[PATCH v2] kdump: fix OOM issue when vm.min_free_kbytes is set too high

[Hari Bathini]

When the value of vm.min_free_kbytes is set too high in /etc/sysctl.conf,
kdump kernel fails with OOM. As min_free_kbytes may not be relevant for
kdump kernel, this patch tries to fix the issue by removing it from the
file sysctl.conf and thus forcing default value for vm.min_free_kbytes
parameter.

Changes from v1 to v2:
1. Moved snippet modifying /etc/sysctl.conf file to a new function
2. Removed unnecessary expressions while modifying sysctl.conf

Signed-off-by: Hari Bathini 
---
 dracut-module-setup.sh |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
index dcebc47..72871d0 100755
--- a/dracut-module-setup.sh
+++ b/dracut-module-setup.sh
@@ -378,6 +378,16 @@ kdump_install_conf() {
     rm -f /tmp/$$-kdump.conf
 }

+# Certain things configured in /etc/sysctl.conf are not relevant
+# for kdump kernel. Tune them here
+kdump_sysctl_conf() {
+
+    # While min_free_kbytes may not be relevant for kdump kernel,
+    # it leads to OOM in cases where this value is too high.
+    # Let's be paranoid and force it to default value calculated by kernel.
+    sed -e "/min_free_kbytes/d" /etc/sysctl.conf > "${initdir}/etc/sysctl.conf"
+}
+
 kdump_iscsi_get_rec_val() {

local result
@@ -586,6 +596,7 @@ kdump_install_random_seed() {

install() {
     kdump_install_conf
+    kdump_sysctl_conf

if is_ssh_dump_target; then
         kdump_install_random_seed

[Dave Young]

Hi, Hari

Thanks for the update, but sorry that I find some other issue.

On 12/08/14 at 10:57am, Hari Bathini wrote:
> When the value of vm.min_free_kbytes is set too high in /etc/sysctl.conf,
> kdump kernel fails with OOM. As min_free_kbytes may not be relevant for
> kdump kernel, this patch tries to fix the issue by removing it from the
> file sysctl.conf and thus forcing default value for vm.min_free_kbytes
> parameter.
>
> Changes from v1 to v2:
> Moved snippet modifying /etc/sysctl.conf file to a new function
> Removed unnecessary expressions while modifying sysctl.conf
> Signed-off-by: Hari Bathini
>
> dracut-module-setup.sh |   11 +++++++++++
>  1 file changed, 11 insertions(+)
>
> diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
> index dcebc47..72871d0 100755
> --- a/dracut-module-setup.sh
> +++ b/dracut-module-setup.sh
> @@ -378,6 +378,16 @@ kdump_install_conf() {
>      rm -f /tmp/$$-kdump.conf
>  }
>
> +# Certain things configured in /etc/sysctl.conf are not relevant
> +# for kdump kernel. Tune them here
> +kdump_sysctl_conf() {
> # While min_free_kbytes may not be relevant for kdump kernel,
> # it leads to OOM in cases where this value is too high.
> # Let's be paranoid and force it to default value calculated by kernel.
> sed -e "/min_free_kbytes/d" /etc/sysctl.conf > "${initdir}/etc/sysctl.conf"

Checking dracut code, they install sysctl config files via modules.d/98systemd/:
There's below files:
            /etc/sysctl.d/*.conf \
            /etc/sysctl.conf

Thus, if we only checking sysctl.conf, we will miss sysctl.d/*.conf.
> +}
>
> kdump_iscsi_get_rec_val() {
>  local result
>
> @@ -586,6 +596,7 @@ kdump_install_random_seed() {
>
> install() {
>      kdump_install_conf
>
> kdump_sysctl_conf
>
> if is_ssh_dump_target; then
>     kdump_install_random_seed
>
> kexec mailing list
> [e-mail]
> https://lists.fedoraproject.org/mailman/listinfo/kexec

[Hari Bathini]

On 12/08/2014 11:22 AM, Dave Young wrote:
> Hi, Hari
>
> Thanks for the update, but sorry that I find some other issue.
>
> On 12/08/14 at 10:57am, Hari Bathini wrote:
> > When the value of vm.min_free_kbytes is set too high in /etc/sysctl.conf,
> > kdump kernel fails with OOM. As min_free_kbytes may not be relevant for
> > kdump kernel, this patch tries to fix the issue by removing it from the
> > file sysctl.conf and thus forcing default value for vm.min_free_kbytes
> > parameter.
> >
> > Changes from v1 to v2:
> > Moved snippet modifying /etc/sysctl.conf file to a new function
> > Removed unnecessary expressions while modifying sysctl.conf
> > Signed-off-by: Hari Bathini
> >
> > dracut-module-setup.sh |   11 +++++++++++
> >   1 file changed, 11 insertions(+)
> >
> > diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
> > index dcebc47..72871d0 100755
> > --- a/dracut-module-setup.sh
> > +++ b/dracut-module-setup.sh
> > @@ -378,6 +378,16 @@ kdump_install_conf() {
> >       rm -f /tmp/$$-kdump.conf
> >   }
> >
> > +# Certain things configured in /etc/sysctl.conf are not relevant
> > +# for kdump kernel. Tune them here
> > +kdump_sysctl_conf() {
> > # While min_free_kbytes may not be relevant for kdump kernel,
> > # it leads to OOM in cases where this value is too high.
> > # Let's be paranoid and force it to default value calculated by kernel.
> > sed -e "/min_free_kbytes/d" /etc/sysctl.conf > "${initdir}/etc/sysctl.conf"
>
> Checking dracut code, they install sysctl config files via modules.d/98systemd/:
> There's below files:
>              /etc/sysctl.d/*.conf \
>              /etc/sysctl.conf
>
> Thus, if we only checking sysctl.conf, we will miss sysctl.d/*.conf.

Dave, as /etc/sysctl.d/99-sysctl.conf is a softlink to ../sysctl.conf,
I think that shouldn't be a problem?

Thanks
Hari
> > +}
> >
> > kdump_iscsi_get_rec_val() {
> > local result
> >
> > @@ -586,6 +596,7 @@ kdump_install_random_seed() {
> >
> > install() {
> >       kdump_install_conf
> >
> > kdump_sysctl_conf
> >
> > if is_ssh_dump_target; then
> >      kdump_install_random_seed
> >
> > kexec mailing list
> > [e-mail]
> > https://lists.fedoraproject.org/mailman/listinfo/kexec

[Dave Young]

On 12/08/14 at 11:34am, Hari Bathini wrote:
> On 12/08/2014 11:22 AM, Dave Young wrote:
> > Hi, Hari
> >
> > Thanks for the update, but sorry that I find some other issue.
> >
> > On 12/08/14 at 10:57am, Hari Bathini wrote:
> > > When the value of vm.min_free_kbytes is set too high in /etc/sysctl.conf,
> > > kdump kernel fails with OOM. As min_free_kbytes may not be relevant for
> > > kdump kernel, this patch tries to fix the issue by removing it from the
> > > file sysctl.conf and thus forcing default value for vm.min_free_kbytes
> > > parameter.
> > >
> > > Changes from v1 to v2:
> > > Moved snippet modifying /etc/sysctl.conf file to a new function
> > > Removed unnecessary expressions while modifying sysctl.conf
> > > Signed-off-by: Hari Bathini
> > >
> > > dracut-module-setup.sh |   11 +++++++++++
> > >  1 file changed, 11 insertions(+)
> > >
> > > diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
> > > index dcebc47..72871d0 100755
> > > --- a/dracut-module-setup.sh
> > > +++ b/dracut-module-setup.sh
> > > @@ -378,6 +378,16 @@ kdump_install_conf() {
> > >      rm -f /tmp/$$-kdump.conf
> > >  }
> > > +# Certain things configured in /etc/sysctl.conf are not relevant
> > > +# for kdump kernel. Tune them here
> > > +kdump_sysctl_conf() {
> > > # While min_free_kbytes may not be relevant for kdump kernel,
> > > # it leads to OOM in cases where this value is too high.
> > > # Let's be paranoid and force it to default value calculated by kernel.
> > > sed -e "/min_free_kbytes/d" /etc/sysctl.conf > "${initdir}/etc/sysctl.conf"
> >
> > Checking dracut code, they install sysctl config files via modules.d/98systemd/:
> > There's below files:
> >             /etc/sysctl.d/*.conf \
> >             /etc/sysctl.conf
> >
> > Thus, if we only checking sysctl.conf, we will miss sysctl.d/*.conf.
>
> Dave, as /etc/sysctl.d/99-sysctl.conf is a softlink to ../sysctl.conf,
> I think that shouldn't be a problem?

If there's a /etc/sysctl.d/vm.conf which contains the min_free_kbytes, we can not
catch it..
> Thanks
> Hari
> > > +}
> > >
> > > kdump_iscsi_get_rec_val() {
> > >      local result
> > > @@ -586,6 +596,7 @@ kdump_install_random_seed() {
> > >  install() {
> > >      kdump_install_conf
> > > kdump_sysctl_conf
> > > if is_ssh_dump_target; then
> > >     kdump_install_random_seed
> > >
> > > kexec mailing list
> > > [e-mail]
> > > https://lists.fedoraproject.org/mailman/listinfo/kexec
>
> kexec mailing list
> [e-mail]
> https://lists.fedoraproject.org/mailman/listinfo/kexec

[Baoquan He]

On 12/08/14 at 02:08pm, Dave Young wrote:
> On 12/08/14 at 11:34am, Hari Bathini wrote:
> > On 12/08/2014 11:22 AM, Dave Young wrote:
> > > Hi, Hari
> > >
> > > Thanks for the update, but sorry that I find some other issue.
> > Dave, as /etc/sysctl.d/99-sysctl.conf is a softlink to ../sysctl.conf,
> > I think that shouldn't be a problem?
>
> If there's a /etc/sysctl.d/vm.conf which contains the min_free_kbytes, we can not
> catch it..

Yes, I agree /etc/sysctl.conf and /etc/sysctl.d/* are removed in
99kdumpbase. We didn't include it ever since rhel6, we shouldn't take
it into rhel7 now, otherwise it's a regression.

Thanks
Baoquan

[WANG Chao]

On 12/08/14 at 01:52pm, Dave Young wrote:
> Hi, Hari
>
> Thanks for the update, but sorry that I find some other issue.
>
> On 12/08/14 at 10:57am, Hari Bathini wrote:
> > When the value of vm.min_free_kbytes is set too high in /etc/sysctl.conf,
> > kdump kernel fails with OOM. As min_free_kbytes may not be relevant for
> > kdump kernel, this patch tries to fix the issue by removing it from the
> > file sysctl.conf and thus forcing default value for vm.min_free_kbytes
> > parameter.
> >
> > Changes from v1 to v2:
> > Moved snippet modifying /etc/sysctl.conf file to a new function
> > Removed unnecessary expressions while modifying sysctl.conf
> > Signed-off-by: Hari Bathini
> >
> > dracut-module-setup.sh |   11 +++++++++++
> >  1 file changed, 11 insertions(+)
> >
> > diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
> > index dcebc47..72871d0 100755
> > --- a/dracut-module-setup.sh
> > +++ b/dracut-module-setup.sh
> > @@ -378,6 +378,16 @@ kdump_install_conf() {
> >      rm -f /tmp/$$-kdump.conf
> >  }
> >
> > +# Certain things configured in /etc/sysctl.conf are not relevant
> > +# for kdump kernel. Tune them here
> > +kdump_sysctl_conf() {
> > # While min_free_kbytes may not be relevant for kdump kernel,
> > # it leads to OOM in cases where this value is too high.
> > # Let's be paranoid and force it to default value calculated by kernel.
> > sed -e "/min_free_kbytes/d" /etc/sysctl.conf > "${initdir}/etc/sysctl.conf"
>
> Checking dracut code, they install sysctl config files via modules.d/98systemd/:
> There's below files:
>             /etc/sysctl.d/*.conf \
>             /etc/sysctl.conf
>
> Thus, if we only checking sysctl.conf, we will miss sysctl.d/*.conf.

I checked in RHEL6 era we didn't include sysctl.conf in 2nd kernel. I
think we can do the same here. dracut will first install sysctl.conf in
98systemd module and we can remove it in our 99kdump module. Thoughts?

Thanks
WANG Chao
> > +}
> >
> > kdump_iscsi_get_rec_val() {
> >  local result
> >
> > @@ -586,6 +596,7 @@ kdump_install_random_seed() {
> >
> > install() {
> >      kdump_install_conf
> >
> > kdump_sysctl_conf
> >
> > if is_ssh_dump_target; then
> >     kdump_install_random_seed
> >
> > kexec mailing list
> > [e-mail]
> > https://lists.fedoraproject.org/mailman/listinfo/kexec
>
> kexec mailing list
> [e-mail]
> https://lists.fedoraproject.org/mailman/listinfo/kexec

[Hari Bathini]

On 12/08/2014 11:49 AM, WANG Chao wrote:
> On 12/08/14 at 01:52pm, Dave Young wrote:
> > Hi, Hari
> >
> > Thanks for the update, but sorry that I find some other issue.
> >
> > On 12/08/14 at 10:57am, Hari Bathini wrote:
> > > When the value of vm.min_free_kbytes is set too high in /etc/sysctl.conf,
> > > kdump kernel fails with OOM. As min_free_kbytes may not be relevant for
> > > kdump kernel, this patch tries to fix the issue by removing it from the
> > > file sysctl.conf and thus forcing default value for vm.min_free_kbytes
> > > parameter.
> > >
> > > Changes from v1 to v2:
> > > Moved snippet modifying /etc/sysctl.conf file to a new function
> > > Removed unnecessary expressions while modifying sysctl.conf
> > > Signed-off-by: Hari Bathini
> > >
> > > dracut-module-setup.sh |   11 +++++++++++
> > >   1 file changed, 11 insertions(+)
> > >
> > > diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
> > > index dcebc47..72871d0 100755
> > > --- a/dracut-module-setup.sh
> > > +++ b/dracut-module-setup.sh
> > > @@ -378,6 +378,16 @@ kdump_install_conf() {
> > >       rm -f /tmp/$$-kdump.conf
> > >   }
> > >
> > > +# Certain things configured in /etc/sysctl.conf are not relevant
> > > +# for kdump kernel. Tune them here
> > > +kdump_sysctl_conf() {
> > > # While min_free_kbytes may not be relevant for kdump kernel,
> > > # it leads to OOM in cases where this value is too high.
> > > # Let's be paranoid and force it to default value calculated by kernel.
> > > sed -e "/min_free_kbytes/d" /etc/sysctl.conf > "${initdir}/etc/sysctl.conf"
> >
> > Checking dracut code, they install sysctl config files via modules.d/98systemd/:
> > There's below files:
> >              /etc/sysctl.d/*.conf \
> >              /etc/sysctl.conf
> >
> > Thus, if we only checking sysctl.conf, we will miss sysctl.d/*.conf.

Hmmm...
That makes it a little tricky.
> I checked in RHEL6 era we didn't include sysctl.conf in 2nd kernel. I
> think we can do the same here. dracut will first install sysctl.conf in
> 98systemd module and we can remove it in our 99kdump module. Thoughts?

I think the best way to go forward is as suggested by Chao..
To remove sysctl in kdump dracut module..

Thanks
Hari
> Thanks
> WANG Chao
> > > +}
> > >
> > > kdump_iscsi_get_rec_val() {
> > > local result
> > >
> > > @@ -586,6 +596,7 @@ kdump_install_random_seed() {
> > >
> > > install() {
> > >       kdump_install_conf
> > >
> > > kdump_sysctl_conf
> > >
> > > if is_ssh_dump_target; then
> > >      kdump_install_random_seed
> > >
> > > kexec mailing list
> > > [e-mail]
> > > https://lists.fedoraproject.org/mailman/listinfo/kexec
> >
> > kexec mailing list
> > [e-mail]
> > https://lists.fedoraproject.org/mailman/listinfo/kexec

[Dave Young]

On 12/08/14 at 01:24pm, Hari Bathini wrote:
> On 12/08/2014 11:49 AM, WANG Chao wrote:
> > On 12/08/14 at 01:52pm, Dave Young wrote:
> > > Hi, Hari
> > >
> > > Thanks for the update, but sorry that I find some other issue.
> > >
> > > On 12/08/14 at 10:57am, Hari Bathini wrote:
> > > > When the value of vm.min_free_kbytes is set too high in /etc/sysctl.conf,
> > > > kdump kernel fails with OOM. As min_free_kbytes may not be relevant for
> > > > kdump kernel, this patch tries to fix the issue by removing it from the
> > > > file sysctl.conf and thus forcing default value for vm.min_free_kbytes
> > > > parameter.
> > > >
> > > > Changes from v1 to v2:
> > > > Moved snippet modifying /etc/sysctl.conf file to a new function
> > > > Removed unnecessary expressions while modifying sysctl.conf
> > > > Signed-off-by: Hari Bathini
> > > >
> > > > dracut-module-setup.sh |   11 +++++++++++
> > > >  1 file changed, 11 insertions(+)
> > > >
> > > > diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
> > > > index dcebc47..72871d0 100755
> > > > --- a/dracut-module-setup.sh
> > > > +++ b/dracut-module-setup.sh
> > > > @@ -378,6 +378,16 @@ kdump_install_conf() {
> > > >      rm -f /tmp/$$-kdump.conf
> > > >  }
> > > > +# Certain things configured in /etc/sysctl.conf are not relevant
> > > > +# for kdump kernel. Tune them here
> > > > +kdump_sysctl_conf() {
> > > > # While min_free_kbytes may not be relevant for kdump kernel,
> > > > # it leads to OOM in cases where this value is too high.
> > > > # Let's be paranoid and force it to default value calculated by kernel.
> > > > sed -e "/min_free_kbytes/d" /etc/sysctl.conf > "${initdir}/etc/sysctl.conf"
> > >
> > > Checking dracut code, they install sysctl config files via modules.d/98systemd/:
> > > There's below files:
> > >             /etc/sysctl.d/*.conf \
> > >             /etc/sysctl.conf
> > >
> > > Thus, if we only checking sysctl.conf, we will miss sysctl.d/*.conf.
>
> Hmmm...
> That makes it a little tricky.
> > I checked in RHEL6 era we didn't include sysctl.conf in 2nd kernel. I
> > think we can do the same here. dracut will first install sysctl.conf in
> > 98systemd module and we can remove it in our 99kdump module. Thoughts?
>
> I think the best way to go forward is as suggested by Chao..
> To remove sysctl in kdump dracut module..

Ok, please send a new patch for this.

I think we can do something like below for future fix:
1) add kernel cmdline params like: sysctl.x.y=z [x=vm,net,etc.] [y=min_free_kbytes, etc.]
2) add kernel cmdline, nosysctl so that only the params which are passed in kernel cmdline are used.
3) remove the sysctl.conf deletion in kdump module, suggest user to add nosysctl in cmdline
> Thanks
> Hari
> > Thanks
> > WANG Chao
> > > > +}
> > > >
> > > > kdump_iscsi_get_rec_val() {
> > > >      local result
> > > > @@ -586,6 +596,7 @@ kdump_install_random_seed() {
> > > >  install() {
> > > >      kdump_install_conf
> > > > kdump_sysctl_conf
> > > > if is_ssh_dump_target; then
> > > >     kdump_install_random_seed
> > > >
> > > > kexec mailing list
> > > > [e-mail]
> > > > https://lists.fedoraproject.org/mailman/listinfo/kexec
> > >
> > > kexec mailing list
> > > [e-mail]
> > > https://lists.fedoraproject.org/mailman/listinfo/kexec
>
> kexec mailing list
> [e-mail]
> https://lists.fedoraproject.org/mailman/listinfo/kexec

[Baoquan He]

On 12/08/14 at 05:06pm, Dave Young wrote:
> On 12/08/14 at 01:24pm, Hari Bathini wrote:
> > On 12/08/2014 11:49 AM, WANG Chao wrote:
> > > On 12/08/14 at 01:52pm, Dave Young wrote:
> > > > Hi, Hari
> > > >
> > > > Thanks for the update, but sorry that I find some other issue.
> > >
> > > Checking dracut code, they install sysctl config files via modules.d/98systemd/:
> > > > There's below files:
> > > >             /etc/sysctl.d/*.conf \
> > > >             /etc/sysctl.conf
> > > >
> > > > Thus, if we only checking sysctl.conf, we will miss sysctl.d/*.conf.
> >
> > Hmmm...
> > That makes it a little tricky.
> > > I checked in RHEL6 era we didn't include sysctl.conf in 2nd kernel. I
> > > think we can do the same here. dracut will first install sysctl.conf in
> > > 98systemd module and we can remove it in our 99kdump module. Thoughts?
> >
> > I think the best way to go forward is as suggested by Chao..
> > To remove sysctl in kdump dracut module..
>
> Ok, please send a new patch for this.
>
> I think we can do something like below for future fix:
> add kernel cmdline params like: sysctl.x.y=z [x=vm,net,etc.] [y=min_free_kbytes, etc.]
> add kernel cmdline, nosysctl so that only the params which are passed in kernel cmdline are used.
> remove the sysctl.conf deletion in kdump module, suggest user to add nosysctl in cmdline

Interesting, nosysctl is a good idea.
>

[Dave Young]

On 12/08/14 at 10:57am, Hari Bathini wrote:
> When the value of vm.min_free_kbytes is set too high in /etc/sysctl.conf,
> kdump kernel fails with OOM. As min_free_kbytes may not be relevant for
> kdump kernel, this patch tries to fix the issue by removing it from the
> file sysctl.conf and thus forcing default value for vm.min_free_kbytes
> parameter.
>
> Changes from v1 to v2:
> Moved snippet modifying /etc/sysctl.conf file to a new function
> Removed unnecessary expressions while modifying sysctl.conf
> Signed-off-by: Hari Bathini
>
> dracut-module-setup.sh |   11 +++++++++++
>  1 file changed, 11 insertions(+)
>
> diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
> index dcebc47..72871d0 100755
> --- a/dracut-module-setup.sh
> +++ b/dracut-module-setup.sh
> @@ -378,6 +378,16 @@ kdump_install_conf() {
>      rm -f /tmp/$$-kdump.conf
>  }
>
> +# Certain things configured in /etc/sysctl.conf are not relevant
> +# for kdump kernel. Tune them here
> +kdump_sysctl_conf() {
> # While min_free_kbytes may not be relevant for kdump kernel,
> # it leads to OOM in cases where this value is too high.
> # Let's be paranoid and force it to default value calculated by kernel.
> sed -e "/min_free_kbytes/d" /etc/sysctl.conf > "${initdir}/etc/sysctl.conf"
>
> +}
>
> kdump_iscsi_get_rec_val() {
>  local result
>
> @@ -586,6 +596,7 @@ kdump_install_random_seed() {
>
> install() {
>      kdump_install_conf
>
> kdump_sysctl_conf
>
> if is_ssh_dump_target; then
>     kdump_install_random_seed

ACK

Thanks
Dave

[Dave Young]

On 12/09/14 at 05:36pm, Dave Young wrote:
> On 12/08/14 at 10:57am, Hari Bathini wrote:
> > When the value of vm.min_free_kbytes is set too high in /etc/sysctl.conf,
> > kdump kernel fails with OOM. As min_free_kbytes may not be relevant for
> > kdump kernel, this patch tries to fix the issue by removing it from the
> > file sysctl.conf and thus forcing default value for vm.min_free_kbytes
> > parameter.
> >
> > Changes from v1 to v2:
> > Moved snippet modifying /etc/sysctl.conf file to a new function
> > Removed unnecessary expressions while modifying sysctl.conf
> > Signed-off-by: Hari Bathini
> >
> > dracut-module-setup.sh |   11 +++++++++++
> >  1 file changed, 11 insertions(+)
> >
> > diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
> > index dcebc47..72871d0 100755
> > --- a/dracut-module-setup.sh
> > +++ b/dracut-module-setup.sh
> > @@ -378,6 +378,16 @@ kdump_install_conf() {
> >      rm -f /tmp/$$-kdump.conf
> >  }
> >
> > +# Certain things configured in /etc/sysctl.conf are not relevant
> > +# for kdump kernel. Tune them here
> > +kdump_sysctl_conf() {
> > # While min_free_kbytes may not be relevant for kdump kernel,
> > # it leads to OOM in cases where this value is too high.
> > # Let's be paranoid and force it to default value calculated by kernel.
> > sed -e "/min_free_kbytes/d" /etc/sysctl.conf > "${initdir}/etc/sysctl.conf"
> >
> > +}
> >
> > kdump_iscsi_get_rec_val() {
> >  local result
> >
> > @@ -586,6 +596,7 @@ kdump_install_random_seed() {
> >
> > install() {
> >      kdump_install_conf
> >
> > kdump_sysctl_conf
> >
> > if is_ssh_dump_target; then
> >     kdump_install_random_seed
>
> ACK

self NACK, I meant to ack the patch for rm sysctl*
> Thanks
> Dave