REGRESSION in 2.6.13-rc1: Massive slowdown with Adaptec SCSI
Subsystems (2)
kernel 2.6.13-rc1-git7 after applaying patch transfer back to 72MB/s on aha19160 with 15k rpm seagate with reiserfs3 but possible deadlock in heavy IO - rsync ~50000-files from /mnt/seagate15k/a to /mnt/seagate15k/b ended in middle with deadlock of rsync (3 instances), pdflush, and gam_server in uninteruptible state -- system cannot kill this deadlocked uninterruptibles any clue ???
xboom
drivers/scsi/aic7xxx/aic7xxx_osm.c +8 -0
@@ -2633,6 +2633,11 @@ static void ahc_linux_set_dt(struct scsiahc_unlock (ahc, &flags); } +#if 0 +/* FIXME: This code claims to support IU and QAS. However, the actual +* sequencer code and aic7xxx_core have no support for these parameters and +* will get into a bad state if they're negotiated. Do not enable this +* unless you know what you're doing */ static void ahc_linux_set_qas (struct scsi_target *starget,int qas) {struct Scsi_Host *shost =dev_to_shost (starget->dev.parent);
@@ -2688,6 +2693,7 @@ static void ahc_linux_set_iu(struct scsi ppr_options, AHC_TRANS_GOAL, FALSE);ahc_unlock (ahc, &flags); } +#endif static struct spi_function_template ahc_linux_transport_functions = { .set_offset = ahc_linux_set_offset,
@@ -2698,10 +2704,12 @@ static struct spi_function_template ahc_ .show_width = 1, .set_dt = ahc_linux_set_dt, .show_dt =1 , +#if 0 .set_iu = ahc_linux_set_iu, .show_iu = 1, .set_qas = ahc_linux_set_qas, .show_qas = 1, +#endif };