Re: [patch 6/12] hold atomic kmaps across generic_file_read

[Jeff Garzik]

Christoph Hellwig wrote:
> On Sat, Aug 10, 2002 at 02:52:49PM -0400, Jeff Garzik wrote:
> 
>>While working on a race-free rewrite of cp/mv/rm (suggested by Al), I 
>>did overall-time benchmarks on read+write versus sendfile/stat versus 
>>mmap/stat, and found that pretty much the fastest way under Linux 2.2, 
>>2.4, and solaris was read+write of PAGE_SIZE, or PAGE_SIZE*2 chunks. 
>>[obviously, 2.2 and solaris didn't do sendfile test]
> 
> 
> Solaris 9 (and Solaris 8 with a certain patch) support Linux-style
> sendfile().  Linux 2.5 on the other hand doesn't support sendfile to
> files anymore..

Really?  Bummer :)  That was a useful hack for some cases...