[PATCH] Make address_space_operations->invalidatepage return void

[linux-2.6-omap-h63xx.git] / fs / bio.c

diff --git a/fs/bio.c b/fs/bio.c
index 1f3bb501c262bc9b94ad9e0b73c5af8acc511c90..73e664c01d30075064cc14b533d9d0d72b1d871f 100644 (file)
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -25,6 +25,7 @@
 #include <linux/module.h>
 #include <linux/mempool.h>
 #include <linux/workqueue.h>
+#include <linux/blktrace_api.h>
 #include <scsi/sg.h>           /* for struct sg_iovec */
 
 #define BIO_POOL_SIZE 256
@@ -635,12 +636,10 @@ static struct bio *__bio_map_user_iov(request_queue_t *q,
                return ERR_PTR(-ENOMEM);
 
        ret = -ENOMEM;
-       pages = kmalloc(nr_pages * sizeof(struct page *), GFP_KERNEL);
+       pages = kcalloc(nr_pages, sizeof(struct page *), GFP_KERNEL);
        if (!pages)
                goto out;
 
-       memset(pages, 0, nr_pages * sizeof(struct page *));
-
        for (i = 0; i < iov_count; i++) {
                unsigned long uaddr = (unsigned long)iov[i].iov_base;
                unsigned long len = iov[i].iov_len;
@@ -1095,6 +1094,9 @@ struct bio_pair *bio_split(struct bio *bi, mempool_t *pool, int first_sectors)
        if (!bp)
                return bp;
 
+       blk_add_trace_pdu_int(bdev_get_queue(bi->bi_bdev), BLK_TA_SPLIT, bi,
+                               bi->bi_sector + first_sectors);
+
        BUG_ON(bi->bi_vcnt != 1);
        BUG_ON(bi->bi_idx != 0);
        atomic_set(&bp->cnt, 3);
@@ -1182,12 +1184,11 @@ void bioset_free(struct bio_set *bs)
 
 struct bio_set *bioset_create(int bio_pool_size, int bvec_pool_size, int scale)
 {
-       struct bio_set *bs = kmalloc(sizeof(*bs), GFP_KERNEL);
+       struct bio_set *bs = kzalloc(sizeof(*bs), GFP_KERNEL);
 
        if (!bs)
                return NULL;
 
-       memset(bs, 0, sizeof(*bs));
        bs->bio_pool = mempool_create(bio_pool_size, mempool_alloc_slab,
                        mempool_free_slab, bio_slab);
 
@@ -1243,11 +1244,11 @@ static int __init init_bio(void)
                scale = 4;
 
        /*
-        * scale number of entries
+        * Limit number of entries reserved -- mempools are only used when
+        * the system is completely unable to allocate memory, so we only
+        * need enough to make progress.
         */
-       bvec_pool_entries = megabytes * 2;
-       if (bvec_pool_entries > 256)
-               bvec_pool_entries = 256;
+       bvec_pool_entries = 1 + scale;
 
        fs_bio_set = bioset_create(BIO_POOL_SIZE, bvec_pool_entries, scale);
        if (!fs_bio_set)