NFS bdi flush thread in ps output is printed like "flush-<major number in decimal>:<minor number in decimal>" 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=<NFS Mount>/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 <vtrivedi018@xxxxxxxxx> Signed-off-by: Namjae Jeon <linkinjeon@xxxxxxxxx> --- fs/nfs/super.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 3dfa4f1..d64bc3c 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2047,7 +2047,7 @@ 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, -- 1.7.8.4 -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html