xfs
[Top] [All Lists]

Re: linux 2.4.2-XFS

To: Steve Lord <lord@xxxxxxx>
Subject: Re: linux 2.4.2-XFS
From: Galen Arnold <arnoldg@xxxxxxxxxxxxx>
Date: Tue, 22 May 2001 11:40:10 -0500 (CDT)
Cc: <sandeen@xxxxxxx>, Mike Pflugmacher <mikep@xxxxxxxxxxxxx>, Wayne Hoyenga <louis@xxxxxxxxxxxxx>, <linux-xfs@xxxxxxxxxxx>
In-reply-to: <200105221635.f4MGZv511029@xxxxxxxxxxxxxxxxxxxx>
Sender: owner-linux-xfs@xxxxxxxxxxx
oops...there you go.
The patch you sent didn't apply with patch, but I was able to paste it in
manually--building and testing the new kernel now...

-Galen

On Tue, 22 May 2001, Steve Lord wrote:

> > Steve,
> >
> > The attached files were created with "/cat /proc/slabinfo" (my 2.4.2-XFS
> > doesn't show a slabcache).  slab.1 was written immediately after iozone
> > started, and slab.2 immediately after the first :
>
> Sorry slabinfo was what I meant, Hmm, I didn't get an attachment there.
>
> >
> >     __alloc_pages: 0-order allocation failed.
> >
> > (approximately 10s later).
> >
> > I'm looking at the patch now...
>
> I am not sure it will really help you - the memory it frees is inodes, so
> unless you have lots of inodes in cache it will not make a difference.
>
> Steve
>
> p.s. I presume you are using a HIGHMEM kernel.
>
> >
> > -Galen
> >
> >  On Tue, 22 May 2001,
> > Steve Lord wrote:
> >
> > >
> > > Try the attached patch - it is against the 2.4.4 development tree, but it
> > > should work in the release tree as well. I am still benchmarking and
> > > scratching my head about this one, but it should help memory usage in
> > > xfs. Is it possible to send the output of cat /proc/slabcache whilst
> > > iozone is on its way to failing?
> > >
> > > Steve
> > >
> > >
> > > > Eric,
> > > >
> > > > I found your name and address on a thread about linux & xfs.  I'm also
> > > > seeing the "kernel: __alloc_pages: 0-order allocation
> > > > failed." error on a 2.4.2-XFS system I just setup.  We're comparing 
> > > > ext2,
> > > > reiserfs, and xfs with iozone.  The xfs performance was looking great 
> > > > (50
> > %
> > > > better on writes than ext2 or reiserfs) until the box fell over 
> > > > scrolling
> > > > these errors.  It hangs the box and only a hard reset will suffice to
> > > > break out of it.
> > > >
> > > > I seem to be able to reproduce the error by running iozone this way:
> > > >
> > > >         iozone -s 4000m
> > > >
> > > > That's a big iozone run, but the systems all have 2gig memory so I've 
> > > > got
> > > > to go big to get out of linux cache and see meaningful numbers.  Has 
> > > > ther
> > e
> > > > been any progress with this bug?  If you'd like, I can get you a 
> > > > temporar
> > y
> > > > acct. on the system where I'm testing.
> > > >
> > > > -Galen
> > > >
> > > >  --
> > > > +
> > > > Galen Arnold, system engineer--systems group       arnoldg@xxxxxxxxxxxxx
> > > > National Center for Supercomputing Applications           (217) 244-3473
> > > > 152 Computer Applications Bldg., 605 E. Spfld. Ave., Champaign, IL 61820
> > >
> > >
> >
> > --
> > +
> > Galen Arnold, system engineer--systems group       arnoldg@xxxxxxxxxxxxx
> > National Center for Supercomputing Applications           (217) 244-3473
> > 152 Computer Applications Bldg., 605 E. Spfld. Ave., Champaign, IL 61820
>
>

-- 
+
Galen Arnold, system engineer--systems group       arnoldg@xxxxxxxxxxxxx
National Center for Supercomputing Applications           (217) 244-3473
152 Computer Applications Bldg., 605 E. Spfld. Ave., Champaign, IL 61820

Attachment: slab.2
Description: Text document

Attachment: slab.1
Description: Text document

<Prev in Thread] Current Thread [Next in Thread>