Re: Kernel Panic: too few segs for DMA mapping increase AHC_NSEG

From: Jens Axboe (axboe@suse.de)
Date: Mon Nov 19 2001 - 04:44:11 EST

On Mon, Nov 19 2001, Marco Berizzi wrote:
> Hi everybody.
>
> I have just upgraded my PC from 768MB RAM to 1GB.
> I have recompiled the kernel (2.4.14) for hi mem support (4GB).
>
> Now it's appening a very strange behaviour.
> I have several file system on the same disk (vfat file system). I have
> compiled vfat driver as a module. So before try to mount I must issue a
> 'modprobe vfat'. I'm using Slackware 8.0. modutils version is 2.4.6
>
> Then if I try to copy a file from that filesystem to the root filesystem
> I get this error:
>
> Kernel panic: too few segs for DMA mappings increase AHC_NSEG

Aha! Finally someone that can provoke this easily. Could you please
apply attached patch and reproduce? Thanks. 

-- 
Jens Axboe
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This archive was generated by hypermail 2b29 : Fri Nov 23 2001 - 21:00:19 EST