-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Wed, 6 Jul 2005, Neil Brown wrote:
It was against ... 2.6.12-mm1 or similar I think. Looks like the bug didn't get to main-line until just before the fix, which it good. 2.6.10-as7 seems to have a different though related bug. It contains the patch: http://www.acm.cs.rpi.edu/~dilinger/patches/2.6.10/as7/linux-2.6.10-as7/051-md_sync_page_io_max_vecs.patch which contains: diff -Nru a/drivers/md/md.c b/drivers/md/md.c --- a/drivers/md/md.c 2005-01-22 00:16:02 -08:00 +++ b/drivers/md/md.c 2005-01-22 00:16:02 -08:00 @@ -332,29 +332,26 @@ static int sync_page_io(struct block_device *bdev, sector_t sector, int size, struct page *page, int rw) { - struct bio bio; - struct bio_vec vec; + struct bio *bio = bio_alloc(GFP_KERNEL, 1); struct completion event; + int ret; + + bio_get(bio); .... + bio_put(bio); + return ret; } bio_alloc sets the refcount to 1. bio_get increments it to 2. bio_put sets it back to 1. But it never reaches zero. You want to get rid of that bio_get near the top of sync_page_io.
Applying this fix I still 'seem' to run out of memory with `top`, but bio and biovec are no longer insane: $ slabtop Active / Total Objects (% used) : 77209 / 156871 (49.2%) Active / Total Slabs (% used) : 5203 / 5211 (99.8%) Active / Total Caches (% used) : 66 / 101 (65.3%) Active / Total Size (% used) : 11391.00K / 20616.61K (55.3%) Minimum / Average / Maximum Object : 0.01K / 0.13K / 128.00K 65400 38946 59% 0.05K 872 75 3488K buffer_head 31476 7412 23% 0.06K 516 61 2064K size-64 14546 9797 67% 0.27K 1039 14 4156K radix_tree_node 13717 4024 29% 0.13K 473 29 1892K dentry_cache 11363 2691 23% 0.35K 1033 11 4132K reiser_inode_cache 4522 3005 66% 0.03K 38 119 152K size-32 3713 2605 70% 0.08K 79 47 316K vm_area_struct 1953 1953 100% 0.12K 63 31 252K size-128 1221 650 53% 0.01K 3 407 12K anon_vma 925 710 76% 0.16K 37 25 148K filp 784 645 82% 0.28K 56 14 224K inode_cache 546 216 39% 0.29K 42 13 168K proc_inode_cache 460 280 60% 0.19K 23 20 92K skbuff_head_cache 452 263 58% 0.02K 2 226 8K biovec-1 410 302 73% 0.09K 10 41 40K bio 350 330 94% 0.37K 35 10 140K shmem_inode_cache 305 256 83% 0.06K 5 61 20K biovec-4 280 257 91% 0.75K 56 5 224K biovec-64 260 257 98% 0.19K 13 20 52K biovec-16 260 256 98% 1.50K 52 5 416K biovec-128 256 256 100% 3.00K 128 2 1024K biovec-(256) 254 187 73% 2.00K 127 2 508K size-2048 226 24 10% 0.02K 1 226 4K tcp_bind_bucket ... Thanks for the fix! (tested on a 2.6.10-as7 kernel) - -sandalle - -- Eric Sandall | Source Mage GNU/Linux Developer eric@xxxxxxxxxx | http://www.sourcemage.org/ http://eric.sandall.us/ | SysAdmin @ Inst. Shock Physics @ WSU http://counter.li.org/ #196285 | http://www.shock.wsu.edu/ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFC2eQrHXt9dKjv3WERAiS/AJ9lvx+pUiDcpLe1HR5D669iQERSzACaA3UN tvg0ENq/c4qx/z8G5d27nWk= =82kA -----END PGP SIGNATURE----- - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
