Thanks Jamie, very useful information.
I see that on 2.6.22 kernels there is also the SLUB allocator. I have tried
it on my systems at times, but I have inexplicably seen some BUG statements
on the console, which has always made me switch back to SLAB.
Thanks again,
Harry
On 11/2/07, Jamie Lokier
Harry Gunnarsson wrote:
> > I thought that this was the point of the SLAB allocator, i.e.
> > avoiding fragmentations with fixed size pre-allocated blocks.
>
> Well, I'm not entirely certain how the SLAB allocator operates,
> since I haven't really looked at its code at all. Bu
advan wrote:
> I have one embedded device(mips R4000) with Kernel-2.4.25, it boots
>with a root filesystem in JFFS2 format (/dev/mtdblock1), I would like
>to switch the root filesystem to another in a RAMDISK with an ext2
>filesystem, but I can't umount the JFFS2 root file
Harry Gunnarsson wrote:
>Hm, you are saying one thing that gets me thinking. I assumed, perhaps
>incorrectly, that the 'chunks' of memory in the power-of-two scheme
>were pre-allocated at kernel start. That is, n * 128k, m * 256k, y *
>512k etc And I thought that the big c
Hi,
I'm developing a uClinux system running on MicroBlaze 7.00 on Spartan3E 1600
Dev Board using the new EDK 9.2. I have a couple of question to ask about.
First, does petaLinux support PLB? The MicroBlaze 7.00 supports PLB, but the
main memory can only choose from OPB types. I downloaded p
Hi,
I am running linux-2.4.17 on coldfire-5272 custom board,
the tool chain is m68k-elf-tools-20030314 downloaded from
http://www.uclinux.org/ports/coldfire/source.html.
with uClibc 0.9.19.
since I was getting node crashs when allocating memory,
I made a very simple test program as below:
#define
Earlier, I ran jffs2 root file system, which was per default mounted rw, and
I wanted it ro and 'noatime' set. SInce I couldn't make uClinux set it per
default, I came up with this; re-mounting '/' in the 'rc' script
mount -t jffs2 -o remount,noatime,ro /dev/rom1 /
So in your case, you could try
I see, assuming that the algorithm works as you lay out, for embedded usage
I would have preferred the fixed allocation scheme I first expected from
SLAB. And it would have been even better if one could select the number of
chunks of each size and fine tune it to its system (like OSE RTOS...)
Well,
hi,everyone
I have one embedded device(mips R4000) with Kernel-2.4.25, it boots with a
root filesystem in JFFS2 format (/dev/mtdblock1), I would like to switch the
root filesystem to another in a RAMDISK with an ext2 filesystem, but I can't
umount the JFFS2 root filesystem (device is busy). I
