Jens Axboe abf137dd77 aio: make the lookup_ioctx() lockless ... The mm->ioctx_list is currently protected by a reader-writer lock, so we always grab that lock on the read side for doing ioctx lookups. As the workload is extremely reader biased, turn this into an rcu hlist so we can make lookup_ioctx() lockless. Get rid of the rwlock and use a spinlock for providing update side exclusion. There's usually only 1 entry on this list, so it doesn't make sense to look into fancier data structures. Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>		2008-12-29 08:29:50 +01:00
..
cmm.c	[S390] cmm: remove unused binary sysctls.	2007-11-20 11:13:45 +01:00
extmem.c	[S390] convert dcssblk and extmem printks messages to pr_xxx macros.	2008-12-25 13:39:23 +01:00
fault.c	[S390] System z large page support.	2008-04-30 13:38:47 +02:00
hugetlbpage.c	hugetlb: introduce pud_huge	2008-07-24 10:47:18 -07:00
init.c	mm: cleanup to make remove_memory() arch-neutral	2008-10-20 08:50:25 -07:00
Makefile	[S390] guest page hinting light	2008-05-07 09:23:02 +02:00
mmap.c	[S390] dynamic page tables.	2008-02-09 18:24:41 +01:00
page-states.c	[S390] guest page hinting light	2008-05-07 09:23:02 +02:00
pgtable.c	aio: make the lookup_ioctx() lockless	2008-12-29 08:29:50 +01:00
vmem.c	[S390] vmemmap: fix off-by-one bug.	2008-06-10 10:03:27 +02:00