Messages in this thread | | | From | Marc-Christian Petersen <> | Subject | Re: 2.[45] fixes for design locking bug in wait_on_page/wait_on_buffer/get_request_wait | Date | Sat, 16 Nov 2002 17:24:17 +0100 |
| |
Hi Andrea,
I've applied your patch to 2.4.19 final and 2.4.20 final and those "pausings" still exists when I do a full kernel tree copy with "cp -a linux-2.4.19 linux-2.4.20". When I am in a screen session and try to do a Ctrl-A-C to create a new screen session it comes up within 3-5 seconds ... If I want to switch to another session with Ctrl-A-N it sometimes happens fast and sometimes within 3-5 seconds ... I've put above in a "while true; do ...; done" loop. There is nothing else running or eating CPU and also nothing else eating i/o. This does not happen with virgin 2.4.18.
This is with a Celeron Tualatin 1300MHz, i815 chipset, 512MB RAM, UDMA100 HDD, DMA enabled.
/dev/hda:
multcount = 16 (on) IO_support = 1 (32-bit) unmaskirq = 0 (off) using_dma = 1 (on) keepsettings = 0 (off) readonly = 0 (off) readahead = 8 (on) geometry = 7299/255/63, sectors = 117266688, start = 0
Model=MAXTOR 6L060J3, FwRev=A93.0500, SerialNo=663219752652 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs } RawCHS=16383/16/63, TrkSize=32256, SectSize=21298, ECCbytes=4 BuffType=DualPortCache, BuffSize=1819kB, MaxMultSect=16, MultSect=16 CurCHS=4047/16/255, CurSects=16511760, LBA=yes, LBAsects=117266688 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 udma6 AdvancedPM=no WriteCache=enabled Drive conforms to: ATA/ATAPI-5 T13 1321D revision 1: 1 2 3 4 5
Does also appear if unmaskirq is set to 1.
ciao, Marc
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |