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Date: Thu, 19 Feb 2015 06:31:00 -0500 (EST) From: Lukas Czerner <lczerner@...hat.com> To: Dave Chinner <david@...morbit.com> Cc: linux-ext4@...r.kernel.org Subject: Re: [PATCH] ext4: Allocate entire range in zero range Hi Dave, yes I am planning to send a regression test for this case as well. Thanks! -Lukas ----- Original Message ----- From: "Dave Chinner" <david@...morbit.com> To: "Lukas Czerner" <lczerner@...hat.com> Cc: linux-ext4@...r.kernel.org Sent: Thursday, February 19, 2015 1:49:35 AM Subject: Re: [PATCH] ext4: Allocate entire range in zero range On Wed, Feb 18, 2015 at 05:49:28PM +0100, Lukas Czerner wrote: > Currently there is a bug in zero range code which causes zero range > calls to only allocate block aligned portion of the range, while > ignoring the rest in some cases. > > In some cases, namely if the end of the range is past isize, we do > attempt to preallocate the last nonaligned block. However this might > cause kernel to BUG() in some carefully designed zero range requests on > setups where page size > block size. Is there a regression test you could write to exercise these casesi in future? Cheers, Dave. -- Dave Chinner david@...morbit.com -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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