WSL2-Linux-Kernel/ipc
Linus Torvalds fc8744adc8 Stop playing silly games with the VM_ACCOUNT flag
The mmap_region() code would temporarily set the VM_ACCOUNT flag for
anonymous shared mappings just to inform shmem_zero_setup() that it
should enable accounting for the resulting shm object.  It would then
clear the flag after calling ->mmap (for the /dev/zero case) or doing
shmem_zero_setup() (for the MAP_ANON case).

This just resulted in vma merge issues, but also made for just
unnecessary confusion.  Use the already-existing VM_NORESERVE flag for
this instead, and let shmem_{zero|file}_setup() just figure it out from
that.

This also happens to make it obvious that the new DRI2 GEM layer uses a
non-reserving backing store for its object allocation - which is quite
possibly not intentional.  But since I didn't want to change semantics
in this patch, I left it alone, and just updated the caller to use the
new flag semantics.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-31 15:08:56 -08:00
..
Makefile ipc: recompute msgmni on ipc namespace creation/removal 2008-04-29 08:06:12 -07:00
compat.c fix logic error in ipc compat semctl() 2007-07-06 10:23:43 -07:00
compat_mq.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ipc_sysctl.c ipc/ipc_sysctl.c: move the definition of ipc_auto_callback() 2009-01-06 15:59:29 -08:00
ipcns_notifier.c ipc: do not use a negative value to re-enable msgmni automatic recomputing 2008-07-25 10:53:42 -07:00
mqueue.c [CVE-2009-0029] System call wrappers part 26 2009-01-14 14:15:29 +01:00
msg.c [CVE-2009-0029] System call wrappers part 24 2009-01-14 14:15:28 +01:00
msgutil.c [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
namespace.c ipc: recompute msgmni on ipc namespace creation/removal 2008-04-29 08:06:12 -07:00
sem.c [CVE-2009-0029] System call wrappers part 25 2009-01-14 14:15:28 +01:00
shm.c Stop playing silly games with the VM_ACCOUNT flag 2009-01-31 15:08:56 -08:00
util.c sanitize audit_ipc_set_perm() 2009-01-04 15:14:40 -05:00
util.h ipc: get rid of ipc_lock_down() 2008-07-25 10:53:42 -07:00