From: Linus Torvalds <torvalds@transmeta.com>
To: Steve Bergman <steve@netplus.net>
Cc: Andrea Arcangeli <andrea@e-mind.com>,
Benjamin Redelings I <bredelin@ucsd.edu>,
"Stephen C. Tweedie" <sct@redhat.com>,
linux-kernel@vger.rutgers.edu,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Rik van Riel <H.H.vanRiel@phys.uu.nl>,
linux-mm@kvack.org
Subject: Re: [patch] new-vm improvement [Re: 2.2.0 Bug summary]
Date: Fri, 1 Jan 1999 22:55:09 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.3.95.990101225111.16066K-100000@penguin.transmeta.com> (raw)
In-Reply-To: <368D5E52.FE8B7B8@netplus.net>
On Fri, 1 Jan 1999, Steve Bergman wrote:
>
> I got the patch and I must say I'm impressed. I ran my "117 image" test
> and got these results:
>
> 2.1.131-ac11 172 sec (This was previously the best)
> 2.2.0-pre1 + Arcangeli's 1st patch 400 sec
> test1-pre + Arcangeli's 2nd patch 119 sec (!)
Would you care to do some more testing? In particular, I'd like to hear
how basic 2.2.0pre3 works (that's essentially the same as test1-pre, with
only minor updates)? I'd like to calibrate the numbers against that,
rather than against kernels that I haven't actually ever run myself.
The other thing I'd like to hear is how pre3 looks with this patch, which
should behave basically like Andrea's latest patch but without the
obfuscation he put into his patch..
Linus
-----
diff -u --recursive --new-file v2.2.0-pre3/linux/Makefile linux/Makefile
--- v2.2.0-pre3/linux/Makefile Fri Jan 1 12:58:14 1999
+++ linux/Makefile Fri Jan 1 12:58:29 1999
@@ -1,7 +1,7 @@
VERSION = 2
PATCHLEVEL = 2
SUBLEVEL = 0
-EXTRAVERSION =-pre3
+EXTRAVERSION =-pre4
ARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ -e s/arm.*/arm/ -e s/sa110/arm/)
diff -u --recursive --new-file v2.2.0-pre3/linux/drivers/misc/parport_procfs.c linux/drivers/misc/parport_procfs.c
--- v2.2.0-pre3/linux/drivers/misc/parport_procfs.c Sun Nov 8 14:02:59 1998
+++ linux/drivers/misc/parport_procfs.c Fri Jan 1 21:27:12 1999
@@ -305,12 +305,11 @@
{
base = new_proc_entry("parport", S_IFDIR, &proc_root,PROC_PARPORT,
NULL);
- base->fill_inode = &parport_modcount;
-
if (base == NULL) {
printk(KERN_ERR "Unable to initialise /proc/parport.\n");
return 0;
}
+ base->fill_inode = &parport_modcount;
return 1;
}
diff -u --recursive --new-file v2.2.0-pre3/linux/fs/binfmt_misc.c linux/fs/binfmt_misc.c
--- v2.2.0-pre3/linux/fs/binfmt_misc.c Fri Jan 1 12:58:20 1999
+++ linux/fs/binfmt_misc.c Fri Jan 1 13:00:10 1999
@@ -30,6 +30,16 @@
#include <asm/uaccess.h>
#include <asm/spinlock.h>
+/*
+ * We should make this work with a "stub-only" /proc,
+ * which would just not be able to be configured.
+ * Right now the /proc-fs support is too black and white,
+ * though, so just remind people that this should be
+ * fixed..
+ */
+#ifndef CONFIG_PROC_FS
+#error You really need /proc support for binfmt_misc. Please reconfigure!
+#endif
#define VERBOSE_STATUS /* undef this to save 400 bytes kernel memory */
diff -u --recursive --new-file v2.2.0-pre3/linux/include/linux/swapctl.h linux/include/linux/swapctl.h
--- v2.2.0-pre3/linux/include/linux/swapctl.h Tue Dec 22 14:16:58 1998
+++ linux/include/linux/swapctl.h Fri Jan 1 22:31:21 1999
@@ -90,18 +90,6 @@
#define PAGE_DECLINE (swap_control.sc_page_decline)
#define PAGE_INITIAL_AGE (swap_control.sc_page_initial_age)
-/* Given a resource of N units (pages or buffers etc), we only try to
- * age and reclaim AGE_CLUSTER_FRACT per 1024 resources each time we
- * scan the resource list. */
-static inline int AGE_CLUSTER_SIZE(int resources)
-{
- unsigned int n = (resources * AGE_CLUSTER_FRACT) >> 10;
- if (n < AGE_CLUSTER_MIN)
- return AGE_CLUSTER_MIN;
- else
- return n;
-}
-
#endif /* __KERNEL */
#endif /* _LINUX_SWAPCTL_H */
diff -u --recursive --new-file v2.2.0-pre3/linux/mm/vmscan.c linux/mm/vmscan.c
--- v2.2.0-pre3/linux/mm/vmscan.c Fri Jan 1 12:58:21 1999
+++ linux/mm/vmscan.c Fri Jan 1 22:41:58 1999
@@ -363,13 +363,23 @@
/*
* We make one or two passes through the task list, indexed by
* assign = {0, 1}:
- * Pass 1: select the swappable task with maximal swap_cnt.
- * Pass 2: assign new swap_cnt values, then select as above.
+ * Pass 1: select the swappable task with maximal RSS that has
+ * not yet been swapped out.
+ * Pass 2: re-assign rss swap_cnt values, then select as above.
+ *
* With this approach, there's no need to remember the last task
* swapped out. If the swap-out fails, we clear swap_cnt so the
* task won't be selected again until all others have been tried.
+ *
+ * Think of swap_cnt as a "shadow rss" - it tells us which process
+ * we want to page out (always try largest first).
*/
- counter = ((PAGEOUT_WEIGHT * nr_tasks) >> 10) >> priority;
+ counter = nr_tasks / (priority+1);
+ if (counter < 1)
+ counter = 1;
+ if (counter > nr_tasks)
+ counter = nr_tasks;
+
for (; counter >= 0; counter--) {
assign = 0;
max_cnt = 0;
@@ -382,15 +392,9 @@
continue;
if (p->mm->rss <= 0)
continue;
- if (assign) {
- /*
- * If we didn't select a task on pass 1,
- * assign each task a new swap_cnt.
- * Normalise the number of pages swapped
- * by multiplying by (RSS / 1MB)
- */
- p->swap_cnt = AGE_CLUSTER_SIZE(p->mm->rss);
- }
+ /* Refresh swap_cnt? */
+ if (assign)
+ p->swap_cnt = p->mm->rss;
if (p->swap_cnt > max_cnt) {
max_cnt = p->swap_cnt;
pbest = p;
@@ -404,14 +408,13 @@
}
goto out;
}
- pbest->swap_cnt--;
/*
* Nonzero means we cleared out something, but only "1" means
* that we actually free'd up a page as a result.
*/
if (swap_out_process(pbest, gfp_mask) == 1)
- return 1;
+ return 1;
}
out:
return 0;
@@ -451,19 +454,17 @@
/* max one hundreth of a second */
end_time = jiffies + (HZ-1)/100;
do {
- int priority = 5;
+ int priority = 8;
int count = pager_daemon.swap_cluster;
switch (kswapd_state) {
do {
default:
free_memory(shrink_mmap(priority, 0));
+ free_memory(swap_out(priority, 0));
kswapd_state++;
case 1:
free_memory(shm_swap(priority, 0));
- kswapd_state++;
- case 2:
- free_memory(swap_out(priority, 0));
shrink_dcache_memory(priority, 0);
kswapd_state = 0;
} while (--priority >= 0);
@@ -562,7 +563,7 @@
current->flags |= PF_MEMALLOC;
- priority = 5;
+ priority = 8;
do {
free_memory(shrink_mmap(priority, gfp_mask));
free_memory(shm_swap(priority, gfp_mask));
--
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next prev parent reply other threads:[~1999-01-02 6:57 UTC|newest]
Thread overview: 243+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <199812290146.BAA12687@terrorserver.swansea.linux.org.uk>
1998-12-31 18:00 ` 2.2.0 Bug summary Andrea Arcangeli
1998-12-31 18:34 ` [patch] new-vm improvement [Re: 2.2.0 Bug summary] Andrea Arcangeli
1999-01-01 0:16 ` Steve Bergman
1999-01-01 17:16 ` Andrea Arcangeli
1999-01-01 16:44 ` Andrea Arcangeli
1999-01-01 20:02 ` Andrea Arcangeli
1999-01-01 23:46 ` Steve Bergman
1999-01-02 6:55 ` Linus Torvalds [this message]
1999-01-02 8:33 ` Steve Bergman
1999-01-02 14:48 ` Andrea Arcangeli
1999-01-02 15:38 ` Andrea Arcangeli
1999-01-02 18:10 ` Linus Torvalds
1999-01-02 20:52 ` Andrea Arcangeli
1999-01-03 2:59 ` Andrea Arcangeli
1999-01-04 18:08 ` [patch] arca-vm-6, killed kswapd [Re: [patch] new-vm improvement , [Re: 2.2.0 Bug summary]] Andrea Arcangeli
1999-01-04 20:56 ` Linus Torvalds
1999-01-04 21:10 ` Rik van Riel
1999-01-04 22:04 ` Alan Cox
1999-01-04 21:55 ` Linus Torvalds
1999-01-04 22:51 ` Andrea Arcangeli
1999-01-05 0:32 ` Andrea Arcangeli
1999-01-05 0:52 ` Zlatko Calusic
1999-01-05 3:02 ` Zlatko Calusic
1999-01-05 11:49 ` Andrea Arcangeli
1999-01-05 13:23 ` Zlatko Calusic
1999-01-05 15:42 ` Andrea Arcangeli
1999-01-05 16:16 ` Zlatko Calusic
1999-01-05 15:35 ` arca-vm-8 [Re: [patch] arca-vm-6, killed kswapd [Re: [patch] new-vm , improvement , [Re: 2.2.0 Bug summary]]] Andrea Arcangeli
1999-01-06 14:48 ` Andrea Arcangeli
1999-01-06 23:31 ` Andrea Arcangeli
1999-01-07 3:32 ` Results: 2.2.0-pre5 vs arcavm10 vs arcavm9 vs arcavm7 Steve Bergman
1999-01-07 12:02 ` Andrea Arcangeli
1999-01-07 20:27 ` Linus Torvalds
1999-01-07 23:56 ` Andrea Arcangeli
1999-01-07 17:35 ` Linus Torvalds
1999-01-07 18:44 ` Zlatko Calusic
1999-01-07 19:33 ` Linus Torvalds
1999-01-07 21:10 ` Zlatko Calusic
1999-01-07 19:38 ` Zlatko Calusic
1999-01-07 19:40 ` Andrea Arcangeli
1999-01-09 6:28 ` 2.2.0-pre[56] swap performance poor with > 1 thrashing task Dax Kelson
1999-01-09 6:32 ` Zlatko Calusic
1999-01-09 6:44 ` Linus Torvalds
1999-01-09 18:58 ` Andrea Arcangeli
1999-01-11 9:21 ` Buffer handling (setting PG_referenced on access) Zlatko Calusic
1999-01-11 17:44 ` Linus Torvalds
1999-01-11 20:14 ` Zlatko Calusic
1999-01-16 17:35 ` 2.2.0-pre[56] swap performance poor with > 1 thrashing task Andrea Arcangeli
1999-01-09 7:48 ` Benjamin Redelings I
1999-01-09 6:53 ` Linus Torvalds
1999-01-09 22:39 ` Results: pre6 vs pre6+zlatko's_patch vs pre5 vs arcavm13 Steve Bergman
1999-01-10 0:28 ` Steve Bergman
1999-01-10 5:35 ` Linus Torvalds
1999-01-10 18:33 ` Andrea Arcangeli
1999-01-10 18:43 ` Steve Bergman
1999-01-10 19:08 ` Linus Torvalds
1999-01-10 19:23 ` Vladimir Dergachev
1999-01-10 20:09 ` Andrea Arcangeli
1999-01-10 20:29 ` Steve Bergman
1999-01-10 21:41 ` Linus Torvalds
1999-01-10 23:33 ` testing/pre-7 and do_poll() Chip Salzenberg
1999-01-11 6:02 ` Linus Torvalds
1999-01-11 6:26 ` Chip Salzenberg
1999-01-11 6:46 ` Linus Torvalds
1999-01-11 6:59 ` Chip Salzenberg
1999-01-11 7:02 ` Linus Torvalds
1999-01-11 22:08 ` Shawn Leas
1999-01-11 22:13 ` Linus Torvalds
1999-01-12 0:25 ` estafford
1999-01-12 8:25 ` Shawn Leas
1999-01-12 7:06 ` Gregory Maxwell
1999-01-11 20:20 ` Adam Heath
1999-01-11 16:57 ` Results: pre6 vs pre6+zlatko's_patch vs pre5 vs arcavm13 Steve Bergman
1999-01-11 19:36 ` Andrea Arcangeli
1999-01-11 23:03 ` Andrea Arcangeli
1999-01-11 23:38 ` Zlatko Calusic
1999-01-12 2:02 ` Steve Bergman
1999-01-12 3:21 ` Results: Zlatko's new vm patch Steve Bergman
1999-01-12 5:33 ` Linus Torvalds
1999-01-12 14:49 ` Andrea Arcangeli
1999-01-12 16:58 ` Joseph Anthony
1999-01-12 18:16 ` Stephen C. Tweedie
1999-01-12 20:15 ` Michael K Vance
1999-01-13 19:25 ` Stephen C. Tweedie
1999-01-12 18:24 ` Michael K Vance
1999-01-13 0:01 ` Where to find pre7. Was: " Robert Thorncrantz
1999-01-13 20:47 ` [patch] arca-vm-19 [Re: Results: Zlatko's new vm patch] Andrea Arcangeli
1999-01-14 12:30 ` Andrea Arcangeli
1999-01-15 23:56 ` [patch] NEW: arca-vm-21, swapout via shrink_mmap using PG_dirty Andrea Arcangeli
1999-01-16 16:49 ` Andrea Arcangeli
1999-01-17 23:47 ` Andrea Arcangeli
1999-01-18 5:11 ` Linus Torvalds
1999-01-18 7:28 ` Eric W. Biederman
1999-01-18 10:00 ` Andrea Arcangeli
1999-01-18 9:15 ` Andrea Arcangeli
1999-01-18 17:49 ` Linus Torvalds
1999-01-18 19:22 ` Andrea Arcangeli
1999-01-10 20:40 ` Results: pre6 vs pre6+zlatko's_patch vs pre5 vs arcavm13 Andrea Arcangeli
1999-01-10 20:50 ` Linus Torvalds
1999-01-10 21:01 ` Andrea Arcangeli
1999-01-10 21:51 ` Steve Bergman
1999-01-10 22:50 ` Results: arcavm15, et. al Steve Bergman
1999-01-11 0:20 ` Steve Bergman
1999-01-11 13:21 ` Andrea Arcangeli
1999-01-11 3:47 ` Results: pre6 vs pre6+zlatko's_patch vs pre5 vs arcavm13 Gregory Maxwell
1999-01-06 23:35 ` arca-vm-8 [Re: [patch] arca-vm-6, killed kswapd [Re: [patch] new-vm , improvement , [Re: 2.2.0 Bug summary]]] Linus Torvalds
1999-01-07 4:30 ` Eric W. Biederman
1999-01-07 17:56 ` Linus Torvalds
1999-01-07 18:18 ` Rik van Riel
1999-01-07 19:19 ` arca-vm-8 [Re: [patch] arca-vm-6, killed kswapd [Re: [patch] Alan Cox
1999-01-07 18:55 ` arca-vm-8 [Re: [patch] arca-vm-6, killed kswapd [Re: [patch] new-vm , improvement , [Re: 2.2.0 Bug summary]]] Zlatko Calusic
1999-01-07 22:57 ` Linus Torvalds
1999-01-08 1:16 ` Linus Torvalds
1999-01-08 10:45 ` Andrea Arcangeli
1999-01-08 19:06 ` Linus Torvalds
1999-01-09 9:43 ` MM deadlock [was: Re: arca-vm-8...] Savochkin Andrey Vladimirovich
1999-01-09 18:00 ` Linus Torvalds
1999-01-09 18:41 ` Andrea Arcangeli
1999-01-10 21:41 ` Stephen C. Tweedie
1999-01-10 21:47 ` Linus Torvalds
1999-01-09 21:50 ` Linus Torvalds
1999-01-10 11:56 ` Savochkin Andrey Vladimirovich
1999-01-10 17:59 ` Andrea Arcangeli
1999-01-10 22:33 ` Stephen C. Tweedie
1999-01-10 16:59 ` Stephen C. Tweedie
1999-01-10 18:13 ` Andrea Arcangeli
1999-01-10 18:35 ` Linus Torvalds
1999-01-10 19:45 ` Alan Cox
1999-01-10 19:03 ` Andrea Arcangeli
1999-01-10 21:39 ` Stephen C. Tweedie
1999-01-10 19:09 ` Linus Torvalds
1999-01-10 20:33 ` Alan Cox
1999-01-10 20:07 ` Linus Torvalds
1999-01-10 22:18 ` Stephen C. Tweedie
1999-01-10 22:49 ` Stephen C. Tweedie
1999-01-11 6:04 ` Eric W. Biederman
1999-01-12 16:06 ` Stephen C. Tweedie
1999-01-12 17:54 ` Linus Torvalds
1999-01-12 18:44 ` Zlatko Calusic
1999-01-12 19:05 ` Andrea Arcangeli
1999-01-13 17:48 ` Stephen C. Tweedie
1999-01-13 18:07 ` 2.2.0-pre6 ain't nice =( Kalle Andersson
1999-01-13 19:05 ` MM deadlock [was: Re: arca-vm-8...] Alan Cox
1999-01-13 19:23 ` MOLNAR Ingo
1999-01-13 19:26 ` Andrea Arcangeli
1999-01-14 11:02 ` Mike Jagdis
1999-01-14 22:38 ` Andrea Arcangeli
1999-01-15 7:40 ` Agus Budy Wuysang
1999-01-14 10:48 ` Mike Jagdis
1999-01-12 21:46 ` Rik van Riel
1999-01-13 6:52 ` Zlatko Calusic
1999-01-13 13:45 ` Andrea Arcangeli
1999-01-13 13:58 ` Chris Evans
1999-01-13 15:07 ` Andrea Arcangeli
1999-01-13 22:11 ` Stephen C. Tweedie
1999-01-13 14:59 ` Rik van Riel
1999-01-13 18:10 ` Andrea Arcangeli
1999-01-13 22:14 ` Stephen C. Tweedie
1999-01-14 14:53 ` Dr. Werner Fink
1999-01-21 16:50 ` Stephen C. Tweedie
1999-01-21 19:53 ` Andrea Arcangeli
1999-01-22 13:55 ` Stephen C. Tweedie
1999-01-22 19:45 ` Andrea Arcangeli
1999-01-23 23:20 ` Alan Cox
1999-01-24 0:19 ` Linus Torvalds
1999-01-24 18:33 ` Gregory Maxwell
1999-01-25 0:21 ` Linus Torvalds
1999-01-25 1:28 ` Alan Cox
1999-01-25 3:35 ` pmonta
1999-01-25 4:17 ` Linus Torvalds
1999-01-24 20:33 ` Alan Cox
1999-01-25 0:27 ` Linus Torvalds
1999-01-25 1:38 ` Alan Cox
1999-01-25 1:04 ` Andrea Arcangeli
1999-01-25 2:10 ` Alan Cox
1999-01-25 3:16 ` Garst R. Reese
1999-01-25 10:49 ` Alan Cox
1999-01-25 14:06 ` Rik van Riel
1999-01-25 21:59 ` Gerard Roudier
1999-01-26 11:45 ` Thomas Sailer
1999-01-26 20:48 ` Gerard Roudier
1999-01-26 21:24 ` Thomas Sailer
1999-01-27 0:25 ` David Lang
1999-01-27 16:05 ` Stephen C. Tweedie
1999-01-27 20:11 ` Gerard Roudier
1999-01-26 13:06 ` Stephen C. Tweedie
1999-01-26 14:28 ` Alan Cox
1999-01-26 14:15 ` MOLNAR Ingo
1999-01-26 14:36 ` yodaiken
1999-01-26 15:21 ` MOLNAR Ingo
1999-01-27 10:31 ` yodaiken
1999-01-26 15:46 ` Alan Cox
1999-01-26 16:45 ` Stephen C. Tweedie
1999-01-30 7:01 ` yodaiken
1999-02-01 13:07 ` Stephen C. Tweedie
1999-01-26 16:37 ` Stephen C. Tweedie
1999-01-27 11:35 ` Jakub Jelinek
1999-01-26 14:21 ` Rik van Riel
1999-01-25 16:25 ` Stephen C. Tweedie
1999-01-25 16:52 ` Andrea Arcangeli
1999-01-25 18:27 ` Linus Torvalds
1999-01-25 18:43 ` Stephen C. Tweedie
1999-01-25 18:49 ` Linus Torvalds
1999-01-25 18:43 ` Linus Torvalds
1999-01-25 19:15 ` Stephen C. Tweedie
1999-01-26 1:57 ` Andrea Arcangeli
1999-01-26 18:37 ` Andrea Arcangeli
1999-01-27 12:13 ` Stephen C. Tweedie
1999-01-22 16:29 ` Eric W. Biederman
1999-01-25 13:14 ` Dr. Werner Fink
1999-01-25 17:56 ` Stephen C. Tweedie
1999-01-25 19:10 ` Andrea Arcangeli
1999-01-25 20:49 ` Dr. Werner Fink
1999-01-25 20:56 ` Linus Torvalds
1999-01-26 12:23 ` Rik van Riel
1999-01-26 15:44 ` Andrea Arcangeli
1999-01-27 14:52 ` Stephen C. Tweedie
1999-01-28 19:12 ` Dr. Werner Fink
1999-01-13 17:55 ` [PATCH] " Stephen C. Tweedie
1999-01-13 18:52 ` Andrea Arcangeli
1999-01-13 22:10 ` Stephen C. Tweedie
1999-01-13 22:30 ` Linus Torvalds
1999-01-11 11:20 ` Pavel Machek
1999-01-11 17:35 ` Stephen C. Tweedie
1999-01-11 14:11 ` Savochkin Andrey Vladimirovich
1999-01-11 17:55 ` Linus Torvalds
1999-01-11 18:37 ` Andrea Arcangeli
1999-01-08 2:56 ` arca-vm-8 [Re: [patch] arca-vm-6, killed kswapd [Re: [patch] new-vm , improvement , [Re: 2.2.0 Bug summary]]] Eric W. Biederman
1999-01-09 0:50 ` David S. Miller
1999-01-09 2:13 ` Stephen C. Tweedie
1999-01-09 2:34 ` Andrea Arcangeli
1999-01-09 9:30 ` Stephen C. Tweedie
1999-01-09 12:11 ` Andrea Arcangeli
1999-01-07 14:11 ` Andrea Arcangeli
1999-01-07 18:19 ` Linus Torvalds
1999-01-07 20:35 ` Andrea Arcangeli
1999-01-07 23:51 ` Linus Torvalds
1999-01-08 0:04 ` Andrea Arcangeli
1999-01-04 22:43 ` [patch] arca-vm-6, killed kswapd [Re: [patch] new-vm improvement , [Re: 2.2.0 Bug summary]] Andrea Arcangeli
1999-01-04 22:29 ` Andrea Arcangeli
1999-01-05 13:33 ` [patch] new-vm improvement [Re: 2.2.0 Bug summary] Ben McCann
1999-01-02 20:04 ` Steve Bergman
1999-01-02 3:03 ` Andrea Arcangeli
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