search for: bitmapped

Hi there everybody! I have the following problem: when i launch isobuster (a tool with which you can extract nearly every existable cd-image) I get an error in the console which says that a file called isobuster.enu couldnt be loaded. It should be in the isobuster directory but on my whole box there is no such file so i think it is implemented in the exe file which is the only one in the

Hello folks, I have a Filesystem that went R/O in one node but not in the second here is the output of the following command on the node with the R/O issue: fsck.ocfs2 -fn /dev/dm-23 Checking OCFS2 filesystem in /dev/dm-23: label: oraCRSMeta uuid: 71 df 25 70 8b 34 43 f8 a4 e7 cd 2c c5 66 84 27 number of blocks: 2209680 bytes per block: 4096

I'm commenting without understanding the logic. Wei Wang wrote: > + > +bool xb_preload(gfp_t gfp); > + Want __must_check annotation, for __radix_tree_preload() is marked with __must_check annotation. By error failing to check result of xb_preload() will lead to preemption kept disabled unexpectedly. > +int xb_set_bit(struct xb *xb, unsigned long bit) > +{ > + int err;

I'm commenting without understanding the logic. Wei Wang wrote: > + > +bool xb_preload(gfp_t gfp); > + Want __must_check annotation, for __radix_tree_preload() is marked with __must_check annotation. By error failing to check result of xb_preload() will lead to preemption kept disabled unexpectedly. > +int xb_set_bit(struct xb *xb, unsigned long bit) > +{ > + int err;

This is exactly the same as v1: https://www.redhat.com/archives/libguestfs/2018-December/msg00004.html except that it now frees the bitmap on unload (which the old code did not - there was always a memory leak). Rich.

Hi. I'm attempting to setup a box here to be a file-server for all my data. I'm attempting to resize an ext3 partition to demonstrate this capability to myself before fully committing to this system as the primary data storage. I'm having some problems resizing an ext3 filesystem after I've resized the underlying logical volume. Following the ext3 resize, fsck spits out lots

v2: https://www.redhat.com/archives/libguestfs/2018-December/msg00039.html v2 -> v3: - Fix all the issues raised in Eric's review. - Precompute some numbers to make the calculations easier. - Calculations now use bitshifts and masks in preference to division and modulo. - Clear existing bits before setting (which fixes a bug in the cache filter). Rich.

The cow and cache filters both use a bitmap mapping virtual disk blocks to status stored in the bitmap. The implementation of the bitmaps is very similar because one was derived from the other when the filters were implemented. The main difference is the cow filter uses a simple bitmap (one bit per block), whereas the cache filter uses two bits per block. This commit abstracts the bitmap

The cow and cache filters both use a bitmap mapping virtual disk blocks to status stored in the bitmap. The implementation of the bitmaps is very similar because one was derived from the other when the filters were implemented. The main difference is the cow filter uses a simple bitmap (one bit per block), whereas the cache filter uses two bits per block. This commit abstracts the bitmap

From: Matthew Wilcox <mawilcox at microsoft.com> The eXtensible Bitmap is a sparse bitmap representation which is efficient for set bits which tend to cluster. It supports up to 'unsigned long' worth of bits, and this commit adds the bare bones -- xb_set_bit(), xb_clear_bit() and xb_test_bit(). Signed-off-by: Matthew Wilcox <mawilcox at microsoft.com> Signed-off-by: Wei Wang

It's useful to be able to search for the next non-zero entry in a bitmap. This commit adds a ?bitmap_next? function to do that. Because the bitmap is just a uint8_t buffer, using fast string functions we should be able to do this quickly even if the bitmap is sparse. (However the actual implementation is not optimized since that is quite complicated - see to-do comments in

The cow and cache filters both use a bitmap mapping virtual disk blocks to status stored in the bitmap. The implementation of the bitmaps is very similar because one was derived from the other when the filters were implemented. The main difference is the cow filter uses a simple bitmap (one bit per block), whereas the cache filter uses two bits per block. This commit abstracts the bitmap

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I have some patches I'm working on to fix the cache filter. However this is a prelude. It should be simply pure refactoring. All tests pass still. Rich.

From: Matthew Wilcox <mawilcox at microsoft.com> The eXtensible Bitmap is a sparse bitmap representation which is efficient for set bits which tend to cluster. It supports up to 'unsigned long' worth of bits, and this commit adds the bare bones -- xb_set_bit(), xb_clear_bit(), xb_clear_bit_range(), xb_test_bit(), xb_find_next_set_bit(), xb_find_next_zero_bit(). More possible

On 12/2/18 10:33 AM, Richard W.M. Jones wrote: > The cow and cache filters both use a bitmap mapping virtual disk > blocks to status stored in the bitmap. The implementation of the > bitmaps is very similar because one was derived from the other when > the filters were implemented. > > The main difference is the cow filter uses a simple bitmap (one bit > per block), whereas

On 11/06/2016 07:37 PM, Li, Liang Z wrote: >> Let's say we do a 32k bitmap that can hold ~1M pages. That's 4GB of RAM. >> On a 1TB system, that's 256 passes through the top-level loop. >> The bottom-level lists have tens of thousands of pages in them, even on my >> laptop. Only 1/256 of these pages will get consumed in a given pass. >> > Your

On 11/06/2016 07:37 PM, Li, Liang Z wrote: >> Let's say we do a 32k bitmap that can hold ~1M pages. That's 4GB of RAM. >> On a 1TB system, that's 256 passes through the top-level loop. >> The bottom-level lists have tens of thousands of pages in them, even on my >> laptop. Only 1/256 of these pages will get consumed in a given pass. >> > Your

On Mon, Aug 28, 2017 at 06:08:29PM +0800, Wei Wang wrote: > From: Matthew Wilcox <mawilcox at microsoft.com> > > The eXtensible Bitmap is a sparse bitmap representation which is > efficient for set bits which tend to cluster. It supports up to > 'unsigned long' worth of bits, and this commit adds the bare bones -- > xb_set_bit(), xb_clear_bit() and xb_test_bit().

On Mon, Aug 28, 2017 at 06:08:29PM +0800, Wei Wang wrote: > From: Matthew Wilcox <mawilcox at microsoft.com> > > The eXtensible Bitmap is a sparse bitmap representation which is > efficient for set bits which tend to cluster. It supports up to > 'unsigned long' worth of bits, and this commit adds the bare bones -- > xb_set_bit(), xb_clear_bit() and xb_test_bit().