Tejun Heo ba02508248 [PATCH] blk: fix tag shrinking (revive real_max_size) ... My patch in commit fa72b903f7 incorrectly removed blk_queue_tag->real_max_depth. The original resize implementation was incorrect in the following points. * actual allocation size of tag_index was shorter than real_max_size, but assumed to be of the same size, possibly causing memory access beyond the allocated area. * bits in tag_map between max_deptn and real_max_depth were initialized to 1's, making the tags permanently reserved. In an attempt to fix above two bugs, I had removed allocation optimization in init_tag_map and real_max_size. Tag map/index were allocated and freed immediately during resize. Unfortunately, I wasn't considering that tag map/index can be resized dynamically with tags beyond new_depth active. This led to accessing freed area after shrinking tags and led to the following bug reporting thread on linux-scsi. http://marc.theaimsgroup.com/?l=linux-scsi&m=112319898111885&w=2 To fix the problem, I've revived real_max_depth without allocation optimization in init_tag_map, and Andrew Vasquez confirmed that the problem was fixed. As Jens is not going to be available for a week, he asked me to make sure that this patch reaches you. http://marc.theaimsgroup.com/?l=linux-scsi&m=112325778530886&w=2 Also, a comment was added to make sure that real_max_size is needed for dynamic shrinking. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2005-08-05 13:43:16 -07:00
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aoe
paride
acsi_slm.c
acsi.c
amiflop.c
as-iosched.c
ataflop.c
cciss_cmd.h
cciss_scsi.c
cciss_scsi.h
cciss.c	[PATCH] cciss per disk queue	2005-07-28 08:39:01 -07:00
cciss.h	[PATCH] cciss per disk queue	2005-07-28 08:39:01 -07:00
cfq-iosched.c	[PATCH] cfq-iosched: fix problem with barriers and max_depth == 1	2005-08-02 11:19:18 -07:00
cpqarray.c
cpqarray.h
cryptoloop.c
DAC960.c
DAC960.h
deadline-iosched.c
elevator.c
floppy.c
genhd.c
ida_cmd.h
ida_ioctl.h
ioctl.c
Kconfig
Kconfig.iosched
ll_rw_blk.c	[PATCH] blk: fix tag shrinking (revive real_max_size)	2005-08-05 13:43:16 -07:00
loop.c
Makefile
nbd.c
noop-iosched.c
pktcdvd.c
ps2esdi.c
rd.c
scsi_ioctl.c
smart1,2.h
swim3.c
swim_iop.c
sx8.c	[PATCH] turn many #if $undefined_string into #ifdef $undefined_string	2005-07-27 16:26:08 -07:00
ub.c
umem.c
viodasd.c
xd.c
xd.h
z2ram.c