From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leon Romanovsky Subject: Re: multipath IB/srp fail-over testing lands up in dump stack in swiotlb_alloc_coherent() Date: Tue, 14 Jun 2016 16:15:52 +0300 Message-ID: <20160614131552.GP5408@leon.nu> References: <19156300.41876496.1465771227395.JavaMail.zimbra@redhat.com> <2d316ddf-9a2a-3aba-cf2d-fcdaafbaa848@sandisk.com> <20160613140747.GL5408@leon.nu> <946373818.41993264.1465827597452.JavaMail.zimbra@redhat.com> <887623939.42004497.1465831339845.JavaMail.zimbra@redhat.com> <450384210.42057823.1465857004662.JavaMail.zimbra@redhat.com> <1964187258.42093298.1465869387551.JavaMail.zimbra@redhat.com> <11e680c4-84b3-1cd6-133c-36f71bd853d0@sandisk.com> <20160614120833.GO5408@leon.nu> Reply-To: leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="R3SAtXwgGp429mN7" Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Bart Van Assche Cc: Laurence Oberman , Yishai Hadas , linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org --R3SAtXwgGp429mN7 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jun 14, 2016 at 02:25:15PM +0200, Bart Van Assche wrote: > On 06/14/2016 02:08 PM, Leon Romanovsky wrote: > >On Tue, Jun 14, 2016 at 11:24:28AM +0200, Bart Van Assche wrote: > >>On 06/14/2016 03:56 AM, Laurence Oberman wrote: > >>>Tracing [ ... ] > >> > >>Can you try to set the kernel command line parameter swiotlb to a value= that > >>is a multiple of its default (64MB), reboot and see whether that helps?= See > >>also Documentation/kernel-parameters.txt in the kernel tree. > > > >Do you think that 64MB is not enough for this scenario? >=20 > Hello Leon, >=20 > Does this mean that you think that the "swiotlb buffer is full" messages > reported by Laurence could be caused by something else than hitting the > swiotlb limit? I don't have enough knowledge in that area to answer if message "swiotlb buffer is full" is correctly explain current situation and I will be glad to get input from you about it. Thanks. >=20 > Bart. > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org > More majordomo info at http://vger.kernel.org/majordomo-info.html --R3SAtXwgGp429mN7 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJXYAOIAAoJEORje4g2clinJhEP/2qwW0io101gIQEr4Em6MehG VEKtjN7XlvSCrJiuTVTIAjmeu6HDCSPDIk7gbVAPvm29p56W6u/3kZGOdq753Xhi 8O/EjpJeZ6Rglil4WabKL3O0BmtUxKQZlMS8XwRNWwVqkByHQuGlvX+rReK/UWQ5 oB86vOfLHP+j62VaZ7yVjbYpNT1Hh78cmYzIN0IrrR18ImuVdKZ6SIL5EDaXRkPb +Se3C/upu53arSCZsYcldCKulciJmXoBolWNaQdPtlOSrxne3+2RRTPAUf11H5Qk MejFYCnLz1NvFeuX/4kUDKyhCCNkyfiQ1LTsevPbUQaNR7sC7NGbrgAnNbK05jzr rrAgJCESJGDoOHR09FPhZywFymn7YLX6tXN3LD6EGX4EGXoUO3Q2aJ99m3c15kD/ GQc32vaU5Uysq2IbBZJRJIeE+4W0FJO1gvQpJ55qtNdM4di0NSGazH7aRcS/gprt oE2bx/tMwYX9ZrbtPYBgcm7NUPGWSwk0xcx7jGYKi4oNNuMO9rg/DMGvgLqe59Fz HPYJeKYDANHIOFSi6HmD91MhaRpGEMV5GjYhlwkbIvzRMYRvE19VPz7WEEDEhzTs BFOoG4+tJyWHUCZx3FdfgEtGhziu3Q4n4E2ourzh8xLFWAnLVbEDOFAtPeAAxIqx 4da9ze8h/vp1n0cFiA2q =xOuq -----END PGP SIGNATURE----- --R3SAtXwgGp429mN7-- -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html