| commit | d59159c62f66de966c601c1b7174e798e4a3d0d4 | |
| author | Cliff Wickman <cpw@sgi.com> | |
| Wed, 8 Sep 2010 15:14:27 +0000 (8 10:14 -0500) | ||
| committer | Greg Kroah-Hartman <gregkh@suse.de> | |
| Mon, 22 Nov 2010 18:59:50 +0000 (22 10:59 -0800) | ||
| tree | c6e32df1dc1eeb56d9308f1e3f20dbf79a5e04da | treesnapshot (tar.gz zip) |
| parent | 7925978534b7180dac82c87eb6a5bbe96654ba75 | commitdiff |
x86, kdump: Change copy_oldmem_page() to use cached addressing
commit 37a2f9f30a360fb03522d15c85c78265ccd80287 upstream.
The copy of /proc/vmcore to a user buffer proceeds much faster
if the kernel addresses memory as cached.
With this patch we have seen an increase in transfer rate from
less than 15MB/s to 80-460MB/s, depending on size of the
transfer. This makes a big difference in time needed to save a
system dump.
Signed-off-by: Cliff Wickman <cpw@sgi.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: kexec@lists.infradead.org
LKML-Reference: <E1OtMLz-0001yp-Ia@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
commit 37a2f9f30a360fb03522d15c85c78265ccd80287 upstream.
The copy of /proc/vmcore to a user buffer proceeds much faster
if the kernel addresses memory as cached.
With this patch we have seen an increase in transfer rate from
less than 15MB/s to 80-460MB/s, depending on size of the
transfer. This makes a big difference in time needed to save a
system dump.
Signed-off-by: Cliff Wickman <cpw@sgi.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: kexec@lists.infradead.org
LKML-Reference: <E1OtMLz-0001yp-Ia@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| arch/x86/kernel/crash_dump_64.c | diffblobblamehistory |