52 +00:00
powerpc Removed unused assembly offsets for structures digging. 2008-05-16 13:23:47 +00:00
rpc Fix some issues that showed up during Kris' testing. 2008-04-11 10:34:59 +00:00
security When testing whether to enter the audit argument gathering code, rather 2008-05-06 00:32:23 +00:00
sparc64 Add a stub for pmap_align_superpage() on machines that don't (yet) 2008-05-09 23:31:42 +00:00
sun4v Add a stub for pmap_align_superpage() on machines that don't (yet) 2008-05-09 23:31:42 +00:00
sys Add the DTrace shim layer definitions. 2008-05-17 02:16:58 +00:00
tools Introduce a standalone shell script for embedding MFS image. 2008-02-05 10:46:30 +00:00
ufs - Use a local variable for i_ino in ufs_lookup. It is only used to 2008-04-22 12:34:16 +00:00
vm In order to map device memory using superpages, mmap(2) must find a 2008-05-17 19:32:48 +00:00
xdr Add the new kernel-mode NFS Lock Manager. To use it instead of the 2008-03-26 15:23:12 +00:00
Makefile o Add boot, gdb, nfsserver and opencrypto dirs to CSCOPEDIRS; sort. 2008-01-23 08:50:34 +00:00