savannah: infinite loop reading large directories via fish

[slavazanko]

Original: ​http://savannah.gnu.org/bugs/?15801

Submitted by:	Mario Lorenz <mlo>	Submitted on:	Sun 19 Feb 2006 12:15:18 PM UTC
Category:	VFS	Severity:	3 - Normal
Status:	In Progress	Privacy:	Public
Assigned to:	Pavel Tsekov <ptsekov>	Open/Closed:	Open
Release:	4.6.1	Operating System:	GNU/Linux

Discussion:

Thu 23 Feb 2006 03:38:12 PM UTC, comment #1:



This problem has been bugging me for a while. I've just commited a patch 

which exposes a new user configurable option:



fish_directory_timeout



It contains the lifetime of a directory cache entry measured in seconds. 

I've adjusted the default value to 900 seconds (same as in ftpfs).



This option is not configurable through the user interface, yet - one 

can change it only by directly editing MC's ini file. I plan to fix this

soon.



To test the new code you need to fetch MC from the cvs repository or 

grab a snapshot.



Pavel Tsekov <ptsekov>

Project AdministratorIn charge of this item.

Sun 19 Feb 2006 12:15:18 PM UTC, original submission:



Reading large remote directories via fish (shell link)

over slow network links causes an infinite or at least very long

loop when mc tries to read the directory multiple times.



This is due to the fish directory timeout being hardcoded to 10 seconds,

whereas reading a 15000 entry directory via a 64kbit/s link will take

two minutes (way longer if not using compression). This means the

directory objects will be marked obsolete before the directory is even

loaded, causing an immediate reload once finished, with this pattern

sometimes repeating even more often.



That timeout should be tied to the (user settable) ftp directory 

timeout, or be given its own user settable value; at the very least it

should be set to a sane value (that is, >> 10 seconds).