Re: [Fwd: [linux-audio-dev] info point on linux hdr]

2000-04-14 Thread Theodore Y. Ts'o
Date:Sat, 15 Apr 2000 01:35:10 +0200 From: Andi Kleen <[EMAIL PROTECTED]> On Sat, Apr 15, 2000 at 12:24:16AM +0200, Andrew Clausen wrote: > i mentioned in some remarks to benno how important i thought it was to > preallocate the files used for hard disk recording under linu

Re: [Fwd: [linux-audio-dev] info point on linux hdr]

2000-04-14 Thread Paul Barton-Davis
>PS: Does anyone know how to make a RAW I/O device on a spare disk partition, >and then put an ext2 over it (running the whole partition in RAWIO mode) ? >Is that possible ? I don't think so. The point of raw i/o is to provide character device-like access to a device that would otherwise be a blo

Re: [Fwd: [linux-audio-dev] info point on linux hdr]

2000-04-14 Thread Paul Barton-Davis
>Unfortunately efficient preallocation is rather hard with the current >ext2. To do it efficiently you just want to allocate the blocks in the >bitmaps without writing into the actual allocated blocks (otherwise >it would be as slow as the manual write-every-block-from-userspace trick) yes, its s

Re: [Fwd: [linux-audio-dev] info point on linux hdr]

2000-04-14 Thread Eric W. Biederman
Andrew Clausen <[EMAIL PROTECTED]> writes: > Hi all, > > Any comments?From: Paul Barton-Davis <[EMAIL PROTECTED]> > Subject: [linux-audio-dev] info point on linux hdr > To: [EMAIL PROTECTED] > Date: Fri Apr 14 07:10:10 2000 -0500 > > i mentioned in some remarks to benno how important i thought

Re: [Fwd: [linux-audio-dev] info point on linux hdr]

2000-04-14 Thread Andi Kleen
On Sat, Apr 15, 2000 at 12:24:16AM +0200, Andrew Clausen wrote: > i mentioned in some remarks to benno how important i thought it was to > preallocate the files used for hard disk recording under linux. [...] Unfortunately efficient preallocation is rather hard with the current ext2. To do it ef

Re: [Fwd: [linux-audio-dev] info point on linux hdr]

2000-04-14 Thread Benno Senoner
I can only say that I am not using any form of preallocation and still get acceptable performance, even if I am forced to use quite big buffers to overcome to filesystem latencies. I tried to compare ext2 to FAT, but I do not get visible differences in terms of buffer usage spikes (= disk thread b

[Fwd: [linux-audio-dev] info point on linux hdr]

2000-04-14 Thread Andrew Clausen
Hi all, Any comments? i mentioned in some remarks to benno how important i thought it was to preallocate the files used for hard disk recording under linux. i was doing more work on ardour yesterday, and had the occasion to create some new "tapes", of lengths from 2 to 40 minutes. the simple