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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Rspamd-Queue-Id: 2FB931F38D X-Rspamd-Action: no action X-Spam-Flag: NO X-Spamd-Result: default: False [-4.51 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; TO_DN_SOME(0.00)[]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; FUZZY_BLOCKED(0.00)[rspamd.com]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; RCVD_TLS_ALL(0.00)[]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; FREEMAIL_CC(0.00)[lists.freedesktop.org,vger.kernel.org,gmail.com,ffwll.ch,linux.intel.com,kernel.org]; DNSWL_BLOCKED(0.00)[2a07:de40:b281:106:10:150:64:167:received,2a07:de40:b281:104:10:150:64:97:from]; RCPT_COUNT_SEVEN(0.00)[7]; MID_RHS_MATCH_FROM(0.00)[]; DKIM_TRACE(0.00)[suse.de:+]; RCVD_VIA_SMTP_AUTH(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:rdns,imap1.dmz-prg2.suse.org:helo] X-Spam-Score: -4.51 X-Spam-Level: Hi Am 19.06.25 um 18:07 schrieb Zenghui Yu: > Hi Thomas, > > On 2025/6/19 00:25, Thomas Zimmermann wrote: >> Hi >> >> Am 18.06.25 um 18:03 schrieb Zenghui Yu: >>> Hi all, >>> >>> Running the dmabuf-heap test [*] on mainline kernel triggers the >>> following splat: >>> >>>  ------------[ cut here ]------------ >>>  DMA-API: platform vgem: mapping sg segment longer than device claims to support [len=1048576] [max=65536] >> Thanks for the bug report. We have a possible fix in the latest drm- >> misc-next tree. Does it work if use replace DRM_GEM_SHMEM_DRIVER_OPS >> with DRM_GEM_SHMEM_DRIVER_OPS_NO_MAP_SGT at [1]? >> >> [1] https://elixir.bootlin.com/linux/v6.16-rc2/source/drivers/gpu/drm/vgem/vgem_drv.c#L118 > Thanks for the heads up! So I applied commit 660cd44659a0 > ("drm/shmem-helper: Import dmabuf without mapping its sg_table") [*] in > my local tree, together with your suggestion: > > diff --git a/drivers/gpu/drm/vgem/vgem_drv.c > b/drivers/gpu/drm/vgem/vgem_drv.c > index 2752ab4f1c97..ba0d4e611bd2 100644 > --- a/drivers/gpu/drm/vgem/vgem_drv.c > +++ b/drivers/gpu/drm/vgem/vgem_drv.c > @@ -115,7 +115,7 @@ static const struct drm_driver vgem_driver = { > .num_ioctls = ARRAY_SIZE(vgem_ioctls), > .fops = &vgem_driver_fops, > > - DRM_GEM_SHMEM_DRIVER_OPS, > + DRM_GEM_SHMEM_DRIVER_OPS_NO_MAP_SGT, > .gem_create_object = vgem_gem_create_object, > > .name = DRIVER_NAME, > > The warning message disappeared with that. Thanks again! Thanks for testing. I'll attempt to get this change into upstream in the near future. Best regards Thomas > > [*] > https://gitlab.freedesktop.org/drm/kernel/-/commit/660cd44659a05c5fbfce6d2bb1ce448aa0f35594 > > Zenghui -- -- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstrasse 146, 90461 Nuernberg, Germany GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman HRB 36809 (AG Nuernberg)