linux-toradex.git/fs/bio.c, branch v2.6.19.2

[PATCH] fs/bio.c: tweaks

2006-10-11T18:14:25+00:00

- Calculate a variable in bvec_alloc_bs() only once needed, not earlier
  (bio.o down from 18408 to 18376 Bytes, 32 Bytes saved, probably due to
  data locality improvements).

- Init variable idx to silence a gcc warning which already existed in the
  unmodified original base file (bvec_alloc_bs() handles idx correctly, so
  there's no need for the warning):

	fs/bio.c: In function `bio_alloc_bioset':
	fs/bio.c:169: warning: `idx' may be used uninitialized in this function

Signed-off-by: Andreas Mohr 
Acked-by: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] Update axboe@suse.de email address

2006-09-30T18:52:34+00:00

As people often look for the copyright in files to see who to mail,
update the link to a neutral one.

Signed-off-by: Jens Axboe

[PATCH] fix creating zero sized bio mempools in low memory system

2006-09-30T18:52:33+00:00

In the very low memory systems is in the init_bio call
scale parameter set to zero and it leads to creating
zero sized mempool.

This patch prevents pool_entries parameter become zero,
so the created pool have at least 1 entry.

Mempool with 0 entries lead to incorrect behaviour
of mempool_free. (Alloc requests are not waken up
and system stalls in mempool_alloc->ioschedule).

Signed-off-by: Milan Broz 
Signed-off-by: Jens Axboe

[PATCH] Fix missing ret assignment in __bio_map_user() error path

2006-06-17T17:52:12+00:00

If get_user_pages() returns less pages than what we asked for, we jump
to out_unmap which will return ERR_PTR(ret).  But ret can contain a
positive number just smaller than local_nr_pages, so be sure to set it
to -EFAULT always.

Problem found and diagnosed by Damien Le Moal 

Signed-off-by: Jens Axboe 
Signed-off-by: Linus Torvalds

[PATCH] md: Make sure bi_max_vecs is set properly in bio_split

2006-05-23T17:35:31+00:00

Else a subsequent bio_clone might make a mess.

Signed-off-by: Neil Brown 
Cc: "Don Dupuis" 
Acked-by: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] mempool: use mempool_create_slab_pool()

2006-03-26T16:57:00+00:00

Modify well over a dozen mempool users to call mempool_create_slab_pool()
rather than calling mempool_create() with extra arguments, saving about 30
lines of code and increasing readability.

Signed-off-by: Matthew Dobson 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] mempool: use common mempool kmalloc allocator

2006-03-26T16:56:59+00:00

This patch changes several mempool users, all of which are basically just
wrappers around kmalloc(), to use the common mempool_kmalloc/kfree, rather
than their own wrapper function, removing a bunch of duplicated code.

Signed-off-by: Matthew Dobson 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] Use __read_mostly on some hot fs variables

2006-03-26T16:56:56+00:00

I discovered on oprofile hunting on a SMP platform that dentry lookups were
slowed down because d_hash_mask, d_hash_shift and dentry_hashtable were in
a cache line that contained inodes_stat.  So each time inodes_stats is
changed by a cpu, other cpus have to refill their cache line.

This patch moves some variables to the __read_mostly section, in order to
avoid false sharing.  RCU dentry lookups can go full speed.

Signed-off-by: Eric Dumazet 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] use kzalloc and kcalloc in core fs code

2006-03-25T16:23:00+00:00

Signed-off-by: Oliver Neukum 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] Block queue IO tracing support (blktrace) as of 2006-03-23

2006-03-23T19:00:26+00:00

Signed-off-by: Jens Axboe