linux/mm
Andrew Morton d8733c2956 [PATCH] ext3_readdir: use generic readahead
Linus points out that ext3_readdir's readahead only cuts in when
ext3_readdir() is operating at the very start of the directory.  So for large
directories we end up performing no readahead at all and we suck.

So take it all out and use the core VM's page_cache_readahead().  This means
that ext3 directory reads will use all of readahead's dynamic sizing goop.

Note that we're using the directory's filp->f_ra to hold the readahead state,
but readahead is actually being performed against the underlying blockdev's
address_space.  Fortunately the readahead code is all set up to handle this.

Tested with printk.  It works.  I was struggling to find a real workload which
actually cared.

(The patch also exports page_cache_readahead() to GPL modules)

Cc: "Stephen C. Tweedie" <sct@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-23 07:38:09 -08:00
..
bootmem.c
fadvise.c
filemap_xip.c
filemap.c [PATCH] mm: make __put_page internal 2006-03-22 07:54:01 -08:00
filemap.h
fremap.c
highmem.c
hugetlb.c [PATCH] mm: hugetlb alloc_fresh_huge_page bogus node loop fix 2006-03-22 07:54:06 -08:00
internal.h [PATCH] remove set_page_count() outside mm/ 2006-03-22 07:54:02 -08:00
Kconfig [PATCH] page migration reorg 2006-03-22 07:54:06 -08:00
madvise.c
Makefile [PATCH] page migration reorg 2006-03-22 07:54:06 -08:00
memory_hotplug.c [PATCH] memory hotadd: pgdat->node_present_pages fix 2006-03-09 19:47:38 -08:00
memory.c [PATCH] hugepage: Fix hugepage logic in free_pgtables() harder 2006-03-22 07:54:04 -08:00
mempolicy.c [PATCH] page migration reorg 2006-03-22 07:54:06 -08:00
mempool.c [PATCH] mm: kill kmem_cache_t usage 2006-03-22 07:53:58 -08:00
migrate.c [PATCH] page migration reorg 2006-03-22 07:54:06 -08:00
mincore.c
mlock.c
mmap.c [PATCH] remove VM_DONTCOPY bogosities 2006-03-22 07:54:01 -08:00
mprotect.c [PATCH] Enable mprotect on huge pages 2006-03-22 07:54:03 -08:00
mremap.c
msync.c
nommu.c [PATCH] mm: nommu use compound pages 2006-03-22 07:54:01 -08:00
oom_kill.c [PATCH] out_of_memory() locking fix 2006-03-02 08:33:07 -08:00
page_alloc.c [PATCH] drain_node_pages: interrupt latency reduction / optimization 2006-03-22 07:54:06 -08:00
page_io.c
page-writeback.c
pdflush.c
prio_tree.c
readahead.c [PATCH] ext3_readdir: use generic readahead 2006-03-23 07:38:09 -08:00
rmap.c [PATCH] mm: more CONFIG_DEBUG_VM 2006-03-22 07:54:02 -08:00
shmem.c [PATCH] shmem: inline to avoid warning 2006-03-22 07:54:02 -08:00
slab.c [PATCH] mm: slab cache interleave rotor fix 2006-03-22 07:54:06 -08:00
slob.c
sparse.c
swap_state.c [PATCH] page migration reorg 2006-03-22 07:54:06 -08:00
swap.c [PATCH] mm: less atomic ops 2006-03-22 07:53:57 -08:00
swapfile.c [PATCH] swsusp: userland interface 2006-03-23 07:38:07 -08:00
thrash.c
tiny-shmem.c
truncate.c
util.c
vmalloc.c
vmscan.c [PATCH] page migration reorg 2006-03-22 07:54:06 -08:00