From e37c4913c555bd149eba3af953fb5d3a1686dfbd Mon Sep 17 00:00:00 2001 From: Jeff Mahoney Date: Wed, 27 Apr 2011 16:22:20 -0400 Subject: [PATCH] [SCSI] iterate over devices individually for /proc/scsi/scsi On systems with very large numbers (> 1600 or so) of SCSI devices, cat /proc/scsi/scsi ends up failing with -ENOMEM. This is due to the show routine simply iterating over all of the devices with bus_for_each_dev(), and trying to dump all of them into the buffer at the same time. On my test system (using scsi_debug with 4064 devices), the output ends up being ~ 632k, far more than kmalloc will typically allow. This patch defines its own seq_file opreations to iterate over the scsi devices.The result is that each show() operation only dumps ~ 180 bytes into the buffer at a time so we don't run out of memory. If the "Attached devices" header isn't required, we can dump the sfile->private bit completely. Signed-off-by: Jeff Mahoney Signed-off-by: James Bottomley --- Reading git-format-patch failed