linux-kernel - [PATCH][V2] nommu: yield CPU while disposing VM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1289912805-4143-1-git-send-email-steve@digidescorp.com>
Date:	Tue, 16 Nov 2010 07:06:45 -0600
From:	"Steven J. Magnani" <steve@...idescorp.com>
To:	linux-mm@...ck.org
Cc:	stable@...nel.org, linux-kernel@...r.kernel.org, gerg@...pgear.com,
	kosaki.motohiro@...fujitsu.com, akpm@...ux-foundation.org,
	"Steven J. Magnani" <steve@...idescorp.com>
Subject: [PATCH][V2] nommu: yield CPU while disposing VM

Depending on processor speed, page size, and the amount of memory a process
is allowed to amass, cleanup of a large VM may freeze the system for many
seconds. This can result in a watchdog timeout.

Make sure other tasks receive some service when cleaning up large VMs.

Signed-off-by: Steven J. Magnani <steve@...idescorp.com>
---
diff -uprN a/mm/nommu.c b/mm/nommu.c
--- a/mm/nommu.c	2010-11-15 07:53:45.000000000 -0600
+++ b/mm/nommu.c	2010-11-15 07:57:13.000000000 -0600
@@ -1668,6 +1668,7 @@ void exit_mmap(struct mm_struct *mm)
 		mm->mmap = vma->vm_next;
 		delete_vma_from_mm(vma);
 		delete_vma(mm, vma);
+		cond_resched();
 	}
 
 	kleave("");

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/