Date: Sun, 31 Oct 1999 17:05:17 +0100 (CET)
From: Andrea Arcangeli <<a href="mailto:andrea@suse.de">andrea@suse.de>
To: linux-kernel@vger.rutgers.edu
I released a 2.2.13aa3 mainly to fix an interesting bigmem bug spotted and
fixed by Leonard N. Zubkoff. His fix is obviously right and strictly
necessary. Unfortunately such bug can trigger only on real bigmem hardware
and as I don't have access to a real bigmem hardware I couldn't reproduce
and debug it here. I'll take care to fix such bigmem bug in the
2.3.25pre2 kernel as well ASAP (I verifyed the bug is present into the 2.3
bigmem stuff as well).
Many thanks Leonard!! ;))
This bugfix release is interesting for you _only_ if one of the below
conditions is true:
o you are using the bigmem code and you have more than 2gigabyte of
RAM and you have CONFIG_2G set
o you are using the bigmem code and you have more than 1gigabyte of
RAM and you have CONFIG_1G set
o you are taking advantage of the fdset patch to increase the fdset
to more than 1024 files descriptors
The differences between 2.2.13aa2 and 2.2.13aa3 are:
z-bigmem-2.2.13aa3-7.gz -> fixed a obvious silly bigmem
bug that will lead
to processes killed randomly.
(all the credit goes to Leonard N.
Zubkoff)
fdset-fix.gz -> fixed a fdset bug that may lead to
memory corruption and Oopses
(credits goes to
Savochkin Andrey Vladimirovich,
I only backported the 2.3.x patch
to a four liner against 2.3.13)
dcache-hashfn.gz -> use only the dentry noise for
randomizing the dcache hashfn
(all the credit goes to David S.
Miller)
To go in sync with 2.2.13aa3 you can:
mkdir 2.2.13aa3
cd 2.2.13aa3
wget --retr-symlinks -A*.gz ftp://ftp.us.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.2/2.2.13aa3/*
cd ..
and now you'll have all the interesting patches in the directory
2.2.13aa3.
At this point rename the 2.2.13 sources to 2.2.13aa3:
mv linux-2.2.13 linux-2.2.13aa3
cd linux-2.2.13aa3
and apply all the 2.2.13aa3 patches that you previously downloaded from
the ftp site:
apply-patches.sh ../2.2.13aa3
At this point your tree will be in sync with 2.2.13aa3. Just configure
recompile and boot the new kernel.
You can find the `apply-patches.sh` bash script I written to easily apply
my kernel patches here:
ftp://ftp.*.kernel.org/pub/linux/kernel/people/andrea/tools/apply-patches/apply-patches.sh.gz
There is also a README on how to use it:
ftp://ftp.*.kernel.org/pub/linux/kernel/people/andrea/tools/apply-patches/README.gz
The 2.2.13aa3 kernel is placed here:
ftp://ftp.*.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.2/2.2.13aa3/
Have fun!
------ stuff present since 2.2.13aa2 --------
SMP-scheduler-2.2.11-E.gz -> rewrote of reschedule_idle. (me)
buffer-hash.gz -> fixes lowmem box hash size. (me)
buffer-races-2.2.10-A.gz -> fixes of race condition that may lead
to bad things in invalidate_buffers()
and set_blocksize(). (me)
clear-backlog-2.gz -> fixes for a SMP race condition in
the main network backlog handling. (me)
dcache-hash.gz -> dcache hash dynamic (with my
own heuristc). (started from 2.2.13ac1
but then reimplemented by me)
free_page.gz -> cleanup of the __free_pages
interface. (me)
hashed-buffers-2.2.10.gz -> minor fix to increase the debugging
information in the right place. (me)
inode-leak-2.2.10-A.gz -> make sure to not leak memory
by allocating lots of sockets (DoS),
and let know the admin to enlarge
the max-inodes if the admin really
wants more unfreeable memory in the
icache. (me)
kupdate-sigstop-2.2.11-1.gz -> allow kupdate to be stopped via
SIGSTOP (currently it must be stopped
by setting interval to zero via
sysctl). (me)
no-swapout-2.2.10-B.gz -> avoid swapin/swapouts during heavy
I/O (strictly necessary for decent
performances on very I/O and MM loaded
servers). (me)
oom-2.2.12-I.gz -> assorted OOM fixes (deadlocks in
pagein, Alpha SIGBUS fix, avoid
sigkilling iopl() application send
a sigterm instead, avoid init
to be killed), it's the same
patch merged by Alan into 2.2.14pre2. (me)
pagecache-hash.gz -> pagecache hash dynamic (I think
it's DaveM's work, literally I took it
from 2.2.13ac1). I agree with the
heuristc used. It allocates
num_physpages buckets for the pagecache
and this basically means all the
buckets will be filled supposing a
perfect hash distribution with all the memory
allocated in the cache. (all credits
to David S. Miller)
probe-irq-2.3.14-pre2-1.gz -> avoid a pending irq to be mistaken
for a spurious irq. (me)
shrink_all_cache-2.2.10-A.gz -> make sure that big memory boxes will
shrink the cache well enough. (me)
trashing-mem-2.2.10-A.gz -> heuristic to penalize memory hogs,
the system will remains responsive
also during heavy swapout. (me)
version.gz -> set the EXTRAVERSION to aa2 ;)
wait-event-smp-races.gz -> Put the two mb() after setting the
task state as blocking and before
checking if the event is just happend
(SMP race fix). (me)
wait4-smp-race.gz -> _Critical_ SMP race fix.
Without this one liner each time you
run `ls` from bash, the bash is going
to deadlock in wait4 if you are unlucky
enough. The race is very small
but there are machine under heavy
fork load load that reproduced this
race regularly after some day of load.
The SMP race can happen only
with an SMP kernel on a SMP hardware. (me)
wakeup_bdflush-2.2.10-A.gz -> avoid deadlocking in wakeup_bdflush
(the run_task_queue() can sleep for
example while running the loop
request function). (me)
z-bigmem-2.2.13aa2-6.gz -> 4GB support on x86. (me and
Gerhard Wichert)
z-bigmem-nodebug.gz -> turn the bigmem code into production
mode.
z-bigmem-rawio-2.2.13aa2-1.gz -> rawio working even with bigmem memory
(I started with rawio from 2.2.13ac1
and SCT's 2.3.x rawio bounce buffers,
all the credits go to Stephen C.
Tweedie)
zmagic-all-blocksize.gz -> allow zmagic binaries to run
also on 4k filesystems (it's the same
that gone into 2.2.14pre2). (me)
------ stuff present since 2.2.13aa2 --------
Andrea
