Re: [PATCH] new version of singlecopy pipe

[J . A . Magallon]

On 05.11 Manfred Spraul wrote:
> 
> Please test it.
> The kernel space part should be ok, but I know that the
> patch can cause deadlocks with buggy user space apps.
> 

I tried your patch on 2.4.4-ac8, and something strange happens.
Untarring linux-2.4.4 takes a little time, disk light flashes,
but no files appear on the disk (just 'Makefile', as you will see below).
Doing a separate gunzip - tar xf works fine:

werewolf:~/soft/kernel# gtar zxf linux-2.4.4.tar.gz
werewolf:~/soft/kernel# ls linux-2.4.4
Makefile
werewolf:~/soft/kernel# sync
werewolf:~/soft/kernel# ls linux-2.4.4
Makefile
werewolf:~/soft/kernel# gunzip linux-2.4.4.tar.gz
werewolf:~/soft/kernel# tar xf linux-2.4.4.tar
werewolf:~/soft/kernel# ls linux-2.4.4
COPYING         MAINTAINERS  REPORTING-BUGS  drivers/  init/    lib/  scripts/
CREDITS         Makefile     Rules.make      fs/       ipc/     mm/
Documentation/  README       arch/           include/  kernel/  net/

Some buffers get not flushed ???

If they can interact with yours, I have also applied the patches for
- cache-align from Andrea (I suppose it has nothing to do with yours)
- context-switches reduction by Mike Galbraith (perhaps ?)
and a silly couple more (CC:=$(CC) in Makefile, missing return in aic7xxx).

-- 
J.A. Magallon                           #  Let the source be with you...        
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Linux Mandrake release 8.1 (Cooker) for i586
Linux werewolf 2.4.4-ac8 #1 SMP Sat May 12 01:16:37 CEST 2001 i686