Kernel

[PATCH 1/4] timer: Added usleep_range timer
usleep_range is a finer precision implementations of msleep and is designed to be a drop-in replacement for udelay where a precise sleep / busy-wait is unnecessary. Since an easy interface to hrtimers could lead to an undesired proliferation of interrupts, we provide only a "range" API, forcing the caller to thi... 2 Aug 2010 19:09

[PATCH 2/4] Documentation: Add timers/timers-howto.txt
This file seeks to explain the nuances in various delays; many driver writers are not necessarily familiar with the various kernel timers, their shortfalls, and quirks. When faced with ndelay, udelay, mdelay, usleep_range, msleep, and msleep_interrubtible the question "How do I just wait 1 ms for my hardware t... 2 Aug 2010 19:09

[PATCH v3 0/4] Add usleep_range
Changes from v2: * Remove usleep API It seemed the weak consensus that the best way to force callers to consider the cost / implications of the underlying hrtimers was to leave only the range API as an option. Given the dangers of an implicit slack coupled with the potential proliferation of inter... 2 Aug 2010 19:09

bio, fs: update READA and SWRITE to match the corresponding BIO_RW_* bits
On Mon, 02 Aug 2010 16:15:38 +0200 Tejun Heo <tj(a)kernel.org> wrote: Commit a82afdf (block: use the same failfast bits for bio and request) moved BIO_RW_* bits around such that they match up with REQ_* bits. Unfortunately, fs.h hard coded READ, WRITE, READA and SWRITE as 0, 1, 2 and 3, and expected them t... 6 Aug 2010 02:49

mount notification question
Hi all, is there a way to be notified when a mount occurs on the system ? Thanks -- Daniel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the ... 6 Aug 2010 04:59

unexpected high load since 2.6.35
Hi Guys, I've updated from linux 2.6.34.1 to 2.6.35. With 2.6.34.1 and before I had on my box a load average of about 0.4 to 0.5. Now with the same processes / hardware I have got between 1.2 and 1.3. In top I can see nothing is going on - CPU is still about 70% idle. I am using vmware server 1.0.10 on it, the... 2 Aug 2010 18:04

[PATCH]hostap:hostap_hw.c Fix typo.
The patch below fixes a typo in a comment. Signed-off-by: Justin P. Mattock <justinmattock(a)gmail.com> --- drivers/net/wireless/hostap/hostap_hw.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/net/wireless/hostap/hostap_hw.c b/drivers/net/wireless/hostap/hostap_hw.c index ... 2 Aug 2010 18:03

CRED: Fix __task_cred()'s lockdep check and banner comment
On Thu, Jul 29, 2010 at 12:45:55PM +0100, David Howells wrote: Fix __task_cred()'s lockdep check by removing the following validation condition: lockdep_tasklist_lock_is_held() as commit_creds() does not take the tasklist_lock, and nor do most of the functions that call it, so this check is poin... 5 Aug 2010 18:02

SATA / AHCI: Do not play with the link PM during suspend to RAM (was: Re: HDD not suspending properly / dead on resume)
On Wednesday 28 July 2010, 23:50:09 Rafael J. Wysocki wrote: On Saturday, July 10, 2010, Tejun Heo wrote: On 07/10/2010 08:50 AM, Stephan Diestelhorst wrote: I have a box where this problem is kind of reproducible, but it happens _very_ rarely. Also I can't reproduce it on demand running suspen... 3 Aug 2010 18:03

Using unsigned int for loop counters - better performance for Architectures - urban hacker legend?
Doug, I'm adding your response to lkml as its the best answer I've gotten so far. On Mon, Aug 02, 2010 at 01:10:01PM -0700, Doug Dahlby wrote: Luis, Just out of curiousity, I looked at what gcc does on my own x86 computer. When compiled regularly, the loop bodies are practically identical: $ more... 3 Aug 2010 07:03