[lkml]   [2004]   [Nov]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Subject[patch] Real-Time Preemption, -RT-2.6.10-rc2-mm1-V0.7.28-0

i have released the -V0.7.28-0 Real-Time Preemption patch, which can be
downloaded from the usual place:

this is a fixes & latency-reduction release.

Changes since a -V0.7.27-3:

- made the UP-ioapic code a bit more conservative again - maybe some of
the lockups are related?

- removed the BKL from the sound code in a cleaner way and
removed the quite fragile 'negative ->lock_depth' code. Much less
intrusive than i originally thought, and much cleaner as well.

- more fixes to the wakeup-timing logic, 4 false positives fixed in
total, mostly related to new-task-wakeup not accurately starting the

- fixed the mmx-memcpy related latency reported by Florian Schmidt and
others. Also turned off the MMX/SSE ops in the RAID code, which
can introduce similar latencies.

- kgdb fix from Bill Huey

- knfsd shutdown with-BKL-held fix

- highmem compilation fix

- profiling related crash fix

- implemented 'direct-path' rescheduling to further reduce scheduling
latency: the kernel will now in most cases go from try_to_wakeup()
into the scheduler directly without re-enabling interrupts ever again
(and thus not giving irq handlers a window to increase latency). This
is also the final fix for irq nesting and irq-stack recursion.

- turn off sync wakeups on PREEMPT_RT -> they are latency generators

to create a -V0.7.28-0 tree from scratch, the patching order is:

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 14:08    [W:0.532 / U:13.308 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site