ffs meta layout policy

This is a more or less direct port of the kernel portion of a recent change Kirk McKusick recently made to FreeBSD. I'll link to his commit message which in turn links to lots of interesting reading, but the short version is that we can speed up both the filesystem and fsck by clustering metadata

[UPDATE] www/papers/index.html - Eric's OpenSMTPd presentation

Index: index.html === RCS file: /cvs/www/papers/index.html,v retrieving revision 1.166 diff -u -p -r1.166 index.html --- index.html 23 Mar 2013 17:56:07 - 1.166 +++ index.html 2 Apr 2013 13:01:44 - @@ -18,6 +18,13 @@

Fixing mkdir -p vs. systrace

If you spawn something like mkdir -p a mkdir -p a/b mkdir -p a/b/c in parallel on a multiprocessor box, you will sometimes get an error like mkdir: a/b: File exists. The whole point of mkdir(1)'s -p option is that this shouldn't happen. The problem was already fixed in revision 1.20 of

Re: [UPDATE] www/papers/index.html - Eric's OpenSMTPd presentation

On 04/02/2013 09:20 AM, Jiri B wrote: Index: index.html === RCS file: /cvs/www/papers/index.html,v retrieving revision 1.166 diff -u -p -r1.166 index.html --- index.html 23 Mar 2013 17:56:07 - 1.166 +++ index.html 2 Apr

Re: [UPDATE] www/papers/index.html - Eric's OpenSMTPd presentation

On Tue, Apr 02, 2013 at 01:17:03PM -0400, Nick Holland wrote: On 04/02/2013 09:20 AM, Jiri B wrote: Index: index.html === RCS file: /cvs/www/papers/index.html,v retrieving revision 1.166 diff -u -p -r1.166 index.html ---