 Messages in this thread DateThu, 15 Sep 2005 22:41:15 +0200
FromEric Dumazet <> SubjectRe: "Read my lips: no more merges" -
aka Linux 2.6.14-rc1 Benjamin LaHaise a écrit : > On Tue, Sep
13, 2005 at 09:04:32AM +0200, Eric Dumazet wrote: >>I wish a
process param could allow open() to take any free fd available,
>>not the lowest one. One can always use fcntl(fd, F_DUPFD,
slot) to move a >>fd on a specific high slot and always keep the
64 first fd slots free to >>speedup the kernel part at
open()/dup()/socket() time. > The overhead is easy to avoid by
making use of dup2() and close() to keep > the lowest file
descriptors in the table free, allowing open() and socket() > to
always return 3 or 4.  Yes, this is what I described :) Maybe
this was not clear.  > Alternatively, the kernel could track
available file descriptors using a > tree to efficiently insert
freed slots into an ordered list of free > regions (something
similar to the avl tree used in vmas). Is it worth > doing?
Well no, since a user app can manag