Re: [PATCH v2 0/8] slab: provide and use krealloc_array()
On Tue, Nov 3, 2020 at 12:13 PM Bartosz Golaszewski wrote: > On Tue, Nov 3, 2020 at 5:14 AM Joe Perches wrote: > > On Mon, 2020-11-02 at 16:20 +0100, Bartosz Golaszewski wrote: > > > From: Bartosz Golaszewski > Yeah so I had this concern for devm_krealloc() and even sent a patch > that extended it to honor __GFP_ZERO before I noticed that regular > krealloc() silently ignores __GFP_ZERO. I'm not sure if this is on > purpose. Maybe we should either make krealloc() honor __GFP_ZERO or > explicitly state in its documentation that it ignores it? And my voice here is to ignore for the same reasons: respect realloc(3) and making common sense with the idea of REallocating (capital letters on purpose). -- With Best Regards, Andy Shevchenko ___ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
Re: [PATCH v2 0/8] slab: provide and use krealloc_array()
On Mon, 2020-11-02 at 16:20 +0100, Bartosz Golaszewski wrote: > From: Bartosz Golaszewski > > Andy brought to my attention the fact that users allocating an array of > equally sized elements should check if the size multiplication doesn't > overflow. This is why we have helpers like kmalloc_array(). > > However we don't have krealloc_array() equivalent and there are many > users who do their own multiplication when calling krealloc() for arrays. > > This series provides krealloc_array() and uses it in a couple places. My concern about this is a possible assumption that __GFP_ZERO will work, and as far as I know, it will not. ___ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
