On Wed, 2011-06-22 at 21:25 +0000, linux-audio-user-request@xxxxxxxxxxxxxxxxxxxx wrote: > Message: 16 > Date: Wed, 22 Jun 2011 17:54:40 +0100 > From: Rui Nuno Capela > Subject: Re: Kernel 2.6.39 > To: linux-audio-user@xxxxxxxxxxxxxxxxxxxx > Message-ID: <4E021E50.80209@xxxxxxxxx> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > if you're about to (aka. -rt) kernel the best > you can, with increased reliability on SCHED_FF scheduling (aka. > realtime scheduling, which is "bread & butter" for the whole jack > ecosystem) and provided you turn on the forced irq threads kernel > boot > option (threadirqs) then PREEMPT is certainly the one to configure > your > custom kernel. > > beware, VOLUNTARY_PREEMPT (intended for general purpose desktops?) > and > PREEMPT_NONE (certainly only for servers?) will just give you lousy, > xrun-prone system, with no resemblance whatsoever with a good old but > true -rt kernel ;) Hi Rui :) I used the config from the self-build kernel 2.6.33.9-rt31 and run oldconfig only to configure 2.6.39. I didn't make music until now using this kernel. Yes, I wish to "emulate" the PREEMPT_RT, since common PREEMPT only kernels never did, what I needed. What do I need to set? $ cat config-2.6.39.1 | grep PREEMPT CONFIG_TREE_PREEMPT_RCU=y CONFIG_PREEMPT_RCU=y CONFIG_PREEMPT_NOTIFIERS=y # CONFIG_PREEMPT_NONE is not set # CONFIG_PREEMPT_VOLUNTARY is not set CONFIG_PREEMPT=y IIUC this is correct?! Cheers! Ralf PS: SCHED_FF? $ cat config-2.6.39.1 | grep SCHED CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y # CONFIG_CGROUP_SCHED is not set # CONFIG_SCHED_AUTOGROUP is not set CONFIG_IOSCHED_NOOP=y CONFIG_IOSCHED_DEADLINE=y CONFIG_IOSCHED_CFQ=y CONFIG_CFQ_GROUP_IOSCHED=y CONFIG_DEFAULT_IOSCHED="cfq" CONFIG_SCHED_OMIT_FRAME_POINTER=y CONFIG_SCHED_SMT=y CONFIG_SCHED_MC=y CONFIG_SCHED_HRTICK=y CONFIG_NET_SCHED=y CONFIG_USB_EHCI_TT_NEWSCHED=y $ cat config-2.6.39.1 | grep FF CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y CONFIG_CDROM_PKTCDVD_BUFFERS=8 CONFIG_BLK_DEV_IDEDMA_SFF=y # CONFIG_BLK_DEV_OFFBOARD is not set # Controllers with non-SFF native interface CONFIG_ATA_SFF=y # SFF controllers with custom DMA interface # SATA SFF controllers with BMDMA # PATA SFF controllers with BMDMA # PIO-only SFF controllers CONFIG_INPUT_FF_MEMLESS=m CONFIG_JOYSTICK_XPAD_FF=y CONFIG_IPMI_POWEROFF=m # CONFIG_SPI_TOPCLIFF_PCH is not set CONFIG_FRAMEBUFFER_CONSOLE=y CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y CONFIG_FRAMEBUFFER_CONSOLE_ROTATION=y CONFIG_DRAGONRISE_FF=y # CONFIG_HID_EMS_FF is not set CONFIG_LOGITECH_FF=y CONFIG_LOGIRUMBLEPAD2_FF=y # CONFIG_LOGIG940_FF is not set # CONFIG_LOGIWII_FF is not set CONFIG_PANTHERLORD_FF=y CONFIG_GREENASIA_FF=y CONFIG_SMARTJOYPLUS_FF=y CONFIG_THRUSTMASTER_FF=y CONFIG_ZEROPLUS_FF=y # CONFIG_EDD_OFF is not set CONFIG_AFFS_FS=m CONFIG_JFFS2_FS=m CONFIG_JFFS2_FS_DEBUG=0 CONFIG_JFFS2_FS_WRITEBUFFER=y # CONFIG_JFFS2_FS_WBUF_VERIFY is not set CONFIG_JFFS2_SUMMARY=y CONFIG_JFFS2_FS_XATTR=y CONFIG_JFFS2_FS_POSIX_ACL=y CONFIG_JFFS2_FS_SECURITY=y CONFIG_JFFS2_COMPRESSION_OPTIONS=y CONFIG_JFFS2_ZLIB=y CONFIG_JFFS2_LZO=y CONFIG_JFFS2_RTIME=y # CONFIG_JFFS2_RUBIN is not set # CONFIG_JFFS2_CMODE_NONE is not set CONFIG_JFFS2_CMODE_PRIORITY=y # CONFIG_JFFS2_CMODE_SIZE is not set # CONFIG_JFFS2_CMODE_FAVOURLZO is not set CONFIG_RING_BUFFER=y CONFIG_RING_BUFFER_ALLOW_SWAP=y _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
