From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
To: axboe@kernel.dk, James.Bottomley@HansenPartnership.com
Cc: akpm@linux-foundation.org, thenzl@redhat.com, mike.miller@hp.com,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 08/13] cciss: limit commands allocated on reset_devices
Date: Fri, 08 Oct 2010 15:06:42 -0500 [thread overview]
Message-ID: <20101008200642.24279.43191.stgit@beardog.cce.hp.com> (raw)
In-Reply-To: <20101008200453.24279.6638.stgit@beardog.cce.hp.com>
From: Stephen M. Cameron <scameron@beardog.cce.hp.com>
This is to conserve memory in a memory-limited kdump scenario
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
---
drivers/block/cciss.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 7741e3b..08cbee8 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4059,6 +4059,11 @@ static int __devinit cciss_find_cfgtables(ctlr_info_t *h)
static void __devinit cciss_get_max_perf_mode_cmds(struct ctlr_info *h)
{
h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
+
+ /* Limit commands in memory limited kdump scenario. */
+ if (reset_devices && h->max_commands > 32)
+ h->max_commands = 32;
+
if (h->max_commands < 16) {
dev_warn(&h->pdev->dev, "Controller reports "
"max supported commands of %d, an obvious lie. "
next prev parent reply other threads:[~2010-10-08 20:06 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-08 20:06 [PATCH 00/13] Patches for cciss and hpsa Stephen M. Cameron
2010-10-08 20:06 ` [PATCH 01/13] cciss: remove controllers supported by hpsa Stephen M. Cameron
2010-10-25 20:09 ` James Bottomley
2010-10-25 20:26 ` Miller, Mike (OS Dev)
2010-10-25 22:04 ` scameron
2010-10-08 20:06 ` [PATCH 02/13] hpsa: fix board status waiting code Stephen M. Cameron
2010-10-08 20:06 ` [PATCH 03/13] hpsa: Use kernel provided PCI state save and restore functions Stephen M. Cameron
2010-10-08 20:06 ` [PATCH 04/13] hpsa: limit commands allocated on reset_devices Stephen M. Cameron
2010-10-08 20:06 ` [PATCH 05/13] hpsa: do not reset unknown boards " Stephen M. Cameron
2010-10-08 20:06 ` [PATCH 06/13] cciss: fix board status waiting code Stephen M. Cameron
2010-10-08 20:06 ` [PATCH 07/13] cciss: Use kernel provided PCI state save and restore functions Stephen M. Cameron
2010-10-08 20:06 ` Stephen M. Cameron [this message]
2010-10-08 20:06 ` [PATCH 09/13] cciss: use usleep_range not msleep for small sleeps Stephen M. Cameron
2010-10-08 20:06 ` [PATCH 10/13] hpsa: take the adapter lock in hpsa_wait_for_mode_change_ack Stephen M. Cameron
2010-10-08 20:06 ` [PATCH 11/13] hpsa: allow driver to put controller in either simple or performant mode Stephen M. Cameron
2010-10-08 20:07 ` [PATCH 12/13] hpsa: use usleep_range not msleep for small sleeps Stephen M. Cameron
2010-10-08 20:07 ` [PATCH 13/13] hpsa: defend against zero sized buffers in passthru ioctls Stephen M. Cameron
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