lkml.org 
[lkml]   [2001]   [Dec]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Removing an executable while it runs
Brian Gerst wrote:
>
> Cyrille Beraud wrote:
> >
> > Hello,
> > I would like to remove an executable from the file-system while it is
> > running and
> > get all the blocks back immediately, not after the end of the program.
> > Is this possible ?
> > From what I understand, the inode is not released until the program
> > ends. Do all the
> > file-systems behave the same way ?
> >
> > Thank you for your help.
>
> It is not possible to reclaim the disk space until the program exits.
> This is because of demand paging of executables. The file must be kept
> around to handle possible future page faults, otherwise the program
> would crash if it called code that hadn't been loaded yet or was
> discarded due to memory pressure. This is true of all filesystems.

Couldn't you use mlockall() to ensure that demand paging is not a factor? Then
you should be able to free up the disk space since the actual application is
guaranteed to be in ram.

Chris

--
Chris Friesen | MailStop: 043/33/F10
Nortel Networks | work: (613) 765-0557
3500 Carling Avenue | fax: (613) 765-2986
Nepean, ON K2H 8E9 Canada | email: cfriesen@nortelnetworks.com
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:18    [W:0.058 / U:6.344 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site