diff options
author | Eric Dumazet <dada1@cosmosbay.com> | 2007-05-08 03:26:18 -0400 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 14:15:03 -0400 |
commit | c23fbb6bcb3eb9cdf39a103edadf57bde8ce309c (patch) | |
tree | d79ab2278774de2c1a8061aa948ed068902e87b4 /include/asm-i386/parport.h | |
parent | 2793274298c4423d79701e9a8190f2940bf3c785 (diff) |
VFS: delay the dentry name generation on sockets and pipes
1) Introduces a new method in 'struct dentry_operations'. This method
called d_dname() might be called from d_path() to build a pathname for
special filesystems. It is called without locks.
Future patches (if we succeed in having one common dentry for all
pipes/sockets) may need to change prototype of this method, but we now
use : char *d_dname(struct dentry *dentry, char *buffer, int buflen);
2) Adds a dynamic_dname() helper function that eases d_dname() implementations
3) Defines d_dname method for sockets : No more sprintf() at socket
creation. This is delayed up to the moment someone does an access to
/proc/pid/fd/...
4) Defines d_dname method for pipes : No more sprintf() at pipe
creation. This is delayed up to the moment someone does an access to
/proc/pid/fd/...
A benchmark consisting of 1.000.000 calls to pipe()/close()/close() gives a
*nice* speedup on my Pentium(M) 1.6 Ghz :
3.090 s instead of 3.450 s
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Acked-by: Christoph Hellwig <hch@infradead.org>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-i386/parport.h')
0 files changed, 0 insertions, 0 deletions