Kernel

VM performance issue in KVM guests.
(copying lkml and some scheduler folk) On 04/10/2010 11:16 AM, Zhang, Xiantao wrote: Hi, all We are working on the scalability work for KVM guests, and found one big issue exists in linux scheduler and it may impact guest's performance and scalability a lot for some special workloads running in VM. In the ... 18 Apr 2010 21:56

Google Summer of Code 2010 - Please ASSIGN (not propose) mentors to the students
Hi, on Tuesday morning the distribution of the student slots to the mentoring organizations will take place. The number of slots which each organization gets depends mainly on how many student applications with assigned mentor (not only proposed mentors) they have. So please ASSIGN a mentor to each good app... 10 Apr 2010 15:42

[PATCHv2] MTD: Suppress warnings in inline_map_read()
With gcc 4.4.3 -O2 on MIPS32: drivers/mtd/chips/cfi_util.c: In function 'cfi_qry_present': include/linux/mtd/map.h:390: warning: 'r' may be used uninitialized in this function include/linux/mtd/map.h:375: note: 'r' was declared here include/linux/mtd/map.h:390: warning: 'r' may be used uninitialized in this funct... 10 Apr 2010 15:42

random: Forbid llseek on random chardev
On Sat, 2010-04-10 at 16:17 +0200, Frederic Weisbecker wrote: From: Arnd Bergmann <arnd(a)arndb.de> Seeking on /dev/random and /dev/urandom is pointless. It is indeed pointless, though that doesn't mean no one does it. Forbidding a no-op seems a rather unfriendly way to fix this. Using generic_file_ll... 10 Apr 2010 14:36

[PATCH] dm: Use nonseekable_open
From: Arnd Bergmann <arnd(a)relay.de.ibm.com> The dm control device does not implement read/write, so it has no use for seeking. Using no_llseek prevents falling back to default_llseek, which requires the BKL. Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> Cc: Alasdair G Kergon <agk(a)redhat.com> [drop useless llse... 10 Apr 2010 11:17

[PATCH] x86/microcode: Use nonseekable_open
From: Arnd Bergmann <arnd(a)relay.de.ibm.com> No need to seek on this file, so prevent it outright so we can avoid using default_llseek. Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> Cc: Ingo Molnar <mingo(a)elte.hu> Cc: H. Peter Anvin <hpa(a)zytor.com> Cc: Thomas Gleixner <tglx(a)linutronix.de> [drop useless llseek ... 10 Apr 2010 11:17

[PATCH] random: Forbid llseek on random chardev
From: Arnd Bergmann <arnd(a)arndb.de> Seeking on /dev/random and /dev/urandom is pointless. Using generic_file_llseek means we no longer need to take the BKL if anyone tries to seek on these. Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> Cc: Matt Mackall <mpm(a)selenic.com> Cc: Andrew Morton <akpm(a)linux-foundation... 10 Apr 2010 11:17

Kill the bkl in procfs
On Tue, Mar 30, 2010 at 08:20:09AM +0200, Frederic Weisbecker wrote: Hi, This patchset drops any use of the big kernel lock from procfs. May be there is still one or two NULL llseek somewhere but I think we have fixed 99% of those that were in the procfs core. Users of procfs implementing an ioct... 10 Apr 2010 10:11

2.6.34-rc3: eth0 (8139too): transmit queue 0 timed out
Hi, I tried the Linux kernel 2.6.34-rc3 on my laptop. The network connection is not working with this kernel version, but works for example with 2.6.32. I used the attaced .config to compile the kernel. Here is the full dmesg: [ 0.000000] Linux version 2.6.34-rc3 (nmarci(a)europa) (gcc version 4.4.3 2010010... 10 Apr 2010 09:06

Linux 2.6.34-rc3 + CAN build problem
Hi, I have some problem building Liunux kernel 2.6.34-rc3 with the attached .config: $ make clean bzImage modules [...] CC net/socket.o LD net/802/built-in.o LD net/can/built-in.o CC [M] net/can/bcm.o CC [M] net/can/raw.o In file included from /mnt/store/nmarci/src/linux-2.6.34-r... 13 Apr 2010 06:11