lkml.org 
[lkml]   [2001]   [Sep]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: major VM suckage with 2.4.10pre12 and 2.4.10pre13 and highmem, we will help test
Date
In article <F341E03C8ED6D311805E00902761278C04728F82@xfc04.fc.hp.com>,
HABBINGA,ERIK (HP-Loveland,ex1) <erik_habbinga@hp.com> wrote:
>Kernel 2.4.10pre13 did not help our NFS SPEC testing on a machine with 4GB
>RAM. Refer to my previous message about those results:
>http://lists.insecure.org/linux-kernel/2001/Sep/3036.html
>
>In a nutshell, kswapd starts grabbing 99% of the CPU for long stretches in
>time, which causes us to drop NFS RPC connections, which causes performance
>to suck.

Duh.

No wonder.

There's this test in page_alloc.c that tests for atomic allocations the
wrong way - it uses "(gfp_mask & __GFP_HIGH)", when the test _should_ be
"!(gfp_mask & __GFP_WAIT)".

Which causes regular kernel allocations to eat into the reserved memory
pool. Which in turn makes the _real_ atomic allocations really rather
unhappy (resulting in lost packets - which pretty much guarantees sucky
NFS performance ;).

And it probably doesn't make kswapd that happy either...

You can either fix that single line, or try out pre14 which cleans up
some other things too..

Linus

-----
pre14:
- Richard Gooch: devfs update
- Andrea Arcangeli: clean up/fix ramdisk handling now that it's in page cache
- Al Viro: follow up the above with initrd cleanups
- Keith Owens: get rid of drivers/scsi/53c700-mem.c file
- Trond Myklebust: RPC over TCP race fix
- Greg KH: USB update (ohci understands USB_ZERO_PACKET)
- me: clean up reference bit handling, fix silly GFP_ATOMIC allocation bug

pre13:
- Manfred Spraul: /proc/pid/maps cleanup (and bugfix for non-x86)
- Al Viro: "block device fs" - cleanup of page cache handling
- Hugh Dickins: VM/shmem cleanups and swap search speedup
- David Miller: sparc updates, soc driver typo fix, net updates
- Jeff Garzik: network driver updates (dl2k, yellowfin and tulip)
- Neil Brown: knfsd cleanups and fixues
- Ben LaHaise: zap_page_range merge from -ac

pre12:
- Alan Cox: much more merging
- Pete Zaitcev: ymfpci race fixes
- Andrea Arkangeli: VM race fix and OOM tweak.
- Arjan Van de Ven: merge RH kernel fixes
- Andi Kleen: use more readable 'likely()/unlikely()' instead of __builtin_expect()
- Keith Owens: fix 64-bit ELF types
- Gerd Knorr: mark more broken PCI bridges, update btaudio driver
- Paul Mackerras: powermac driver update
- me: clean up PTRACE_DETACH to use common infrastructure

pre11:
- Neil Brown: md cleanups/fixes
- Andrew Morton: console locking merge
- Andrea Arkangeli: major VM merge

pre10:
- Alan Cox: continued merging
- Mingming Cao: make msgrcv/shmat check the queue/segment ID's properly
- Greg KH: USB serial init failure fix, Xircom serial converter driver
- Neil Brown: nsfd/raid/md/lockd cleanups
- Ingo Molnar: multipath RAID personality, raid xor update
- Hugh Dickins/Marcelo Tosatti: swapin read-ahead race fix
- Vojtech Pavlik: fix up some of the infrastructure for x86-64
- Robert Love: AMD 761 AGP GART support
- Jens Axboe: fix SCSI-generic queue handling race
- me: be sane about page reference bits

pre9:
- Greg KH: start migration to new "min()/max()"
- Roman Zippel: move affs over to "min()/max()".
- Vojtech Pavlik: VIA update (make sure not to IRQ-unmask a vt82c576)
- Jan Kara: quota bug-fix (don't decrement quota for non-counted inode)
- Anton Altaparmakov: more NTFS updates
- Al Viro: make nosuid/noexec/nodev be per-mount flags, not per-filesystem
- Alan Cox: merge input/joystick layer differences, driver and alpha merge
- Keith Owens: scsi Makefile cleanup
- Trond Myklebust: fix oopsable race in locking code
- Jean Tourrilhes: IrDA update

pre8:
- Christoph Hellwig: clean up personality handling a bit
- Robert Love: update sysctl/vm documentation
- make the three-argument (that everybody hates) "min()" be "min_t()",
and introduce a type-anal "min()" that complains about arguments of
different types.

pre7:
- Alan Cox: big driver/mips sync
- Andries Brouwer, Christoph Hellwig: more gendisk fixups
- Tobias Ringstrom: tulip driver workaround for DC21143 erratum

pre6:
- Jens Axboe: remove trivially dead io_request_lock usage
- Andrea Arcangeli: softirq cleanup and ARM fixes. Slab cleanups
- Christoph Hellwig: gendisk handling helper functions/cleanups
- Nikita Danilov: reiserfs dead code pruning
- Anton Altaparmakov: NTFS update to 1.1.18
- firestream network driver: patch reverted on authors request
- NIIBE Yutaka: SH architecture update
- Paul Mackerras: PPC cleanups, PPC8xx update.
- me: reverse broken bootdata allocation patch that went into pre5

pre5:
- Merge with Alan
- Trond Myklebust: NFS fixes - kmap and root inode special case
- Al Viro: more superblock cleanups, inode leak in rd.c, minix
directories in page cache
- Paul Mackerras: clean up rubbish from sl82c105.c
- Neil Brown: md/raid cleanups, NFS filehandles
- Johannes Erdfelt: USB update (usb-2.0 support, visor fix, Clie fix,
pl2303 driver update)
- David Miller: sparc and net update
- Eric Biederman: simplify and correct bootdata allocation - don't
overwrite ramdisks
- Tim Waugh: support multiple SuperIO devices, parport doc updates

pre4:
- Hugh Dickins: swapoff cleanups and speedups
- Matthew Dharm: USB storage update
- Keith Owens: Makefile fixes
- Tom Rini: MPC8xx build fix
- Nikita Danilov: reiserfs update
- Jakub Jelinek: ELF loader fix for ET_DYN
- Andrew Morton: reparent_to_init() for kernel threads
- Christoph Hellwig: VxFS and SysV updates, vfs_permission fix

pre3:
- Johannes Erdfelt, Oliver Neukum: USB printer driver race fix
- John Byrne: fix stupid i386-SMP irq stack layout bug
- Andreas Bombe, me: yenta IO window fix
- Neil Brown: raid1 buffer state fix
- David Miller, Paul Mackerras: fix up sparc and ppc respectively for kmap/kbd_rate
- Matija Nalis: umsdos fixes, and make it possible to boot up with umsdos
- Francois Romieu: fix bugs in dscc4 driver
- Andy Grover: new PCI config space access functions (eventually for ACPI)
- Albert Cranford: fix incorrect e2fsprog data from ver_linux script
- Dave Jones: re-sync x86 setup code, fix macsonic kmalloc use
- Johannes Erdfelt: remove obsolete plusb USB driver
- Andries Brouwer: fix USB compact flash version info, add blksize ioctls

pre2:
- Al Viro: block device cleanups
- Marcelo Tosatti: make bounce buffer allocations more robust (it's ok
for them to do IO, just not cause recursive bounce IO. So allow them)
- Anton Altaparmakov: NTFS update (1.1.17)
- Paul Mackerras: PPC update (big re-org)
- Petko Manolov: USB pegasus driver fixes
- David Miller: networking and sparc updates
- Trond Myklebust: Export atomic_dec_and_lock
- OGAWA Hirofumi: find and fix umsdos "filldir" users that were broken
by the 64-bit-cleanups. Fix msdos warnings.
- Al Viro: superblock handling cleanups and race fixes
- Johannes Erdfelt++: USB updates

pre1:
- Jeff Hartmann: DRM AGP/alpha cleanups
- Ben LaHaise: highmem user pagecopy/clear optimization
- Vojtech Pavlik: VIA IDE driver update
- Herbert Xu: make cramfs work with HIGHMEM pages
- David Fennell: awe32 ram size detection improvement
- Istvan Varadi: umsdos EMD filename bug fix
- Keith Owens: make min/max work for pointers too
- Jan Kara: quota initialization fix
- Brad Hards: Kaweth USB driver update (enable, and fix endianness)
- Ralf Baechle: MIPS updates
- David Gibson: airport driver update
- Rogier Wolff: firestream ATM driver multi-phy support
- Daniel Phillips: swap read page referenced set - avoid swap thrashing

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:03    [W:0.039 / U:0.292 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site