Re: [PATCH] dma-buf: Move sysfs work out of DMA-BUF export/release path

2022-01-11 Thread Christian König
Am 11.01.22 um 12:16 schrieb Greg Kroah-Hartman: On Tue, Jan 11, 2022 at 11:58:07AM +0100, Christian König wrote: This is also not a problem due to the high number of DMA-BUF exports during launch time, as even a single export can be delayed for an unpredictable amount of time. We cannot elimi

Re: [PATCH] dma-buf: Move sysfs work out of DMA-BUF export/release path

2022-01-11 Thread Greg Kroah-Hartman
On Tue, Jan 11, 2022 at 11:58:07AM +0100, Christian König wrote: > > > This is also not a problem due to the high number of DMA-BUF > > > exports during launch time, as even a single export can be delayed for > > > an unpredictable amount of time. We cannot eliminate DMA-BUF exports > > > completel

Re: [PATCH] dma-buf: Move sysfs work out of DMA-BUF export/release path

2022-01-11 Thread Christian König
Am 11.01.22 um 09:35 schrieb Daniel Vetter: On Tue, Jan 11, 2022 at 7:02 AM Hridya Valsaraju wrote: On Sun, Jan 9, 2022 at 11:28 PM Christian König wrote: Am 07.01.22 um 22:25 schrieb Hridya Valsaraju: On Fri, Jan 7, 2022 at 10:17 AM Hridya Valsaraju wrote: On Fri, Jan 7, 2022 at 2:22 AM C

Re: [PATCH] dma-buf: Move sysfs work out of DMA-BUF export/release path

2022-01-11 Thread Daniel Vetter
On Tue, Jan 11, 2022 at 7:02 AM Hridya Valsaraju wrote: > > On Sun, Jan 9, 2022 at 11:28 PM Christian König > wrote: > > > > Am 07.01.22 um 22:25 schrieb Hridya Valsaraju: > > > On Fri, Jan 7, 2022 at 10:17 AM Hridya Valsaraju > > > wrote: > > >> On Fri, Jan 7, 2022 at 2:22 AM Christian König

Re: [PATCH] dma-buf: Move sysfs work out of DMA-BUF export/release path

2022-01-09 Thread Christian König
Am 07.01.22 um 22:25 schrieb Hridya Valsaraju: On Fri, Jan 7, 2022 at 10:17 AM Hridya Valsaraju wrote: On Fri, Jan 7, 2022 at 2:22 AM Christian König wrote: Am 06.01.22 um 20:04 schrieb Hridya Valsaraju: On Thu, Jan 6, 2022 at 12:59 AM Christian König wrote: Am 05.01.22 um 00:51 schrieb Hr

Re: [PATCH] dma-buf: Move sysfs work out of DMA-BUF export/release path

2022-01-07 Thread Christian König
Am 06.01.22 um 20:04 schrieb Hridya Valsaraju: On Thu, Jan 6, 2022 at 12:59 AM Christian König wrote: Am 05.01.22 um 00:51 schrieb Hridya Valsaraju: Recently, we noticed an issue where a process went into direct reclaim while holding the kernfs rw semaphore for sysfs in write(exclusive) mode.

Re: [PATCH] dma-buf: Move sysfs work out of DMA-BUF export/release path

2022-01-06 Thread Christian König
Am 05.01.22 um 00:51 schrieb Hridya Valsaraju: Recently, we noticed an issue where a process went into direct reclaim while holding the kernfs rw semaphore for sysfs in write(exclusive) mode. This caused processes who were doing DMA-BUF exports and releases to go into uninterruptible sleep since

Re: [PATCH] dma-buf: Move sysfs work out of DMA-BUF export/release path

2022-01-05 Thread Greg Kroah-Hartman
On Tue, Jan 04, 2022 at 03:51:48PM -0800, Hridya Valsaraju wrote: > Recently, we noticed an issue where a process went into direct reclaim > while holding the kernfs rw semaphore for sysfs in write(exclusive) > mode. This caused processes who were doing DMA-BUF exports and releases > to go into uni