From 5a7c9eec9fde1da0e3adf0a4ddb64ff2a324a492 Mon Sep 17 00:00:00 2001 From: Vivek Trivedi Date: Thu, 15 Mar 2012 23:58:52 +0530 Subject: [PATCH] NFS: fix sb->s_id in nfs debug prints NFS bdi flush thread in ps output is printed like "flush-:" For example: $ ps aux | grep flush 2079 root 0 SW [flush-0:18] ^^^^ nfs_bdi_register() ==> bdi_register_dev() ==> bdi_register(bdi, NULL, "%u:%u", MAJOR(dev), MINOR(dev)); ^^^^^ However, NFS sb->s_id store major:minor number in hex: nfs_initialise_sb() ==> snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); ^^^^^ If we enable nfs debug prints using command: $ rpcdebug -m nfs -s all write to a file: $ dd if=/dev/zero of=/testfile.txt bs=32768 count=1 Without Patch: [ 2431.032000] NFS: 0 initiated write call (req 0:12/40, 32768 bytes @ offset 0) ^^^^ With Patch: [ 2431.032000] NFS: 0 initiated write call (req 0:18/40, 32768 bytes @ offset 0) ^^^^ We should store NFS "s->s_id" in decimal to avoid confusion between NFS flush thread name(in ps output) and NFS debug prints. Signed-off-by: Vivek Trivedi Signed-off-by: Namjae Jeon Signed-off-by: Trond Myklebust --- fs/nfs/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/nfs/super.c b/fs/nfs/super.c index aac4030..ccc4cdb 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2115,7 +2115,7 @@ static inline void nfs_initialise_sb(struct super_block *sb) /* We probably want something more informative here */ snprintf(sb->s_id, sizeof(sb->s_id), - "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); + "%u:%u", MAJOR(sb->s_dev), MINOR(sb->s_dev)); if (sb->s_blocksize == 0) sb->s_blocksize = nfs_block_bits(server->wsize, -- 2.7.4