On Fri, Sep 16, 2011 at 07:00:55AM -0600, Matthew Wilcox wrote: > On Thu, Sep 15, 2011 at 04:06:46PM -0700, Andi Kleen wrote: > > Currently generic_file_llseek users synchronize all on the inode i_mutex, > > which is very heavy handed because it affects even different processes. > > > > This patchkit attempts to make generic_file_llseek (mostly) lockless. > > Yes, but, are there any real workloads which care? I know will-it-scale > says that lseek doesn't scale, but any real app which has a seek-heavy > workload is surely using pread()/pwrite() by now ... after all, they > were in UNIX98 so they've been a standard for 13 years. > Apparently postgresql uses lseek heavily http://rhaas.blogspot.com/2011/08/linux-and-glibc-scalability.html Thanks, Josef -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
