From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
To: axboe@kernel.dk
Cc: akpm@linux-foundation.org, smcameron@yahoo.com,
linux-kernel@vger.kernel.org, mike.miller@hp.com,
thenzl@redhat.com
Subject: [PATCH 4/5] cciss: limit commands allocated on reset_devices
Date: Fri, 22 Oct 2010 14:21:17 -0500 [thread overview]
Message-ID: <20101022192117.25567.17893.stgit@beardog.cce.hp.com> (raw)
In-Reply-To: <20101022191738.25567.43468.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 03afef8..55fed21 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4039,6 +4039,11 @@ 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:[~2010-10-22 19:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-22 19:20 [PATCH 0/5] cciss updates, PCI ID changes, kdump reset fixes Stephen M. Cameron
2010-10-22 19:21 ` [PATCH 1/5] cciss: remove controllers supported by hpsa Stephen M. Cameron
2010-10-22 19:46 ` Bruno Prémont
2010-10-22 19:21 ` [PATCH 2/5] cciss: fix board status waiting code Stephen M. Cameron
2010-10-22 19:21 ` [PATCH 3/5] cciss: Use kernel provided PCI state save and restore functions Stephen M. Cameron
2010-10-22 19:36 ` Stephen Cameron
2010-10-22 19:49 ` Jens Axboe
2010-10-22 19:21 ` Stephen M. Cameron [this message]
2010-10-22 19:21 ` [PATCH 5/5] cciss: use usleep_range not msleep for small sleeps Stephen M. Cameron
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